What it usually means, the likely causes in order, what to safely try first, what a pro charges in Canada, and when to stop and call one.
This guide covers the common cases. Describe your exact problem and get a personalized diagnosis — free to start, with a DIY vs. call-a-pro verdict and a real cost estimate.
General weathering on a deck or fence is the slow, honest kind of damage: sun bleaching the colour out of the boards, rain raising the grain and opening small checks and cracks, fasteners working slightly proud, and a finish that has thinned to nothing in the traffic areas while surviving under the furniture. Nothing here has failed, exactly; the wood is simply unprotected and getting older in public. The good news in the usual assessment, and it is worth hearing before anyone quotes a rebuild, is that a wash and a re-stain is often enough at this stage, provided the boards underneath are still sound.
Weathering itself is not urgent, and this is the one deck and fence problem you can schedule entirely at your convenience. The reason not to shelve it indefinitely is that bare, greyed wood absorbs water far more readily than finished wood, so general wear left alone for several more seasons quietly graduates into the cracked boards and early rot covered elsewhere in this section. Think of maintenance now as the inexpensive alternative to replacement later, and pick a dry stretch of weather to do it in.
Sunlight degrades the fibres at the surface of the board, which is what turns rich-toned wood silver-grey and leaves it feeling slightly fuzzy or fibrous. South and west facing runs weather fastest. The damage is shallow, but the weakened surface sheds finish quickly and lets water in far more easily than sound, finished wood.
Stain and sealant do not fail all at once; they thin first where feet, chair legs, sun, and standing water work hardest, so the deck ends up protected in patches and bare in others. Water beading on one board and soaking straight into the next is the visible sign that the finish has effectively retired.
Boards swell when wet and shrink as they dry, and years of that cycling opens small surface cracks called checks, cups boards slightly across their width, and raises splinters along the grain. It looks alarming up close but, on its own, is a surface condition of aging wood rather than structural decay.
Shaded and north-facing sections, and anywhere water lingers, grow a dark or green film that makes boards slippery and holds moisture against the wood. Much of what homeowners read as the wood being ruined is this surface growth over sound timber, which is why a proper wash changes the picture so dramatically.
| Job size | Typical estimate (CAD) |
|---|---|
| Simple fix — the straightforward version of this repair | $150–$350 |
| Major job — complex, hidden, or replacement-level work | $1,000–$8,000 |
Estimates only, calibrated to Greater Toronto Area trade rates and adjusted by region on this site — not a quote. Your exact price depends on the cause, parts, and access. A personalized diagnosis narrows this range using your specific symptom.
Washing, brightening, light sanding of splintered spots, and re-staining a deck or fence whose boards test sound is satisfying, very doable DIY, spread over a dry weekend. Bring in a pro when the inspection turns up soft boards, failed posts, or a structure that moves, when the deck is large or multi-level enough that consistent finishing is a stamina problem, or when you want the assessment itself done by someone with no product to sell. The dividing line is soundness: maintenance you can do; structure you should not guess at.
Almost certainly not. The silver-grey colour is the sun-damaged surface layer of the wood, and beneath a fraction of a millimetre of it the board is usually sound, which a wash and a test patch will prove. Greying becomes a real problem only when bare wood is left wet season after season, because then the surface checking deepens and rot can gain a foothold at board ends and joints.
There is no honest single interval, because sun exposure, shade, foot traffic, and the previous finish all change the answer. The water test is a better guide than the calendar: when water stops beading and starts soaking straight into the traffic areas, the finish has worn through there and the wood is ready for cleaning and a new coat, whatever the date happens to be.
Both, depending on technique. A moderate wash with the jet kept moving and at a sensible distance lifts years of grime and failed finish beautifully. Held close and still, the same machine gouges the soft earlywood, leaves stripes and raised fibres, and manufactures splinters. Keep the pressure modest, work with the grain, and let a deck cleaner do the chemical part of the job rather than forcing everything off with water alone.
Shallow surface checks that follow the grain, on a board that is firm to the screwdriver test and solid underfoot, are cosmetic and can be sanded and finished over. Replace a board when a crack runs deep, splits a board end around its fasteners, catches a heel, or the wood around it tests soft. A board can look dramatic and be sound, or look tidy and be rotten; the test, not the photo, decides.
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