Taped sheathing joints with primary air barrier on the interior
Hi folks! Long time lurker here but first time poster. I’m hoping to get a little feedback on air control for a wall design in PEI, Canada (Climate zone 6). The wall stack up is
Intello Plus Smart Membrane (interior vapour control is required by code here)
2×6 wall cavity with dense packed cellulose
1/2 plywood sheathing
3″ Rockwool Comfortboard
With a vapour control membrane required on the inside, Intello seemed like a logical approach since it would also act as my barrier with proper detailing. I’m wondering if it would be worth also taping the seams of my sheathing to form a secondary air barrier on the exterior side of the wall. It wouldn’t be a huge expense and I’m leaning toward doing it, but if this is simply redundant with an interior air barrier already, then maybe my efforts are better placed elsewhere. My WRB will be mechanically fastened and will really only be relied upon for water control.
Any input would be greatly appreciated!
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