For landlords and property managers, decisions about window maintenance are governed by safety, legality, and economics. Unlike general wear and tear on décor, the structural integrity and functionality of windows fall firmly under the landlord’s legal obligations.

The primary legal requirement, outlined in Section 11 of the Landlord and Tenant Act 1985, dictates that the landlord must keep the structure and exterior of the dwelling, including windows, in good repair. This means ensuring they are weather-tight, free from serious rot, and lock securely. Compliance is non-negotiable.

The economic decision: Repair versus replacement

When a tenant reports an issue, the first decision is whether to repair the defect or undertake a costly full replacement. Repairing a window is often the most cost-effective and fastest solution for rental properties, especially if the window is structurally sound and under 20 years old.

When repair is the best choice (High ROI)

• Security Issues: A jammed uPVC multi-point lock mechanism can almost always be replaced by a uPVC window specialist for a fraction of the cost of a new window.
• Failed Seals: Condensation between the glass requires an IGU (Insulated Glass Unit) replacement, which reuses the existing frame.
• Timber Mechanics: A broken sash cord, failed pulley, or minor timber rot should be repaired by a specialist restoration service.

When replacement is unavoidable

Full replacement is only recommended when the structural integrity of the frame is compromised or the window no longer meets current safety standards.

• Extensive Rot/Damage: If more than 50% of a timber frame is decayed, or if an old uPVC frame is warping or failing structurally.
• Legal Compliance: If the existing window is single-glazed and needs upgrading to meet minimum thermal standards or if a window in a habitable room doesn’t meet fire escape (egress) regulations.

Landlord vs. tenant responsibilities

Clear documentation is vital to avoid deposit disputes. The line between landlord and tenant responsibility is usually drawn at negligence.

• Landlord Responsibility (Structure & Function): Repairing structural elements (frames, glass), ensuring the window is weather-tight, and fixing mechanical failures due to age or defect (failed lock mechanism, broken hinge, rotting frame).
• Tenant Responsibility (Negligence): Damage caused by tenant misuse, neglect, or accident (e.g., forcing a jammed lock, cracking a pane of glass due to impact). The cost, caused by proven negligence, can be legally deducted from the deposit, provided the deposit is protected under a scheme.

Financial planning and maintenance for rental properties

Landlords should adopt a proactive stance to minimise reactive, expensive call-outs.

1. Scheduled Inspection: Include a detailed window inspection by a window fitter as part of your annual property check. This allows you to catch minor issues (blocked weep holes, loose hinges) before they escalate to major failures.
2. Planned Maintenance: Budget for preventative maintenance, such as re-sealing external perimeter gaps every 5-7 years and re-lubricating all multi-point locks annually. This extends the lifespan of the mechanism and ensures compliance.
3. Replacement Compliance: If replacement is necessary, always ensure the new units are installed by a FENSA/Certass registered fitter. This provides the necessary certificate, protecting your investment and guaranteeing compliance with all rental property laws (especially Part L and Part F).

By prioritising high-ROI repair and performing preventative maintenance, landlords can meet their legal obligations reliably and avoid the high, unscheduled cost of window replacements for years to come.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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I think we can all agree, windows are pretty important. They are constantly exposed to the UK’s questionable climate—from driving rain and frost to strong UV radiation and summer heat. Over time, these elements degrade the essential seals, hardware, and materials, leading to common problems like draughts, condensation, and mechanical failure. A proactive routine is the key to preventing costly major repairs that require a professional call-out.

Neglecting simple maintenance, such as not clearing blocked drainage holes or failing to lubricate uPVC windows, can lead to irreparable damage to the frames or mechanisms. This guide provides an essential maintenance checklist for all common window types, helping you keep your windows doing their jobs for as long as possible.

The quarterly maintenance check: Focusing on mechanisms

Perform this basic check-up on all your windows at least once every three months, focusing on the mechanical components that suffer from friction and use.

Specific maintenance tips

1. Timber Windows

Timber requires attention to the finish, which is its protective layer.

• Annually (Spring): Inspect painted and stained frames closely for any hairline cracks, blistering, or peeling paint, especially on the bottom rail. Touch up immediately, priming any bare wood before applying the final topcoat. UV light and moisture will exploit these cracks, leading to rapid rot.
• Focus: Check the condition of the putty or sealant securing the glass to the timber. Failed putty allows water to sit on the wood, starting the decay process.

2. uPVC and Aluminium Windows

These materials are low-maintenance but rely heavily on seals and hinges.

• Annually (Autumn): Check all external perimeter seals (where the frame meets the brickwork) for cracks or shrinkage. Rake out and replace any failed sealant to prevent moisture ingress before the freezing winter weather exacerbates the damage.
• Focus: Ensure all hinges and multi-point locks are fully lubricated to prevent the mechanism seizing in the cold months.

When to call a professional fitter

Routine maintenance will significantly reduce call-outs, but some issues require a specialist window fitter:

• Failed IGU Seal: If you see condensation between the two panes of glass, the double glazing seal repair has failed. The fitter will replace the entire IGU (Insulated Glass Unit) without removing the frame.
• Sash Alignment: If the window rubs or catches when closing, it needs realignment (toe and heeling), which requires professional skill to ensure the glass is correctly supported.
• Hinge Failure: Hinges on heavy uPVC windows eventually wear out. A uPVC window hinge replacement is a simple, cost-effective repair that restores full function and draught-proofing, saving the cost of a full window replacement.

Even though we take them for granted, a busted window can be one of the most annoying, and dangerous, problems in the home. By performing simple, routine maintenance, you are safeguarding your investment and significantly extending their lifespan.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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When you replace windows and doors in England and Wales, you are making a ‘material change’ to the property’s thermal performance and safety profile. As such, the work is subject to compliance with current Building Regulations, specifically Part L (Energy Efficiency) and Part F (Ventilation).

The purpose of FENSA (or equivalent schemes like Certass) is to provide a swift, efficient mechanism for confirming compliance without involving the often-slow local authority building control directly. This system protects the homeowner and ensures the work is carried out by a vetted, competent fitter. It is a cornerstone of consumer protection in the UK fenestration industry.

FENSA vs Certass: Competent person schemes (CPS)

FENSA (Fenestration Self-Assessment Scheme) and Certass are the two main government-authorised Competent Person Schemes (CPS) for the window industry in the UK. Both are equally valid ways to certify your window installation, offering the same level of legal protection.

Why the certificate is critical: The resale factor

The FENSA or Certass certificate is arguably the most important piece of paperwork you receive after the installation.

1. Compliance Proof: It serves as official, documented proof that the installation meets the necessary thermal (Part L) and safety (Part B, relating to fire escape and safety glass) standards.
2. Warranty: It provides a warranty directly from the installer and often includes an independent, third-party 10-year guarantee on the installation (covering failure due to workmanship or material defect).
3. Resale Value: It is a vital document required by solicitors during conveyancing when you come to sell your house. 

Do I need a FENSA certificate to sell my house? Yes. Without it, your solicitor may raise queries, potentially delaying the sale or forcing you to purchase an expensive indemnity insurance policy to cover the lack of evidence.

Building Regs Part L windows: Energy efficiency standards

The core regulation governing the thermal performance of window replacement is Part L, which aims to reduce carbon emissions from dwellings.

• U-Value Limits: The regulations set a maximum allowable U-value for replacement windows. Any unit installed must meet or exceed this target. This compliance is achieved by using modern, energy-efficient units.
• Key Components: Achieving the required thermal performance means the installer must use Low-Emissivity (Low-E) glass coatings (a thin, invisible layer that reflects heat back into the room) and inert gas fillings like Argon within the double-glazed unit.
• Part F (Ventilation): Alongside Part L, the regulations also mandate adequate ventilation (Part F). For replacement windows, this usually means incorporating trickle vents into the new frames to ensure continuous background ventilation, even when the window is closed, which is vital for reducing condensation and mould growth.

The pitfalls of non-certified installation

If you choose a non-registered fitter, you have two unappealing options:

1. Building Control Application: You must inform your local authority’s Building Control before the work starts. You will have to pay a fee, and an inspector will need to visit the site to check if the work is compliant. This process can be lengthy and lead to costly remedial work if the windows do not meet the standard.
2. Indemnity Insurance: If you don’t use Building Control and later discover you lack the necessary certification when selling the house, you will likely be forced to buy indemnity insurance. This policy insures against the potential financial risk of the local authority taking enforcement action (rare, but possible) but does not certify the quality of the windows themselves.

Hiring an installer registered with a scheme like FENSA or Certass is always the easiest, most reliable, and ultimately cheapest route for guaranteeing the quality and compliance of your windows.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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When replacing windows, the core decision often boils down to double versus triple glazing. Double glazing has been the UK standard for decades, but triple glazing—which adds a third pane of glass and another air/gas cavity—offers superior performance, albeit at a higher initial cost.

This guide helps homeowners evaluate the costs against the potential long-term return on investment to determine if the added expense is truly worth it.

Performance comparison: U-values and energy savings

The primary metric for comparing window performance is the U-value. This measures the rate of heat loss (lower U-value = better insulation).

The move from standard double glazing to triple glazing offers an estimated 10-15% improvement in U-value. For a homeowner, this translates directly to lower energy bills, particularly in northern, colder, or exposed areas of the UK.

Where triple glazing makes the most sense

While the difference in performance is clear, triple glazing is usually priced 20-30% higher. The ROI hinges on your existing windows and property type.

• Excellent ROI:
  • New Builds/Passive Houses: When heat loss targets are extremely low, triple glazing is often mandatory or essential to meet the design specification.
  • North-Facing or Exposed Walls: Walls that receive no direct sunlight lose the most heat. Upgrading these windows provides the most immediate return.
  • Homes with Electric Heating/Heat Pumps: Since these heating systems rely on efficient building envelopes, the cost savings on expensive electricity are significant.
• Marginal ROI:
  • South-Facing Walls: These windows benefit significantly from solar gain, and the energy loss saved by triple glazing may not offset the initial cost.
  • Homes in Mild Climates: The difference in heating bills compared to high-performance double glazing may take decades to pay back.

Beyond energy: Noise and condensation

Noise reduction

As we said before, standard triple glazing offers modest improvement over standard double glazing. If noise is the primary concern, a high-specification acoustic double glazed unit is often a better choice than a standard triple-glazed unit. For the best results in terms of  energy efficiency and noise, you need three panes of different thicknesses or a thick acoustic laminate layer.

Condensation

Triple glazing can almost eliminate internal condensation. By keeping the innermost pane of glass significantly warmer than the room’s dew point, the moisture in the air will not condense on the glass surface. This is a significant benefit for window lifespan and indoor air quality.

When reviewing quotes from window fitters, always compare the final U-value of the units offered, not just the number of panes. A high-quality double-glazed unit with a 1.0W/(m2K) U-value is often a more pragmatic and cost-effective choice than a basic triple-glazed unit with a similar U-value.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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Windows are often the weakest point of entry for burglars. While modern multi-point locking mechanisms on uPVC windows offer good primary security, older timber windows, ground-floor units, and external access points remain vulnerable. Upgrading window security is an essential step in protecting your family and valuables.

This guide focuses on technical and physical upgrades that a professional window fitter can install to significantly enhance resistance against forced entry and reduce the risk of glass breakage.

Upgrade 1: Toughened glass vs. laminated security glass

Standard glazing (even double glazing) is designed to break easily to allow escape in the event of a fire. Security-focused glazing is designed to do the opposite—resist shattering and remain in the frame.

• Toughened Glass: This glass shatters into small, safe cubes when broken, reducing injury risk. It does not offer meaningful security against a sustained attack, as the cubes fall away quickly.
• Laminated Security Glass: This is the gold standard. It consists of two or more panes bonded together with a flexible, high-strength plastic interlayer (PVB or SentryGlas). When broken, the glass cracks but the interlayer holds the pane together, keeping the intruder out. 

Upgrade 2: Window security film installation cost and use

For homeowners with existing, structurally sound glass they don’t want to replace, security window film offers a cost-effective alternative to laminated glass.

• Mechanism: A clear, strong film is applied to the interior face of the glass. When the glass is struck and shatters, the film holds all the pieces together in the frame, preventing entry and creating a strong deterrent.
• Benefits: It also offers UV protection and, depending on the film, can provide basic solar or acoustic protection.

Upgrade 3: Frame, Beading, and Hardware Enhancements

Security is only as good as the frame and fittings. A professional installer will check these often-overlooked weak spots:

Internal beading window security

• The Risk: Most older windows are externally beaded, meaning the glass unit can be easily removed from the outside by an intruder using a simple putty knife to pry out the glazing beads.
• The Fix: When replacing windows, choose internally beaded models. For existing windows, a fitter can often modify or replace the beads with security clips to prevent easy removal of the glass unit from the exterior.

Specialist locking hardware

• Sash Stops/Locks: For traditional sash windows, additional metal sash stops can be installed that prevent the window from being lifted more than a couple of inches, maintaining ventilation while securing against entry.
• Hinge Bolts: For external doors or ground-floor casement windows, extra bolts (sometimes called dog bolts) can be fitted inside the frame to prevent the sash from being prised open on the hinge side.

Window security bars installation and physical barriers

In very high-risk areas, window bars may be required.

• Grilles and Bars: These should be professionally fitted directly into the masonry or timber frame, not just screwed into the window frame itself. They can be fixed, hinged, or designed as bespoke, decorative wrought iron.
• Grille Regulations: If installing bars on an escape route window (like a bedroom), the bars must be hinged or removable and fitted with a quick-release mechanism that is accessible without a key from the inside to meet fire safety regulations.

Hiring a professional not only makes sure the security upgrades comply with insurance standards and are installed correctly, they also ensure the integrity and weatherproofing of the windows are maintained.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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For homeowners near busy roads, railway lines, or flight paths, noise pollution is a major source of stress. Windows, particularly standard double-glazed units, are often the weak point in a building’s acoustic defence. While standard double glazing is excellent at thermal insulation, it offers limited protection against the specific low-frequency rumble of traffic or the high-frequency whine of aircraft.

To effectively combat noise, a soundproofing window installer must address two key physical principles: mass and decoupling. A good professional will not just sell you a thicker unit; they will diagnose the type of noise you are experiencing and recommend a solution that targets that specific frequency spectrum.

Measuring noise mitigation: Rw and dB reduction

When discussing soundproofing, you will encounter the term Rw (Weighted Sound Reduction Index), measured in decibels (dB).

• Decibel Scale: The decibel scale is logarithmic. An increase of just 10dB represents a perceived doubling of the noise level. Conversely, a reduction of 10dB is perceived as halving the noise. A high-performance window should aim for an Rw of 38dB or higher to achieve a significant reduction in living noise.
• Targeting Frequencies: Traffic noise is primarily low-frequency. Standard double glazing only reduces sound by about 28dB – a level often insufficient for homes near major A-roads.

Principle 1: Mass, decoupling, and acoustic laminated glass

Standard double-glazing uses two panes of glass of the same thickness, which allows sound waves to resonate easily across both panes. Acoustic glass breaks this pattern.

Acoustic glazing cost

The most effective, modern method for sound reduction in a standard window frame is the use of high-performance laminated glass.

• The Laminated Layer: Acoustic glass uses a thin, specialist viscoelastic plastic (often PVB or specific acoustic interlayer) bonded between two panes of glass. This inter-layer acts like a flexible damper, absorbing the energy of the sound vibrations and preventing them from passing through to the inner pane.
• Asymmetrical Units (Decoupling): A professional fitter will specify an asymmetrical unit, meaning the two external panes of glass are of different thicknesses. This is the key to decoupling. Sound travels better through certain thicknesses; by using two different thicknesses, you avoid the phenomenon where the sound frequency can easily resonate across both panes simultaneously.
• The Gas Gap: The width of the inert gas gap (usually Argon) between the two panes also plays a role. A wider gap improves both thermal and acoustic performance by physically separating the panes.

Triple glazing noise reduction comparison

While triple glazing offers superior thermal performance, its acoustic benefits over high-quality double glazing can be marginal unless the three panes are specifically designed with different thicknesses and wider air gaps. If your primary goal is noise reduction, a high-specification acoustic laminated double-glazed unit is often more effective and cheaper than a standard triple-glazed unit.

Principle 2: Installation technique and airtightness

Even the most advanced acoustic glass will fail if noise is allowed to travel through the gaps around the frame. Any air gap is a noise leak.

The soundproofing window installer’s focus

• Airtight Installation: The professional ensures the frame is sealed meticulously into the wall opening. They use high-density foam or specialist acoustic sealant (not standard, low-grade silicone) to fill the structural gap between the frame and the masonry. This creates an airtight barrier that prevents flank transmission (noise entering through the side of the window recess).
• Frame Seals: The seals within the window itself, where the sash meets the frame, are also critical. High-quality multi-point locking mechanisms on uPVC and timber ensure the seals compress tightly. On older timber windows, a fitter may install bespoke compression seals or acoustic brush seals.

Secondary glazing for noise control (The ultimate fix)

For listed buildings, homes in conservation areas, or areas with extreme noise, secondary glazing offers the highest possible acoustic performance.

• Mechanism: It creates two independent window systems—the existing window and a new internal frame—separated by a significant air gap. This air gap provides the maximum possible decoupling, trapping the sound waves.
• Installation: This requires a specialist secondary glazing fitter. The gap between the primary and secondary window should be as wide as possible. Crucially, the secondary window itself should be fitted with thick glass and fitted with acoustic compression seals, not standard brush seals, for a perfect seal.

If you are suffering from high-level noise, the upfront acoustic glazing cost is a significant investment, but the ability to transform the comfort and tranquillity of your home and improve sleep quality makes the benefits well worth it. Always insist on a quote that specifies the exact Rw rating of the glass unit being proposed.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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uPVC windows dominate the UK market due to their durability, low maintenance, and excellent thermal performance. However, after years of continuous use, even the highest quality uPVC windows can develop common problems. These issues often relate to mechanical failure, rather than the frame itself, meaning a uPVC repair specialist can often restore full function for far less than the cost of replacement.

Problem 1: The dropped sash and alignment issues

This is perhaps the most common uPVC problem. The sash (the opening part) appears to have “dropped” slightly on the handle side, making it rub against the frame at the bottom or top when you try to close it.

1. Why the sash drops

The sash is heavy and is held in place by friction and the hinges. Over time, particularly on large, heavy windows (like bathroom obscures or large tilt-and-turn units), gravity can cause the sash to settle. This creates misalignment, preventing the multi-point locking mechanism from engaging correctly.

2. How to fix dropped uPVC window

• Hinge Adjustment: Modern uPVC sashes are fitted with small hexagonal adjustment screws on the hinges. A professional fitter will use an Allen key to turn these screws, which physically pulls the sash back into the correct square alignment within the frame.
• Packing: If adjustment isn’t enough (or if the seal is failing), the fitter may need to “toe and heel” the unit. This involves inserting specialist plastic glazing packers into the frame under the glass unit in specific corners to force the sash back into square. This requires specialist knowledge to ensure the glass remains fully supported.

Problem 2: Multi-point lock failure and jammed handles

The multi-point locking system is the heart of uPVC window security. It uses a handle to drive a central mechanism that extends bolts or mushroom cams at multiple points around the frame.

1. Faulty lock mechanism

If the handle spins freely or the key doesn’t turn the bolts, the internal gearing may have seized or snapped.

• Repair vs. Replacement: A skilled uPVC specialist will attempt to lubricate or replace the internal gearing strip (the espag) without needing to replace the entire window. 

2. Jammed handle

Often, a handle is jammed when the window is left slightly ajar and the locking mechanism attempts to engage—this is the anti-slam device kicking in.

• The fix: The fitter will bypass the anti-slam mechanism to reset the handle. This is a common service that avoids unnecessary lock replacement.

Problem 3: Draughts and failed seals

If you feel a draught or see condensation forming between the two panes of glass, you have a different issue.

1. Failed glazing unit seal (Between the glass)

Condensation between the panes means the hermetic seal around the double-glazed unit has failed, allowing moist air to enter.

• The fix: The entire glass unit (the IGU – Insulated Glass Unit) must be replaced. The frame itself is sound, and a fitter can simply replace the glass unit without removing the window frame.

2. Failed sash seal (Draughts)

If air is coming around the edge of the sash, the rubber gasket seals are likely perished, hardened, or compressed.

• The fix: A professional can remove and replace these seals with new rubber gaskets, immediately restoring the draught-proofing performance.

Hiring a professional for uPVC work saves you money by preventing unnecessary window replacement and is the quickest route to restoring the security and efficiency of your home.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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Roof windows and skylights, such as those made by Velux, are essential components of modern loft conversions, extensions, and flat roof systems. They transform dark attic spaces into light-filled rooms and provide crucial ventilation. However, their installation involves integrating a hole into the most critical part of your home’s weatherproofing—the roof. If installed incorrectly, the risk of water ingress and structural damage is high.

Hiring a certified skylight fitter who understands the nuances of leak prevention is non-negotiable for a long-lasting, watertight installation.

Structural considerations and building regulations

Before installation begins, the fitter must assess the structural integrity of the roof and ensure compliance with UK Building Regulations.

1. Structural assessment

• Rafters and Joists: The fitter must confirm that cutting a hole for the window will not compromise the load-bearing capacity of the existing rafters. If a rafter needs to be cut, the fitter (often in conjunction with a carpenter) will install a new timber framework, called a trimmer, to distribute the load around the new opening.
• Roof Type: The requirements differ significantly between a flat roof (where the window sits on an upstand) and a pitched roof (where the window is recessed into the tiles/slates).

2. Building regulations compliance

• Part L (Energy Efficiency): New roof windows must meet current thermal efficiency standards (U-values). This means installing modern, thermally broken glazing units.
• Part F (Ventilation): The window must provide adequate background and purge ventilation for the room to meet regulations.
• Part B (Fire Safety): If the window is being installed as part of an escape route from a loft conversion, it must be large enough and open wide enough to qualify as an egress window.

The key to roof window leak prevention: Flashing

The most critical part of any installation is the flashing installation. This is the engineered metal system that directs water away from the window frame and seamlessly integrates the window with the surrounding roofing material.

A professional will always install the flashing layers meticulously, overlapping them correctly, and ensuring the final finish sheds water away from the window base and down the roof slope.

Cost to fit a Velux window

The cost varies widely based on the complexity of the roof and the size of the unit. The labour costs are usually higher than for a vertical window replacement due to the specialist nature of the work and the heights involved.

• Labour Breakdown: The quote will typically include access (scaffolding or roof ladders), structural trimming, membrane cutting/sealing, window installation, flashing installation, and internal finishing (plasterboard).
• Window Type: Centre pivot windows are often cheaper and easier to fit than top-hung windows or bespoke electric models.

When selecting a skylight fitter, verify their experience with the specific roof system you have (flat or pitched) and check that their quote includes all elements of  leak prevention, particularly the manufacturer-specific flashing kit. A high-quality installation guarantees decades of light without the costly headache of leaks.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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Period sash windows are key architectural features in UK homes, particularly in Victorian and Edwardian properties. Their unique character, ventilation system, and deep timber profiles are often irreplaceable. When they rattle, stick, or suffer from rot, the common reaction is to seek full replacement. However, a reputable sash window restoration specialist will tell you that most sash windows can be restored to full working order, often achieving performance levels close to modern units for a fraction of the cost of new timber sashes.

Phase 1: Fixing the mechanics (Cords, weights, and balance)

A sash window works on a simple principle of balanced weight. The sashes (the moving parts) are connected by rope or cord to iron weights hidden within the box frame. If the cord snaps, the sash becomes unbalanced and heavy.

1. Repair sash window weights and cords

• Access: The fitter will first remove the internal staff beads and the sash itself to gain access to the weights within the box frame.
• Recording: The old cord is removed, and a new, high-quality waxed cotton or synthetic cord is fed over the pulley wheel and attached to the correct sash weight.
• Rebalancing: Crucially, a good fitter will check the balance. If new, heavier panes of glass have been fitted (e.g., standard double glazing or acoustic glass), the original iron weights must be supplemented or replaced with heavier ones to ensure the sash opens and closes smoothly and stays open at any height.

2. Lubrication and pulley repair

The pulley wheels often seize up after decades of paint build-up and grime. The fitter will clean, lubricate, or replace the old brass pulley wheels to ensure minimal friction, which is essential for a smooth glide. Without this step, the sash is hard to operate, placing unnecessary strain on the new cords.

Phase 2: Structural integrity and timber rot

Timber rot usually starts at the bottom rail of the lower sash and the window sill (the cill), where water pools or condensation sits. Full replacement is only necessary if 50% or more of the frame is decayed.

1. Sash window timber rot repair

• Cutting out decay: The rotten timber is surgically cut out using sharp tools.
• Splicing: New, treated timber (often durable hardwood like Accoya or Sapele) is precisely cut and spliced into the frame using strong, waterproof epoxy resins and glues.
• Consolidation: For areas of minor rot, the fitter may use specialist liquid timber consolidants that soak into the wood fibres, hardening the decayed area and stopping the rot from spreading.

2. Sill replacement

The window sill is the primary defence against water penetration. If the sill is heavily decayed, a new timber or stone sill must be fitted, ensuring it has the correct drip edge—a small groove underneath to encourage water to drip away from the wall rather than running back towards the frame.

Phase 3: Modern performance and draught proofing

Once the window is structurally sound and the mechanics are working perfectly, the main complaint of cold and rattling must be addressed. This is where draught proofing comes in, dramatically improving thermal and acoustic performance.

Draught proofing sash windows cost and method

• Routing: The specialist will carefully rout fine grooves into the sash meeting rails and the parting beads within the box frame.
• Inserting seals: Into these grooves, they insert high-performance brush pile or flexible silicone seals. These seals compress when the window is closed, virtually eliminating air gaps and the rattling sound.
• Impact: This system is incredibly effective, often reducing air leakage by up to 80%, making the room feel noticeably warmer and quieter without affecting the visual appearance of the window. 

Hiring the sash window restoration specialist

When getting quotes, ensure your tradesperson specifies the quality of the materials (e.g., high-density brush seals, waxed cotton cord, or hardwood for splicing) and their experience with period properties. If they instantly jump to full replacement without offering restoration options, you may not be dealing with a true specialist.

A professional restoration not only saves you money in the short term compared to replacement but also preserves the irreplaceable character and value of your historic home.

With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.

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The prices in this guide are accurate as of 2025* 

A set of new windows can update the appearance of your home, helping to modernise it with minimal building work. 

Importantly, new windows will also improve your home’s energy efficiency, thereby lowering your carbon footprint. This is because a lot of heat is lost through your windows and walls, so insulating them properly will help reduce your energy bills. 

Not to mention that new windows will increase the value of your home and make it look more appealing to prospective buyers, who might otherwise be put off by damaged or outdated looking windows. 

Depending on your choice of materials and the type of windows you want to get, you could end up spending anywhere between £450 and £3,500 to replace a window in your home. 

How much you end up spending will depend largely on where you live in the UK, with the cost of labour rising in London and the South East by as much as 20% more on average. Prices range according to different materials and window styles, as well as window size. 

There are many benefits to renovating your windows: 

1. Reduce the amount of heat lost to the outside  

2. Lower your energy bills  

3. Keep your home warm in the winter  

4. Reduce your carbon footprint  

5. Reduces cold spots and draughts in your home 

6. Reduces condensation building up on your windows  

7. Insulate your home from outside noise  

How do I know when my windows need replacing? ↓

How do I know when my windows need replacing?

There are a few things that can flag that it’s time to replace your windows. These include: 

1. You can feel a draft  

2. Your window frames are chipped, feel soft, or look water damaged 

3. Condensation builds up 

4. Cracked windows  

5. You find it hard to open and close your windows or your windows are stuck shut 

6. Your home isn’t very soundproof  

7. Your carpets or furniture looks faded 

8. High energy bills  

9. Outdated style that could bring down the value of your property 

10. You still have single pane windows  

If any of these look familiar, it might be time to replace your windows. You can hire a skilled tradesperson to complete the job here.

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What is the average cost to replace windows? ↓

What is the average cost to replace windows?

The three most popular window replacement materials are aluminium, uPVC, and timber. Below are some prices for what replacement could cost you, depending on what type of windows you want. 

These prices include cost of materials and installation. 

Type of window	Aluminium + double glazing	Timber + double glazing	uPVC + double glazing
Casement window	£600 – £1,600	£700 – £1,880	£450 – £1,280
Sash window	£900 – £2,400	£1,000 – £2,800	£700 – £1,880
Bay window	£1,600 – £4,000	£1,800 – £3,600	£1,200 – £3,100
Tilt and turn window	£650 – £1,800	£800 – £2,100	£550 – £1,450

How much you spend will also be impacted by the size of your windows, with larger windows usually costing more to have installed. Windows on a second or third floor will cost more to replace than first floor windows. 

These prices include the disposal of your old window materials as well. 

Supply costs only for window materials can range from: 

• £250 – £500 for uPVC 
• £400 – £1,400 for wood 
• £400 – £900 for aluminium  

On average, a tradesperson will charge around £160 to £250 a day to install your windows. How much you end up spending on labour will be impacted by your location in the UK, and the number of windows you want replaced. 

You might get different rates for multiple window installations. 

You can ask for some free quotes on window replacements here:

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Is triple glazing more expensive? ↓ 

Is triple glazing more expensive?

Triple glazing is more expensive than double glazing, though it is a more effective insulator, meaning that triple glazed windows are more likely to reduce your energy bills in the long run. 

On average, you could pay between £2,200 and £3,800 to have 4 triple glazed casement windows installed. 

A skilled window fitter can help you decide whether triple glazing is a good option for you. You can hire a tradesperson here.

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How much does it cost to buy and install a skylight? ↓

How much does it cost to buy and install a skylight?

A new skylight or roof window could add a lot more natural light to your home, improving ventilation and helping you cut down on your energy bills. 

How much you spend installing a new skylight or velux window depends on the type of window you want, and the size you want it in. 

If you’re replacing your skylight because it’s damaged, a new one will cost you between £1,100 and £1,500. If the damage is less severe, a repair could cost you between £300 and £600, such as if your roof window leaks. 

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What is the average cost to repair windows? ↓

What is the average cost to repair windows?

Perhaps your window frames are in good condition, but the glass needs replacing, because the glass has smashed due to an accident or a burglary.  

The average cost to have a window repaired is between £100 and £250, depending on what type of window you have and its size. Where you live in the UK will also impact on costs. On the lower end, it could cost as little as £60 with a higher cost bracket of £300 to supply and install new window glass. 

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Can you replace windows without planning permission? ↓ 

Can you replace windows without planning permission?

You don’t usually need planning permission to replace windows, as long as: 

• The windows you are installing are of a similar appearance to those used to construct the house  

• Windows on an upper-floor side elevation have to be obscure-glazed and non-opening or no more than 1.7 metres above the floor level 
• You don’t live in a listed building or in a conservation area  

If you are only making minor changes, or are installing internal secondary glazing, you won’t typically need permission. 

If the window you are having installed is a roof skylight, different rules apply.  

For more information, access the Planning Portal website. 

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How to save money on replacement windows ↓ 

How to save money on replacement windows

The best thing you can do if you want to avoid spending more money than you bargained for on your replacement windows is to do some research, plan ahead, and set a budget. This will help you find the best options for you, filter through less good offers and quotes, and stay on track to spend as much as you are comfortable spending.  

On top of this, some other tips include: 

1. Get the job done at the right time. Window fitters are most in demand during the spring and are likely to raise prices during this period of the year due to high levels of work. Hiring labour during less busy periods of the year is likely to save you money. You are also more likely to find sales on materials during the slower seasons such as the winter and summer. 

2. Question whether you need triple glazing. Triple glazing is more expensive and depending on your home’s age and how well your property is insulated, triple glazing isn’t always necessary, as double glazing is more than enough to properly insulate your home and save you money on your energy bills. 

3. Have multiple windows installed at the same time. Window companies often offer better deals when you bulk buy materials, and you’ll get a better package deal from your tradespeople for multiple windows, than if you replaced them one at a time over the course of several years. 

4. Always ask for multiple quotes before you settle on your tradespeople. This will help you get a sense of how much your window renovation could cost you, and the upper and lower ranges for your project, so that you can make an informed decision about who you want to hire. And always hire skilled labour. This will avoid you having to pay more money down the line for repairs. 

5. Consider fixed windows over operable ones. These are cheaper to install, and if you already have good ventilation in other parts of your home, a few fixed windows could lower costs. 

If you’re thinking of getting your windows renovated, let us know what you have in mind, and get some free quotes today.

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Conclusions

Renovating your windows can improve the aesthetics of your home whilst decreasing your energy bills and helping you keep your home warm in the winter and cool in the summer. 

Regardless of whether you choose to go with double or triple glazing, A-rated glazing can significantly reduce your energy bills and carbon footprint. A-rated double-glazed windows for a semi-detached and gas heated property can save a homeowner £145 a year and 335kg of carbon dioxide. Over time, glazing will pay you back for the overall cost of installation. 

There are a range of prices for new windows, impacted by size, choice of design and materials, and where you live in the UK. 

If you’re thinking of getting new windows, let us know what you have in mind, and get some free quotes today.

*The Rated People cost guides are produced in collaboration with the quote-building platform PriceBuilder, and a range of tradespeople across the 30+ trades on our platform were consulted. Please note that the prices included are for guidance only – how much you end up spending will depend on the specific requirements of your project.

The post What are window replacement costs in 2025? appeared first on Rated People Blog.

Thinking of renovating your place or giving it a new look? Window design is an important finishing element of any home. Whether you are choosing wooden Victorian windows or a minimalist modern look, there are a variety of window designs to consider when deciding which style would be the perfect accent to your home.

Thinking of starting a new renovation project? Find design ideas in the Rated People Inspiration centre!

We’ve prepared a list of 7 top trending window design ideas below:

1. Slider windows

Are you looking for windows that will let natural light pour in? Slider windows open horizontally or vertically to create space in a room and allow fresh air to flow through. Slider windows are durable, cost-effective and low maintenance. They are the perfect addition to compact spaces.

2. Casement windows

Searching for a window to suit a modern home? Casement windows add natural ventilation to a room whilst also being aesthetically pleasing. There is plenty of variety to choose from because casement windows are customisable to suit your home with the addition of incorporating double-pane fibreglass framed for UV protection. 

3. Picture windows

Let stunning views of the outside into your home with windows that visually frame the outdoors. Adding a single pane of glass creates an unobstructed view of a picturesque forest or city skyline, should you have such a thing outside your window.

Find a professional and trusted window specialist by posting your job on Rated People.

4. Bay windows

Make a small room feel larger with bay windows that enhance the view and create space in your home. With the right planning and installation, a bay window can add a lot of value to your property.

5. Skylights

Adding a skylight into the ceiling of your home will not only bring the outdoors in, but it will also ensure privacy in rooms such as your bathroom or bedroom. You won’t need to compromise on storage space and can still achieve natural light.

6. Window walls

With the help of floor-to-ceiling windows, your home will automatically become an extension of the outdoors. Achieve a dramatic impact by amplifying the views of your landscape and maximising the light in your home.

7. Stained-glass windows

Add depth and character to your home with intricate and colourful stained-glass windows. You can easily create a feature window in your home without giving up on privacy and style.

If you are starting a home improvement project or want efficient window installation, find vetted and trustworthy tradespeople on Rated People.

The post Window design ideas and inspiration appeared first on Rated People Blog.

Better than a mince pie and more warming than a glass of mulled wine, a toasty, inviting house is the perfect way to greet your guests this winter. But too often pesky draughts, poor insulation and a constantly opening front door can make your home feel chilly. One way to keep it cosy all season long is by replacing your windows. That’s because windows are one of the largest areas of your home where heat escapes, losing up to 24%, according to MyGlazing.com. The reason could be worn seals, failed double-glazing or simply old windows.

Good reasons to replace your windows

Can you see condensation between panes of glass, spot cracks, chips or holes or feel a draught? Then your window is in need of some TLC. If it’s no longer under guarantee or can’t be easily repaired (e.g. a failed weather seal), replacing the window completely is the best solution. The main benefit will be substantially reduced heat loss, which will trim your energy bills. Discover how much upgrading your windows can help you save with MyGlazing.com’s Energy Savings Calculator.

New windows won’t just be more energy efficient. Many designs can help cut down noise from outside while specialist coatings or film reduce glare on days when the sun is low in the sky. All of which results in a comfier, quieter, warmer home. To find a design that best suits your home, talk to a window fitting expert about your options.

Image source: Evolutions Windows

Choosing the right windows

It’s worth getting to know some common terms before you buy.

1. Double-glazing

Double-glazing uses two panes of glass separated by a layer of trapped air to insulate more efficiently than a single pane of glass. If it’s finished with a reflective coating, it’ll be even more efficient, with a coating on the outside pane preventing the sun from overheating the room in the summer and an inside coating stopping infrared from leaving in the winter, keeping it warmer. There’s also the option of self-cleaning coatings on the exterior of your windows. These use sunlight and rain to keep the glass cleaner – great for awkwardly placed windows and busy lifestyles.

2. Triple-glazing

Triple-glazing is even more thermally efficient, at approx. 60% more than standard C-rated aluminium double-glazing and 40% more than an A-rated double-glazed window. This is because there are three panes for the heat to pass through before escaping outside and two layers of trapped air. The most energy efficient glass for triple glazing is called low emissivity (Low-E) glass, which lets light in but cuts down heat loss. The gap between the panes in efficient triple-glazing is also filled with an inert, non-toxic gas, which has a greater density than air, so this will further reduce heat loss.

3. Thermally broken

This term usually applies to aluminium windows. A barrier, which doesn’t conduct heat, separates the inner and outer frame of a window. This barrier material serves to stop heat conduction through the frame from your home to the outside and the cold moving in.

For all window types, check the window’s U value. The lower the number, the less heat will be transmitted through them and the better they’ll insulate your home.

Read more: how to choose new windows

Window configurations

There’s no need to buy like for like if you’re replacing so think about whether your current arrangement works as well as it could. For example, if you don’t use fanlight windows often, could they be swapped for one larger opener? Eliminating a fanlight’s extra frame allows more daylight into your home and may even prove more cost-effective. Similarly, aligning the openers on one side of your home makes the exterior of your home more balanced – great for boosting kerb appeal.

Image source: MyGlazing.com

Read more: replacing your windows

Adding extra style

The latest window colours and materials are ideal for adding personality to your home, with white UPVC being just one choice. As well as timber effects that are even more realistic, graphite grey is becoming increasingly popular for a sleek modern look, as well as a wide variety of other colours. Alternatively, the design of aluminium windows has evolved considerably in the last few years. Not only are they better insulated than ever before, they’re more suitable for sliding and folding glass doors as the frame won’t expand and contract as much as uPVC and timber. Aluminium’s also good for panoramic windows as it can support more weight. Low-maintenance and durable, slim aluminium frames also enable more light to flood into your home, which is a big plus during shorter days.

Image source: Reynaers at Home

For a window design that’s a little bit different, check out these round windows that look just as good on a house as on a boat.

The post Choosing new windows for a warmer home appeared first on Rated People Blog.

Those who are not lovers of modern architecture probably won’t have heard of Crittall, but most people will have seen some of their iconic design work. Known for their metal windows, divided into segments by a metal frame, Essex window manufacturer Crittall is the byword for the glazing that changed the face of our buildings from the 1930s to 1960s.

Their windows are on many famous buildings throughout the UK and Europe, including the Hoover building in London. They define modernism and art deco in Britain and have shaped the look of both the Metroland of Betjeman and the civic architecture of the post-war years.

Fashion, age and neglect has seen many of these windows replaced by more standard double-glazing units over the years, which is a real shame. This is the equivalent of ripping out Victorian fireplaces or ceiling roses. It changes the look of your home, but very rarely for the better. So many 1930s blocks end up with overly-wide white aluminium frames where there should be black, green or grey finished Crittalls. These homes also lose the curved glass that sat between many of the steel frames from the era.

Some homeowners are now looking to restore their original Crittall windows, whether via the business itself or salvage yards. If you wish to do the same then a good glazier or window-fitter should be able to help you with the details. But what should you do if you have Crittall or other metal windows that you want to keep and maintain.

Crittall themselves can advise on repairs and many window-fitters will be on their recommended lists or have experience of working with them. But caring for steel windows yourself is simple and it can make the windows last for a long time. The materials used should see them outlast any uPVC window frames, but taking care of the frames is vital to keep them in good shape and free from decay.

The most important thing with steel window frames of this type is to keep them clean and free of deposits of salt or pollution. So, once a year just wash them down using a mild detergent and warm water, before washing that off with just hot water. Use a soft brush to remove any debris. Use a metal touch-up paint to repair any areas that have become damaged or where paint has flaked. This approach is always advisable where you know you have factory-finished windows, rather than ones where paint has been applied on site.

Windows that were not powder-coated in the factory and that have been painted in situ will need extra care to ensure that all the moving parts are kept well-maintained and are free of paint. When you touch up or re-paint windows you add another layer, which can cause the windows to become hard to close or for the window to bow. For this reason, it is always best to strip paint away and clean debris using a wire brush before any new paint is applied. Your Crittall windows should last at least as long as you but they can become draughty or weakened if they are allowed to bow due to excessive paint.

Looking for the help of an expert to replace, repair or fit Crittall windows? Find a qualified and trusted Window Specialist on Rated People by posting your job.

The post Modernist Crittall windows appeared first on Rated People Blog.