What are the best Wall and Roof insulation choices and rain screen?
...Roof will be done from PVC (flat roof) with hot glued seams with firestone bp coinsulation outside and Intello+ WRB from inside with likely foam of rockwool in between.
Am I overdoing it or not doing it properly? Would it give me good level of airtightness in your opinion? Any recommendations for rainscreen?
Thanks in...