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Can see daylight from gap at floor level in b...

Posted by Kate Edgar, on
Re: 1934 bungalow - rear bedroom decorated, walls skimmed and new skirts. Waiting for scotia to be fitted to seal gap between floor (10mm gap left) and skirts. When looking through this gap at floor level realised I could see daylight coming straight through from the external air brick in the outer leaf of the cavity wall. This is causing a draught into that corner of the bedroom which might be ok now but won't be in winter (and could explain why thermal imaging shows this as a cold spot). The same applies to the airbrick 2 meters along. Had raised moisture level readings in these corners of the bedroom walls but eventually gave up trying to find the cause. The airbricks appear to be venting into the cavity wall (no insulation currently) gap and below - possibly sub floor (i.e. timber frame bungalow). Can't move the airbricks but is there anything I can get to duct/redirect the air (coming in from the airbricks) to under the floorboards and between the joists ? Am I right that the air flow should be going below the floorboards? Am I right to be worried in that this could cause serious damp issues. Although the gaps will seen be sealed, due to the constant hammering with winter draughts it is just a temporary fix and I will soon be faced with a more serious damp problem. Is this right? And if so what can I do? Would be glad of any advice at all and thanks a lot in advance.

Bubbling vinyl on newly levelled floor

Posted by Samantha , on
Less than a year ago I had 3 rooms knocked into 1. The floors were different levels and mostly tiled. Part of the job was to level the floors. The builder did this and found a concreted over manhole. During works they had to move the waste pipe so uncovered the manhole. They concreted the whole floor then put a latex floor over the top and vinyl flooring. A few months after the flooring started to bubble up, significantly concentrated over the area where the manhole is. The bubbling got bigger and has spread and the floor needs replacing. I’ve been asking my builder and the floor supplier to come and remedy it for months to no avail. In my hours of googling I have learnt that when you latex over concrete the concrete should be left to dry before the latex for 7-14 days. Looking back at photos of the build they only left 4 days inbetween. I can’t find what the consequences are of not letting the concrete dry properly are? Could it have caused cracks in the concrete & now gases are leaking up from the manhole and warping the flooring? I’ve put a methane detector under the flooring but didn’t get a reading. Also the problem is very much concentrated in 1 quadrant of the floor though it is gradually spreading outwards. There is one quadrant that is wooden underneath the rest concrete, 2 of the concrete quadrants are what the builder did whilst levelling the floors, 1 was pre-existing concrete. If anyone can offer advice or recommendations for how I can get what’s gone wrong clarified & remedied I’d be very grateful!
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