PeterW Posted December 29, 2021 Posted December 29, 2021 18 hours ago, Buzz said: Another alternative would be to stay at 150mm and swap pir for eps , you will save some money on the insulation and can keep the same depth screed. But for a significant loss in performance and wouldn’t meet building regs. You need at least 250mm of EPS to replace 150mm of PIR
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