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spray foam closed cell Post New Topic | Post Reply
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Bruce Watson
Posted: Sep 19, 2024 06:38 PM
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spray foam closed cell
My roof/ceiling is 2 x 10" rafters@ 24"inches OC. Nothing above except the uninstalled plywood. Face nailed to the bottom of each rafter is 2 x 10 inch tongue and groove douglas fir. The rafter space should be a non vented roof structure. A. Can I still achieve this by spraying from above and then nailing the roof plywood over it?B. If not, can I spray the R-30/5 inches insulation and then create a 4-1/2" airspace above the sprayfoam? Drill holes and add screen to all exterior rafter blocking, and find a way to vent the ridge of my low slope roof? Id rather do A. and keep the non vented roof structure. Wish I could email a picture or two. Thanks |
