I want to add my roof insulation to the top of my 4/12 cathedral roof
I want to add my roof insulation to the top of my 4/12 cathedral roof, but to get my R-value, I have 15” I want to secure.
I have it at a great price, but will it be feasible? Or how do I do this?
It’s a 4/12 roof and I hope that putting the foam on top which is already sealed with a peel and stick then the foam which we plan in staggering and taping seams, then attach with screws. We are still costing everything but the foam is inexpensive and the screws aren’t.
Yet is this feasible to even do before I start planning and go further? We hope to have R-60 which won’t be possible without 10” of spray foam at we believe will be twice the price.