Simon Posted January 6, 2014 Share Posted January 6, 2014 Finally getting round to insulating the rear rooms of my renovation, the walls are already sorted, but the roof is a simple terracota with roofing felt affair. I have 80mm rafters that I intend to expand to 130mm and then pose 80mm PIR between then completing the ceiling with 25 - 40mm PIR backed plasterboard.The local builders merchant has a good choice of polystyrene (XPS in the main), but I cannot find PIR. Does anyone have an opinion on PIR vs Polystyrene perfromance, and where can I find PIR in France without paying an arm and a leg? eBay UK has some real bargains and I am prepared to ship if necessary.RegardsSimon Link to comment Share on other sites More sharing options...
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