What problems do wood decks and fences have here?
Most outdoor wood in this area is pressure-treated southern yellow pine, with some cedar and composite boards. Pressure-treated wood resists rot, but it does not resist surface mildew. The usual issues are:
- Green and black mildew on boards that stay damp, especially in shade or near a pool or lake.
- Gray weathering on boards that get strong sun.
- Slippery algae on steps and low boards, which is a real safety issue.
- Tannin staining from oak leaves left lying on the deck.
- Old stain or paint that has flaked and left patchy areas.
Cleaning cannot fix rot, loose fasteners or cracked boards. If a board is soft, a screwdriver pushed in will tell you. Replace those boards first, and a good crew will tell you when they see them.

