Deck Staining & Sealing in Tacoma, WA

Deck staining and sealing in Tacoma comes down to timing and prep. A finish soaks into wood only when the wood is clean and dry, and here that window is mostly late spring through early fall. July averages only about half an inch of rain, while November through January bring around 6 inches each. We schedule staining for dry stretches, check moisture before we start, and put most of the effort into cleaning and prep, because that is what decides how long the finish lasts.

Why wood decks need it here

Unprotected wood absorbs water, grows moss and algae in the shade, turns gray in the sun and starts to check and split. A good penetrating stain or water-repellent sealer slows water absorption and UV graying. In Tacoma, the shady, damp side of the deck usually wears out first, and green growth is often the first sign it is time.

Prep: cleaning, moss and sanding

We sweep and clear debris from board gaps, then clean the deck with a wood cleaner suited to the job. Moss and algae are scrubbed and rinsed off; on softwoods we keep pressure low so the grain is not raised or torn. Seattle Public Utilities warns that some moss products contain zinc or copper sulfates that are toxic to aquatic life, so we keep chemicals and rinse water out of storm drains. Gray or rough boards get a light sanding, and loose or popped fasteners are reset.

Choosing a finish

• Clear or toner sealer: shows the wood grain, least protection from graying, needs frequent recoats.
• Semi-transparent stain: a common choice here; tints the wood, shows grain and protects against water and UV.
• Solid stain: hides grain and covers older, weathered wood, but can peel in wet climates if moisture gets behind it.

Penetrating oil and water-based products both work; we match the product to what is already on the deck, since mixing incompatible finishes leads to peeling.

How often to restain

Angi notes that deck stain typically lasts two to five years and recommends restaining every two to three years. Horizontal boards in full sun and on shady, wet sides wear fastest; railings and vertical parts last longer. A light maintenance coat before the old finish fails is cheaper than stripping a peeling deck.

When staining is not enough

If boards are soft, split through or rotted, finish will not save them. We probe suspect areas during prep and tell you if any boards, stair treads or railing parts should be replaced before staining. Composite decks are not stained; they get a cleaning with a manufacturer-approved cleaner instead.