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A friend sent me these photos last week of the dry verge system in a new roof installation. Does it look OK?

Hi, I've come across this white mouldy-looking substance in the loft of a friend . Anyone know what it might be and whether it's something to worry about?

Advice sought. We are putting Venetian blinds up on kitchen window. The surround is uPVC. The wall is completely hollow , so a normal rawlplug won't work. Anyone know if those "hollow wall fixings" used for fixing things to plasterboard would work? I'm not sure if the uPVC will be strong enough...

I have removed a built-in cupboard in my house (ex-local authority, built late 1940s). The floor is covered in a soot-like brown powder/dust type of substance.. The floor is concrete with vinyl thermoplastic tiles on top. However, there are not tiles underneath the cupboard. Can anyone advise...

I'm considering having my loft converted. The roof has quite a high pitch. Part of the roof sticks out from the main roof - it sort of looks like a huge dormer window - but it's not really accessible when you are in the loft because there are lots of beams or trusses in it. I'd just like some...

Thanks for this, newboy - it's certainly one of the things I was concerned about. I had, though, come round to thinking that if the words 'FI' and 'GLASS' seem to be written on the bags then that does strongly suggest that it will be fibreglass - what do you think?

I've managed to unearth a bit more and the word 'GLASS' is definitely there!

LOL - I see what you mean! That would make sense.

JohnD, I tried burning a sample with a match and, to be honest, not a lot happened. It didn't really catch fire, though a little bit went a grayish colour.

Thank you for your reply - I've also noticed the letters 'FI....' on another bag (but I can't see what comes after that). The insulation will have been up there for at least 20 years, could be much longer. Obviously, I'm just concerned it's not something dangerous like asbestos.

Hi, I found what I take to be insulation material in my loft. It's a white material in long threads. Looks like it was originally in black paper bags (marked ASS and I can also see 'FI...' written on another part of a bag). Anybody know what the material might be? Thanks.

Hi, there is a patch of concrete on our bathroom floor that is always damp. I've dried it off several times, but the dampness reappears. I can't find a leak anywhere in the vicinity. There may have been a leak in the past from the sink, but could that still cause the patch of concrete to be...