jimmy_s
Established Member
Personally I would try and get some form of cavity - could you not core cut a few vents in at low level?
Also its better not to put all the insulation in between the rafters general rule is half between and rest under as the rafter is a cold bridge but might be ok.
I have to go out but if you want to PM me the build ups I can run the interstitial calcs for you as thankfully I dont have to do them manually anymore.
I'm an engineer not an architect so others here may be able to advise better on build ups but I'll try and give you a hand
Jimmy
Also its better not to put all the insulation in between the rafters general rule is half between and rest under as the rafter is a cold bridge but might be ok.
I have to go out but if you want to PM me the build ups I can run the interstitial calcs for you as thankfully I dont have to do them manually anymore.
I'm an engineer not an architect so others here may be able to advise better on build ups but I'll try and give you a hand
Jimmy