Mold on exterior cladding and decking
I’ve recently visited a holiday cabin we finished last summer. Unfortunately I’ve discovered a lot of what appears to be surface mold on various surfaces on the exterior of the building. There are lots of articles here on GBA regarding interior mold/sheathing mold etc but I couldn’t find anything on this topic.
There is Cedar T&G cladding treated with Osmo UV and locally milled 4×10 Douglas Fir beams treated with the same product, both showing significant mold. This product was chosen to maintain the natural wood colour.
In addition the Cedar decking, posts and stringers also have significant mold growth. These surfaces have been treated with Sansin Wood Sealer to provide some protection while allowing the wood to ‘silver’ naturally.
Climate 4C – specifically Sunshine Coast of BC, Canada
Is there anything I can/should do to prevent this?
Any product suggestions for cleaning the surfacing without damaging them?
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