Wednesday, November 10, 2010
I can report now the house looks exactly the same, even the experimental patch I had scrubbed with a toothbrush and undiluted solution.
This doesn't necessarily mean our work was a failure, though. We could well have killed the fungus, and only the discoloration remains. I looked at the wood very closely, and the dark spots just seem to be colored in, almost as if it had been stained. There's no obvious coating or growth of any kind.
Janne told us about the paint he's using on the stuga he and Tony are building. It comes in two parts, first a primer which is thin and is absorbed by the wood to seal it. The color coat goes over the primer and is very thick and long-wearing, lasting 15 years, according to Janne.
So we've decided to paint, probably next summer. In addition to covering the dark blotches, I think the wood needs to be sealed better; there were a few wet spots inside after I hosed the house in September. This product should do the trick.
However, Rutger is worried about inadvertently painting over live fungus, and sealing in a bigger problem. I can see his point. When I'm out to the house at Christmas, I'll pry off a dark sliver and see if I can take it for analysis, just to be sure we're doing the right thing.
That leaves us for the colour choice, but I'll leave that for another blog post!