Advice on underfloor heating

realslyshady

Thanks camptownraces — that's basically what I'm trying to find out here! Really keen to make sure we do this right and get a longterm replacement for the current rotten floor.

Tom99

realslyshady wrote: »

Thanks for the advice, folks!

Might be doing my builder a disservice — he suggested tanking as an option when I was set on repairing the suspended floor. Have since come round to his first suggestion that we build up void with hardcore/insulation/UFH/screed. I'll look into the tanking — we know there's a damp problem, and I'm hoping the opportunity to put in a new floor is also a chance to put it right. Advice on this also welcome!

Any thoughts on points 1, 2 & 3?

Where is the damp? When you mentioned tanking I assumed it was the walls. Replacing the floor will not cure any damp in the walls. Tanking is usually confined to basements and wet rooms.

realslyshady

Hi Tom99 — the damp is in the floor and walls at one particular corner where a downspout has been misaligned for what seems to be about 30 years or so. A concrete yard outside doesn't seem to be helping much. There's terrible decay in the room, with damp spreading across the timbers and two corner walls. The plaster is a paste, the window timbers shot, the floorboards and joists riddled.