Wall Assembly for Marine Climate
Can anyone point me to some proven wall details for a very exposed wall in a marine environment? The plan is to use metal panels or cement siding. Probably metal panels, but flexible.
From the exterior of the studs the construction is currently:
studs, gypsum fire board, woven rain barrier, plywood, residential tyvek, 4×8 cement panels, paint.
A siding contractor added the tyvek and 4×8 cement panels on top of the plywood siding.
The wall has a significant stack effect. Rough plan is to demo exterior to the studs, air seal, re-insulate, new fire board, new plywood, potentially an inch of closed cell over the plywood, then siding.
I’m looking for a proven method for a very exposed marine environment that alternates frequently from fog to sun, creating a lot of vapor in materials storing moisture.
My main area of concern is the detailing for a potential rain screen to promote drying and if the 1″ closed cell makes sense over that. My priority is promote drying, but would like to insulate on the exterior to avoid any cavity condensation.
Any innovative product suggestions are appreciated, especially anything that combines the fire rating of the gypsum board with insulation.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part