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Ree, thanks for your reply. Here’s the answers to your helpful points: 1. No. see next point. 2. Yes, 200mm Rock Wool inserted between joists, above ceilings and below OSB boards. 3. No vapour barrier 4. The ‘roof outlet’ was the existing system. Awaiting fitting of cover and leaf...

Hello We’ve recently been having a replacement flat roof put on, removing all old felt, under-boards and fascias and replaced with new 18mm OSB and 2 layers of high tensile torch-on felt applied. The process was held up for a number of days due to rain and damp weather. on one day the...