Does it make sence to combine exterior ridgid ins with flash and batt?
I’m in zone 7 (southern Ontario, Ottawa) building new. I had been planning to install 1 1/2″ rigid foam to benefit from bridging the studs. For the wall cavity I’m considering DIY flash and batt. Assy in to out- 1/2″ sheetrock, no poly, fiberglass batt, 2X6 stud, 1″ closed cell spray foam, 7/16 OSB, 1 1/2″ ridged foam, 3/8 vertical strip firing, cement board siding. Does this arrangement make sense or would I be better off to forget about the exterior foam and spend that money on filling the stud cavities with closed cell foam? The house is roof tite now. Any feedback would be much appreciated. thanks, Mark
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