When to Stain or Refinish a Deck in the Lower Mainland

Stain only works on dry wood in dry weather, and on this coast that narrows the calendar. Late April to early June usually gives enough warm, dry days to wash, dry, stain and cure before summer gets busy. Late August into September is the second chance, as long as you finish before the fall rain settles in. Outside those windows you spend more time waiting on the weather than working.

When to stain a deck: the weather you need

Watch the forecast more than the calendar. The stain makers set clear limits. Cabot's deck guide says to stain when the air and the wood are between 10 and 32 degrees Celsius, out of direct sun, and not when rain is forecast in the next 12 to 24 hours. Sansin says not to apply its Dec stain if rain or near-freezing temperatures are expected, or on wood that is warm to the touch. In practice that means a cool, dry morning at the start of a dry spell.

Sun is the other trap. Both Cabot and Sansin say to keep stain out of direct sunlight, and a deck that has baked all afternoon is too warm. I start on the shaded side and follow the shade around.

How long does wood need to dry after washing?

Longer than it looks. Wood can feel dry on top while the inside is still wet, and stain over damp wood does not bond. Cabot's deck guide says to let a washed deck dry for two to three days before staining. That is in good weather. A shaded deck, or a deck washed in a damp week, needs more.

If you are unsure, give it one more dry day. Staining a day late costs nothing. Staining a day early can cost the whole job. My guide on pressure washing before staining covers the wash itself, including why wood gets a gentler touch than concrete.

How often should a deck be restained?

There is no single number. Sansin's data sheet for its Dec deck stain says horizontal surfaces need a maintenance coat every 1 to 4 years, and that the timing depends on the prep, the application and how exposed the deck is. A deck in full south sun and heavy foot traffic sits at the short end. A shaded deck with good prep lasts longer.

Let the deck tell you. Sansin suggests a water drop test on a finished deck: if water beads, the finish is still protecting the wood. If it soaks in, it is time for a maintenance coat. Fading and worn patches on the stairs and the path to the door are the other signs. A light maintenance coat on time costs far less than stripping a deck that was left too long.

What deck refinishing involves

• Wash to strip mildew, grime and loose old finish
• Let the wood dry fully before anything else goes on
• Sand rough boards, especially railings and splinters
• Replace rotten boards before staining, because finish cannot save failed wood
• Stain as the maker directs, usually two coats for a penetrating stain (I use Sansin or Behr Premium)
• Allow proper dry time between coats and before furniture goes back

What drives the price

• Deck size, meaning the area of boards plus railings and stairs
• Number of rotten boards needing replacement
• Condition of the old finish (a full strip or a light prep)
• Stain choice, because better products cost more but usually hold up longer
• Access (a ground-level deck or a raised second-storey one)

When to call instead of DIY

A confident homeowner with a free weekend can refinish a small ground-level deck. People usually call me for second-storey decks (ladder time and safety), decks with a lot of rotted boards (the rot needs a proper look before any finish goes down), or decks where a first try came out blotchy. Getting it right the first time almost always costs less than stripping a failed job and starting over. If rot has reached the frame, read deck repair or replacement before you stain anything.

I book deck refinishing in Langley, deck staining in White Rock and the rest of my area into the spring and late-summer windows first, since that is when stain works. The full scope is on the fence and deck services page.