Its foil backed insulation sheeting on a roll. Also, have been told I need to add some flexible something to the screed to stop any cracking of the tiling afterwards. Does anyone know what it is called.
2007-10-30 01:31:39 · 8 answers · asked by londongate11 3 in Home & Garden ➔ Do It Yourself (DIY)
The foil back insulation you describe sounds like Trilso Super 10 or Thinsulex, But are used for roof insulation. Sounds like you are running the underfloor heating from your central heating system. Lay 75mm Celotex / Kingspan insulation boards on to your concrete sub floor. Then lay pipe and floor panel followed by a 70mm screed.
2007-10-30 11:50:14 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Celotex is in solid sheets, not on a roll.
You don't want to be putting that under a concrete floor.
It sounds like you are trying to create a floating floor, you can buy polystyrene specifically for underfloor insulation. This is needed for new floors for building regs, not just for heated floors.
If you have an existing solid floor you can get heat resistant tiles to go under the element - they deflect all the heat upwards.
Normal self-levelling screen works fine. Leave the elements turned off until the screen is completely dried out - a couple of weeks or more.
Test electrical continutity and earth readings before you commit to laying the concrete.
2007-10-30 04:00:44 · answer #2 · answered by Michael H 7 · 1⤊ 0⤋
Underfloor central heating?
I used 75mm polystyrene flooring insulation sheets. One on top of the other = total thickness 150mm.
I did this about 10 years ago before any purpose made products were available in the UK.
I build a wooden frame with pipe clips attached to hold the plastic pipe in position and cemented around it (week cement mix), then removed the timber frame before laying another layer of concrete.
Still works great. Cost very little.
2007-10-30 15:29:31 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I have seen the rolls sitting on wires attached to the floor joists. They do make a wire "clip" that is tapped into the joists to hold the insulation up. If you use insulation with the vapor barrier, the barrier goes to the floor side. Vapor barriers always go to the heated side of the structure. If you install a barrier on the cold side (bottom of the joists) you will find running water later. I had this when I moved into my current house. I removed it and also laid 6 mil plastic sheeting on the bare ground in the crawl space.
2016-03-13 11:44:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Reinfircing Mesh You will want something reflective under the heating I'd think some 1/2" to 1" thick Celotex (in 4'x8' sheets) would be more than sufficient
2007-10-30 02:55:39 · answer #5 · answered by mdlbldrmatt135 4 · 0⤊ 1⤋
the sheets are celotex ..they are 8 by 4 sheets ..its not on a roll ...can buy various thicknesses ....the thing you need in the screed is called fibres ..stops cracking ..look in yellow pages for celotex under insulation
2007-10-30 05:34:01 · answer #6 · answered by boy boy 7 · 1⤊ 0⤋
Seletex
2016-12-17 17:37:49 · answer #7 · answered by gillerist 4 · 0⤊ 0⤋
american store called "wicks" you will get it all there as they sell underfloor heating
2007-10-30 08:15:04 · answer #8 · answered by Anonymous · 0⤊ 0⤋