A property manager called me out to a mid-rise last spring because the exterior wood trim she had painted the year before was already failing — paint lifting in sheets around the fascia, soft spots in the soffit boards, and dark staining bleeding down from the corners. The crew before us had done exactly what most crews do: pressure-washed, painted the next day, moved on. This post is for property managers and condo boards who own buildings with any exposed wood — fascia, soffits, door and window trim, wood siding, railing caps — and keep paying to repaint it every few years. The wood is not the problem, and neither is the paint. It is what happens in the eight hours before the brush touches it.
1. Painting over wood that is still wet or already rotting
Wood has to be sound and dry before it sees a drop of paint. Ottawa’s freeze-thaw swing drives water into every crack, and a board that reads fine to the eye can be holding 20 or 25 percent moisture inside. Paint over that and you have sealed the water in — it cannot dry outward, so it pushes the film off from behind. That is the peeling-in-sheets look, and it is one of the most common reasons exterior paint fails early. It has nothing to do with the paint being cheap.
Rot is worse, because paint hides it. A soft, punky fascia board gets filled, sanded, and coated, and for a season it looks perfect. Underneath, the rot keeps spreading — and now it is spreading under a sealed surface where nobody can see it until the board fails. I never paint over rotten wood. If it is soft, it comes out.
What to look at: Press a screwdriver into your fascia and soffit boards at the corners and along the bottom edges. If it sinks in or the wood feels spongy, that section needs replacing before anyone repaints — not filling.
2. Bare and weathered wood needs primer, not just a heavier coat of finish
When wood sits exposed for a few years, the sun breaks down the top layer of fibres into a soft, grey, dead surface. Paint bonds to that dead layer instead of to the wood, so it takes the loose fibres with it when it lets go. Sanding back to sound wood and priming is what gives the topcoat something real to grip — the same discipline that keeps repainted wood siding and cladding holding for a decade instead of three years.
The primer also matters. Bare exterior wood — especially anything with tannins like cedar or old growth — wants an oil or stain-blocking primer so those tannins do not bleed brown through a fresh white topcoat. And the end grain, the cut ends of boards, drinks water like a straw. Priming those cut ends, ideally before the board even goes up, is the single cheapest thing that extends the life of exterior trim.
What to look at: Rub a dark cloth on your painted trim. If it comes away chalky and the surface feels powdery, the coating is failing and the next repaint needs full prep and prime — not another coat laid over top.
3. The joints and end grain are where the water actually gets in
Almost every wood-rot problem I find on a building starts at a joint — where two trim boards meet, where trim meets siding, where the wood butts into brick or a window frame. Water sits in that seam, wicks into the end grain, and freezes. Over a couple of winters that is how a solid board turns soft from the inside.
The fix is caulking the right joints with the right sealant — a flexible exterior-grade sealant that moves with the wood through the seasons, applied at the vertical and top joints where water collects. And you leave the bottom edges of horizontal boards open on purpose, so any water that does get in has a way to drain and dry. Sealing a board up airtight all the way around traps moisture instead of shedding it.
What to look at: Walk your building’s worst elevation — usually the one that faces the weather — and look at the top and side joints of the trim. Open, cracked, or missing caulking at those seams is where your next rot problem is already starting.
4. Spot-repair versus full restoration — and why it is a reserve-fund decision
Not every building needs every board replaced. On a lot of the portfolios I walk, 80 percent of the wood is sound and just needs proper prep, prime, and two coats, while a handful of boards at the wet corners need to come out and be rebuilt by a carpenter first. Knowing the split before the work starts is what keeps the number honest — and it belongs in the reserve-fund conversation, not a same-day quote.
If a board is structurally gone, painting it is throwing good money after bad — it belongs in the reserve fund as a repair, with the carpentry subbed to someone who does it properly, and only then do we prime and paint. And if what is actually failing is metal, not wood — steel railings or lintels — that is a different repair again, closer to remediating exterior steel and rust. When a quote treats a rotting building as a straight repaint, the board is being set up to pay twice.
What to look at: Ask any painter quoting your exterior wood to tell you which boards they are replacing versus repainting, and who is doing the carpentry. If the answer is “we will just paint all of it,” get a second look.
What to do if you are seeing any of this
If your building’s exterior wood is peeling, staining, or feeling soft, the worst move is to repaint it on the same cycle and hope. I would rather come out, sound the wood, and tell you honestly which boards are sound enough to prep and coat and which ones need to be rebuilt first — so the reserve fund pays once, not every three years.
I assess exterior wood and trim across Ottawa for condo corporations, property managers, and multi-building portfolios. If you want a straight read on what your trim actually needs, reach me at 613.325.3011 or yasir@heims.ca.
— Yasir, HEIMS Construction
HEIMS Construction is an Ottawa-based commercial painting and building-restoration contractor serving condominium corporations, property managers, and institutional clients across the Ottawa region. We are fully licensed and insured, carry $5M liability coverage and WSIB coverage, and are members of BOMA Ottawa.