Roof sheathing in the PNW
Here in the damp PNW roof sheathing on well ventilated and air-sealed free-framed and trussed roofs often exhibits some discolouration especially on the north side. It is seldom serious, but it does indicate the sheathing is damp enough to sustain a small amount of mold growth for a large part of the year.
I remember this problem came up in a discussion with Kota Ueno of BSC at some point. I wonder if their research lead to any interesting solutions?
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