Right, evening all.
I have sufficient depth in my ground bearing slab build up for 260mm of insulation and need to achieve at least a u-value of 0.11w/m2k. To achieve this I was going to use a mix of PIR and EPS.
If I were to use the below, what overall u-value do I end up with?
100mm celotex (0.16)
160mm jablite (0.164)
(My P/A is 0.449)
Original plan was to go for 275mm EPS which would get me a u-value of 0.11, but now I've got a bit less to play with. I'd like to stick with that target u-value.
Head is full of petrol fumes after whackering and levelling all day so my mathematical skills are even worse than usual.
Another option I have would be to go for EPS100 instead of EPS70 but I have some 100mm celotex on site that I'de like to use up.
Thanks in advance.