just checking

[lucius]

Got a kitchen floor to do,300by600 rectified black porc, its on 3by 2 joists sat straight on concrete floor so no deflection, chipboard with UFH, going to cover floor with 6mm cement board screwed and stuck with sutible addy,does anyone know anything else i should be looking out for?

[andy8758]

Lucius. It is well worth phoning the under floor heating manufacturer to check about use of their heating system on chipboard - them may suggest a minimum expansion gap between the chipboards, and they will almost certainly recommend use of minimum 10mm thick backer board between heating cable/mat and flooring wood. It never hurts to double check - there are so many different manufacturers giving differing advice on UFH nowadays.

[lucius]

Cheers Andy, know what you are saying a lot of them will tell you anything just to buy the product, this system is actualy wet, Hep20 on the reflective sheets so i dont see a problem.

[nybor62]

have you insulated between the joists to stop downward transmission of the heat,is this the one that as conductor plates over the top

[lucius]

Yes and yes.

[lucius]

Also these porcs are mat normaly seal before grouting in Topps yesterday only had sealer for polished porc? sorry for silly question but been out of the country for a while.