Spray foam the ceiling joists vs. the back of the roof sheathing?
Is there ever a time when an attic space is so large that it is better to spray the ceiling joists rather the backing of the roof sheathing?
(No cathedral or vaulted ceilings…)
The home is ~6000 sq ft under roof (including garages) the builder is thinking that it is better to spray the ceiling joist since the attic space is so large.
(There are areas were the ridge row is ~15+ ft above the ceiling joists.)
His logic is why do I want to cool the attic and that my electric bill will be higher since I’m heating/cooling a larger area.
I feel he is missing the advantages of the HVAC not working as hard since you don’t have the extreme heat/cold in the attic…
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