To vent or not to vent the attic? (New construction)
I am building a new home that will have a conditioned crawl space in which the air-handling equipment and all ductwork will be located. I plan on tightly air-sealing my ceiling (likely with a 1-2″ of spray foam as a sealant). I’ll then insulate the ceiling with cellulose insulation which exceeds the 2012 IRC requirement for my climate zone (Zone 3, northeast Texas – R-38 required, likely will shoot for at least R-50).
The Texas summers here are hot, and regardless of whether I vent or not vent, the attic temperature will be high. That’s fine with me – I won’t be using the attic for storage or other purposes. Venting the attic would seem to accomplish little other than allowing humidity into the attic – an obvious undesirable result.
Am I correct in thinking that I could NOT vent the attic, seal and insulate the ceiling, and not condition the closed attic space? If I am not correct, what is the reasoning behind venting it?
I apologize for what appears to be some duplication with other posts, but I’m not sure that anyone has addressed this particular situation of not venting AND not conditioning the attic.
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