runninwata
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Sorry,
I should have given more information, The house is built to a high degree of airtight standards using a valutherm kit,
airtightness so far achieved around 1.8,
Therefore we are installing an genvex premium MVHR and a vanvex cylinder, The main heat source is from the Genvex system but the underfloor heating will be on constant to warm the floor and provide the necessary extra heat required in the winter months,
so I suppose based on the comments above
if I dont use the backer board it will take ages to heat up but will retain the heat in the slab longer
and If i use the backer board the tiling will heat up a lot quicker but once switched off it will lose the heat quicker?
It is our intention to keep it on full time in any case, we are installing 4kw of PV Panels to compensate for the electricity being used in the build
Thoughts??
and If I go down the backer board route does anybody know where I can get larger sheets approx 100m2 of floor area to cover!
Thanks
Steve
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