We built our log home in Idaho in 1980 from lodge pole pine that we cut and stripped ourselves cut flat on 2 sides we sprayed Never Rot on all the logs before building. Put fiberglass insulation between each layer. Been treated with CWF and then Hydralic oil.
Pressure washed this summer to get crud and oil off outside. Sanded it treated with Sun Frog sealer then caulked. Noticed fine dark brown powder coming from between log by window on North side. Any ideas what it could be.

waterloop Changed status to publish April 9, 2024