DIY_ME_UP

Thank you the issue I have is on the warm roof side there is a small pitch coming down to it from the ridge (approx 500mm) before the warm roof starts. This itself won't need insulating as its above ceiling level or do I put insulation between ceiling and the bottom of the flat roof to create a barrier as such? Where the warm roof starts how do I prevent this air passing into the cold space and visa versa? I know the design is poor but I am committed in now and need to find a solution.

Hi, Our front pitched roof is a cold roof. 140mm between, 40mm over and 50mm air gap to ceiling height. The ceiling joists run from dormer wall to the pitched side. Dormer roof is a warm roof construction. Question is above the ceiling what would you use to fill between ceiling joists and where do you stop? Just short of where the warm roof starts? If cold air gets beneath the warm roof will this make it ineffective?

Having a loft conversion done, we parted ways with our builder before Christmas due to poor work. New chippy has got us up to the stage we are now at, I am trying to finish off insulating myself. Front roof is pitched, 140mm between and 40mm over with 50mm air gap. Runs up to the ceiling rafters. The large box dormer roof is flat and runs full length with warm construction. I am struggling to figure out how I insulate the ceiling space and how to end it where the warm roof starts? Any help is appreciated. There is a small pitch which leads down onto the flat roof about 4 tiles worth.