What is the best way to manage moisture in a cinder block building in a hot, humid climate?
Having rebuilt my tiny bargeboard shotgun house in New Orleans, I now wish to turn my attention to the garage. Unlike the house itself, which has a pier foundation and a wood frame, the garage is a cinder block building on a concrete slab.
My overall goal is to make the garage a functional workshop and to add a second floor or at least a mezzanine level to provide a place to store guests. In terms of “raising the rood,” my notion is to build a wooden balloon frame inside the existing cinder block building, rather than trying to reinforce the cinder block to make it able to support 2x the existing wall height. The existing leaky asbestos shingle roof will be replaced with a metal roof.
As y’all know, down here we struggle with things like water, mold, and termites. So as I think about building a wood frame inside my garage–and perhaps cladding that frame with plywood and/or pegboard, I want to be very sure that I am going about it in a way that will decrease my chances of mold and termite damage.
My initial thoughts would be to paint on a waterproof sealant on both the interior and exterior sides of the cinder block shell, then do my internal wood frame like a rainscreen, making sure there’s an airspace with openings at top and bottom for moist air to escape.
Am I way off base yet?
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