Wall assembly
KrisCurrie
| Posted in Energy Efficiency and Durability on
I posted about wall construction last winter, building in Atlantic Canada. Wondering about WRB’s and the best ($) interior smart vapor to use? 2×6 oc framing with 1/2″ plywood taped for air barrier, 4″ eps, furring stripes then vynil siding. Will I be ok with regular tyvek on the exterior of the plywood? Should I use certianteed, intello or db +? Thanks Kris
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Replies
Kris,
Tyvek will work fine as a WRB. Careful installation matters more than the brand of housewrap you choose.
Your wall assembly has no need for an interior smart vapor retarder. The smart vapor retarder is only being installed to keep your building inspector from harassing you. Buy the cheapest one you can find, because it is unnecessary. (If you can get away without installing it at all, that's the cheapest way to go.)
Kris,
It might be worth comparing the cost difference between regular and commercial Tyvek. The commercial grade is a lot more robust making it easier to install without tears or punctures.
Thanks for the info!