Probing for rot and swelling
Peeling wood siding can usually be repaired and repainted, but only after every soft or swollen board is found and replaced, because paint laid over decayed wood lets go again almost as soon as it dries. Wood rots when it stays wet: decay fungi need moisture above the fibre saturation point to take hold, so the damage collects wherever water sits.
- The bottom course, closest to soil, mulch and sprinkler spray.
- Under window sills and at the ends of boards that butt into trim.
- Below gutters that overflow and behind downspouts.
- At lap joints where old caulk has split and let rain run behind the board.
We press an awl into suspect spots on every course, not just the ones that look bad. Sound wood resists the point; decayed wood lets it sink in or crumble. Every soft section is marked, photographed and written into the scope with its board count, so you see exactly what is being replaced before we cut anything.
If the house was built before 1978, the old paint is tested before any scraping or sanding. Federal rules for homes of that age call for lead-safe work practices whenever painted surfaces are disturbed, so we contain the work area, keep dust down and clean up with HEPA equipment when the test calls for it.