Warp-up Underfloor heating guide?

tony58_3

hi, i'm stuck
i bought some warkup underfloor electric heating for the bathroom, its going underneath trevertine natural stone tiles.

the bathroom is on the 1st floor, subfloor is wooden floorboards.

what is the correct procedure to install the heating??

it says in the manual that i need
1st, plywood, on the floorboards, then primar it,
2nd, lay some insullation boards,
3rd, then the floor heating
4th, then adhesive and tiles.

so i went to BnQ to get some insullation boards, the boards i got look like they will break very easily over time, they are called Aquapanel Thermal Cement Insulation Board

http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=9273199&fh_view_size=10&fh_location=//catal!!!1/en_GB&fh_search=instulation+board&fh_eds=ß&fh_refview=search&ts=1275043651439&isSearch=true

is the right stuff so heat dont travel down??

Thanks

sillygoose

I am just finishing a conservatory with a system. The insulation boards in B&Q looked crap to me when I have examined them for the price. Wickes do some too but don't know if they are any better.

Marmox are possibly the leading brand in this market and mine went down great there is no give in them at all, supposed to be able to take 30 tonnes per metre square! not expensive but unless there is a local stockist you may have to mail order which isn't so bad as they are not heavy and packed in boxes. Once you lay the insulation boards you should use mesh tape over the joints (B&Q or Wickes sell it) and use a primer, a coat of pva pretty much so the heating mat sticks to the board cement face well.

MinMoz

I have exactly the same set-up in my house. Warm-up under floor heating and on top travertine tiles. I didnt bother with insulation board (I must have missed that instruction in the manual!).

Works very well - am extremely happy with it. Would be a very cold floor without it.