There is one more step to save costs -Placing insulation board
By placing a thin layer of thermal insulation underneath the heating mat, it can prevent heat loss downwards, which speeds up the warm-up time and minimises heat loss.
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XPS insulation boards are designed specifically for use with electric underfloor heating systems, very high compressive strength (30 tonnes / m2), lightweight, high efficiency, and low cost make this thermal board an ideal choice when fitting heating on to a poorly insulated concrete or screed base and works excellently with underfloor heating underwood and under tile systems. Insulation boards come with a 50-year warranty.
Tile backer insulation boards provide first-class heat insulation for underfloor heating and superb waterproof surface to afix tiles. The XPS (Extruded Polystyrene) the board is coated with a reinforced cement-based flexible mortar ensuring the easiest of fitting and tiling.
Perfect for wooden/subfloors on top of joists
Size - 1200mm x 600mm (0.72m²)
Available in 6mm and 10mm thickness
XPS insulation board is sandwiched between reinforced cement