In the Seattle area, where I work, we get a lot of rain. From the mid-90s to the mid-2000s, there were many high-profile cases of water damage caused by improperly detailed siding, mostly on condos and other multifamily housing. Washington state now has some strict code requirements for siding systems in this housing category, but concern about water damage has filtered down into the single-family sector as well. Lately we've been seeing a lot of rainscreen siding, which is designed to allow wind-driven rain to drain from behind the siding and to promote rapid drying. Although conventional siding installations still probably outnumber rainscreens, I've seen them grow more popular every year since I installed my first rainscreen job in 2004.
On the project shown here, we used a variant of rainscreen siding that I have installed several times in the past few years. Called open-joint rainscreen, it's made up of siding courses that aren't overlapped or butted together in any way. Instead, they're deliberately spaced a fraction of an inch apart, which lets air circulate even more freely...
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