How cedar cladding ages comes down to a decision made before the first board went up: whether it was left untreated to silver, or finished with a UV-stable oil to hold its original colour.
Both are legitimate choices, but each carries a different maintenance commitment, and mixing them up is where most disappointment comes from.
How it behaves over 10 to 20 years
Untreated cedar reaches a stable silver-grey patina within a few years and then changes very little, provided the ventilated cavity behind it is doing its job and the boards themselves aren't holding water.
Oiled or stained cedar holds its warmer tone for a period after each application, then gradually fades and needs recoating to maintain the look — skipping this doesn't damage the timber, it just lets it drift toward the natural silver anyway.
Maintenance for each finish
For untreated cedar left to silver, the main task is keeping the ventilated cavity clear at the top and bottom so air can still move behind the boards, and washing down periodically to even out patchy weathering between sheltered and exposed areas.
For oiled or stained cedar, recoating on a regular cycle is the maintenance commitment — this needs to be built into ongoing upkeep expectations from the start, not treated as optional.
Early warning signs
Dark streaking running down from individual fixing points is usually a sign that non-stainless fixings were used and are reacting with the timber's tannins — it's a fixing problem, not a timber defect, but it needs the fixing type checked.
Boards that feel soft or spongy, particularly near the base of the cladding or around openings, point to moisture getting trapped rather than draining and drying through the cavity as designed.
Cupping or bowing of individual boards is often a sign of inadequate ventilation behind the cladding rather than a fault with the cedar itself.
Repair versus replace
Individual damaged or badly stained boards can usually be replaced in isolation, since cedar cladding is fixed board by board rather than as one continuous sheet, provided matching profile and grade timber is available.
Where the problem is systemic — trapped moisture across a whole elevation, for example — replacing individual boards without fixing the ventilation behind them just delays the same failure recurring.
If tannin staining has become widespread and cosmetic restoration is wanted, washing down and re-oiling the whole elevation is more effective than trying to spot-treat individual marks.
Common questions
My cedar has gone patchy grey in some areas and stayed warm in others — is that a fault?+
No, that's normal weathering driven by uneven sun and rain exposure across the elevation. It evens out over a few years, or can be accelerated by washing down the whole surface.
How often does oiled cedar need recoating?+
It depends on exposure and the specific product used, but it's worth checking annually and expecting to recoat well before the colour has visibly faded, rather than waiting until it looks tired.
Can I switch an untreated cedar wall to an oiled finish later?+
Yes, but the silvered surface needs to be cleaned back before oil is applied, and the result won't look identical to cedar oiled from new — it's worth discussing expectations before starting.
Get your cedar cladding assessed
We'll check the boards, fixings and cavity ventilation and tell you honestly what needs attention.