Now May 29th without being able to access the series. This is frustrating
cannot find the series, disappointing
I am sorry, I forgot to ask if you left an air gap between the underside of your roof and the polyiso board for venting.
This is similar to how I installed. What type of facer was on the polyiso board you used. The first batch I had was aluminum and second was fiberglass paper.
What method did you find works best in cutting foam to fit in between the rafters?
I hope this is the right place to ask this question. I am finishing a third floor of a two and a half story house. I have 2x10 rafters. I have at my disposal four inch polyiso board with the foil facing. My plan was to rip one inch strips of wood to put on the back of the roof decking then cut the polyiso board to fit in between the rafters leaving one inch gap for ventilation as well as a 1/4 inch gap on either side to seal after installation. I was going to double up the polyiso board for a total of eight inches. Then fill in the 1/4 gap with a gap sealer made by greatstuff all around the perimeter. In the end I would have the foil facing the air gap for ventilation on the outside and I would also have foil facing the conditioned space on the inside. Any questions or concerns would be much appreciated.
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