About deck staining & sealing
Stain is what keeps a deck from going grey, splintering and eventually rotting. Most stain jobs that fail early do not fail because of the stain — they fail because of what happened, or did not happen, before it went on.
Clean, then dry, then stain
Wood has to be cleaned of the grey oxidised surface layer and any mildew first, because stain applied over that is bonding to a layer that is already letting go. Then it has to dry. Wood that looks dry on the surface can still be wet inside a day after washing, and stain sealed over trapped moisture peels within a season. Waiting for genuinely dry wood is the single biggest factor in how long the finish lasts.
Semi-transparent or solid
Semi-transparent stain soaks in and lets the grain show. It weathers by fading rather than peeling, which makes recoating simpler, but it needs doing more often. Solid stain sits closer to paint: it covers the grain, hides a lot of age and lasts longer, but when it eventually fails it fails by flaking, and that means stripping rather than recoating. On a badly weathered deck, solid is often the honest choice.
The floor wears out first
Deck boards take sun, rain and foot traffic; rails and spindles take far less. It is normal for the walking surface to need attention years before the rest, and it is usually cheaper to recoat the floor on its own than to wait until everything needs stripping.
What moves the price
- Deck size, and how much railing and spindle work there is
- Condition — a first coat on sound wood versus stripping failed finish
- Whether the existing finish is peeling and has to come off
- Semi-transparent versus solid
- Boards needing repair or replacement before finishing
This is why a photo prices most jobs without a visit.