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uPVC Windows & Door specialists - what you need to know

UPVC doors and windows aren’t just affordable and efficient – modern systems look great too. Available in a variety of sizes and colours, you’ll usually be able to find a model to suit any style or type of home.

The process to install a UPVC window or door is a fairly straightforward one, but to get a correct fit that performs to the required thermal efficiency standards it’s best to use a professional. They’ll be able to safely remove an old window or door (including the frame), and then secure the new sill followed by the frame. Finally, the sealed glass window or door pane units can be installed into the frame.

When you’re looking for a tradesperson to fit your UPVC window or door, make sure they hold FENSA accreditation. FENSA is the organisation responsible for regulating double glazing sales and installation, and most UPVC window or door installation experts should hold this registration.

Cost of UPVC window or door installation

UPVC window and door fitting costs vary according to the size and spec of those you’re seeking to have installed.

Typical installation and supply costs range from:

• £200 for a small basic single window, up to £600 for larger units and those with specific stylistic features, like sash windows.
• £400 for a basic half-glazed single door, up to many thousands (typically around £4,000) for multi-door bi-folding models.

What is a UPVC window or door?

The terms UPVC windows or doors and double glazing are used interchangeably. But UPVC simply refers to the material that the window or door frame is constructed from. UPVC (or “unplasticised polyvinyl chloride” to use its full name) is built to withstand all weather conditions, without the maintenance requirements of timber frames.

Double-glazed windows or doors are sealed glass units, featuring two panes of glass separated by a spacer filled with silica crystals. These crystals do an important job – they soak up any moisture and keep the gap between the two glass panes clear. Double-glazed windows will usually come with a 10-year guarantee, giving you peace of mind that your money is being well spent.

How to install a UPVC window or door

Whether it’s a window or a door, your professional will usually follow a similar process when fitting a new UPVC unit.

They’ll begin by removing the old window or door frame, including any remaining mortar or sealant. A clear area will help to ensure the best fit possible. The sill then needs to be fitted to the brickwork, to hold the window or door frame. This must be done with care and precision, and your tradesperson can use packers to make sure the sill is level. During this phase, they’ll also need to ensure they’ve allowed for drainage holes at the bottom of the frame.

With the sill fitted, the frame can then be secured. A pilot hole should be drilled through the frame towards the brickwork, with a larger hole to follow. Fix using the supplied screws, taking care not to overtighten and pull the frame. Once again, packers can be used here to help the frame sit level and ensure it’s ready to receive the glazed window or door unit.

Once the window or door is installed, your tradesperson will complete the installation by toe and heeling it – essentially ensuring the fit is perfect and preventing any issues with heat-induced warping or contraction in the future.

The qualifications your UPVC window or door installer needs

Be sure that your tradesperson holds FENSA certification. As outlined above, FENSA regulates the double-glazing sector and ensures only compliant, competent professionals are carrying out work on your home.

Beyond FENSA accreditation, make sure your professional can provide a number of customer references and examples to show you previous UPVC window and door installation projects.

Planning permission for UPVC window or door installation

Planning permission for installing a new UPVC window or door won’t be necessary usually. The only exception might be if you live in a listed building, or an area of outstanding natural beauty.

Insurance for UPVC window or door installation

If your tradesperson is also supplying your windows and doors, be sure to check that the units carry at least a 10-year warranty.

You’ll also want to confirm the tradesperson (or their company) holds full public liability cover. While UPVC window and door installation will only involve a small amount of work on your property, there’s always the potential for things to wrong. So, make sure you’re covered and get proof that public liability insurance is in place.

Questions you should ask your UPVC window or door installer

• Are they registered with FENSA?
• Can they supply and fit your window or door?
• Do they have examples of windows or doors they’ve installed previously?
• Can they provide a warranty on their work?