Most deck stains fail because they were applied before the wood was ready. Moisture trapped under a fresh stain turns into steam on the first warm day, blows the stain off the surface, and the cycle starts over.
Step 1 — Strip or clean
If the old stain is peeling, it's coming off — chemical stripping plus sanding to sound wood. If the deck has just grayed from UV but no active failure, a wood brightener and light sanding is enough.
Step 2 — Sand to fresh grain
60- or 80-grit on a floor sander for horizontals, hand-sanding for railings. Sanded wood drinks stain evenly; cleaned-only wood takes it blotchy.
Step 3 — Moisture check
A handheld moisture meter should read below 15% before stain goes on. In Massachusetts fall, that often means 48 hours of dry weather after the clean/sand. We check before starting — guessing costs more in re-work.
Step 4 — Product choice
For pressure-treated and cedar, we specify penetrating stain: Benjamin Moore Arborcoat Semi-Transparent, SW SuperDeck, or Cabot Australian Timber Oil. These soak in rather than sit on top — no peeling, just gradual fade that you refresh in 2–3 years.
What we avoid
Solid deck paint on pressure-treated wood with no history of paint. It looks beautiful on day one, peels within two winters. Only viable on already-painted or composite decks with full prep.