Open-cell spray foam for flash & batt?
We are currently doing a green design review for a potential townhouse infill project in the Buffalo NY area. For the exterior wall the current assembly is brick, air space, tyvek, 3/8″ plywood, R-21 fiberglass batt foil-backed, 1/2″ gyp board, painted. We’re thinking of flash & batt of open cell spray foam and cellulose. (Not really flash and BATT, but not sure what to call it! Flash & Stuff?) Our reasoning is that the open cell has some ability to allow moisture to move to the exterior but provides air sealing. We would like to use a combination to minimize the amount of spray foam from a sustainability aspect. Thoughts? Thanks!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part