Exterior Electrical- Arlington Box Flashing
I’m looking for some advice on flashing/water prevention measures on an exterior electrical outlet with rainscreen. It’s B&B siding. I see plenty of way to flash the box or wire penetration to the WRB, but the siding to box bit is where I lose it.
If one takes the Arlington INbox approach, and uses the box for foam assemblies (see image) it appears the box protrudes through the siding. So how would one weather seal that protrusion? Just silicon/sealant between the box and siding?
I know folks regally mention mounting blocks (and flashing the mounting block) but in the case of the Arlington one-piece box, there would still be that gap between the mounting block and box. Just seal it?
The other approach: If I use a separate electrical box and cover, should the gasket seal against the siding/mounting block, or the electrical box face itself? My understanding is the seal is made against the siding, but then there’s a gap between the electrical box and the cover immediately behind the face of the siding. It seems that gap is just waiting for water to enter if it makes it past the siding seal? (And with rough hemlock siding, I am reluctant to trust that seal over time). Am I missing something here
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