Posted July 24, 2026 · ~4 min read · Category: Exterior painting
A property manager called me out to a six-storey condo last week because her board could not agree on whether the building needed repainting. From the parking lot it looked fine. Then we walked around to the south side, and the same colour that read crisp and even on the north face was pale, streaky and dusty to the touch. Same paint, same year, same crew — one elevation had aged a decade ahead of the others. This post is for property managers and condo boards trying to decide when an exterior repaint is actually due, and how to read the one wall that will tell you first.
1. Sun ages paint faster than weather does
Most boards assume winter is what kills exterior paint in Ottawa. Freeze-thaw matters, but ultraviolet light is the bigger clock. UV breaks down the resin — the glue that holds the pigment to the wall — and the south and west elevations take several times the UV dose of the north face every single year.
That is why a building almost never fades evenly. The north elevation of a well-prepped repaint can look presentable at 12 years while the south side is visibly tired at 6 or 7. If you inspect only the elevation facing the street, or the one beside the entrance, you can miss the real condition of the building entirely.
What to look at: walk the full perimeter and compare the same colour on the north and south faces. If they no longer match, the clock is running.
2. The wipe test tells you more than a site meeting
Fading is cosmetic. Chalking is the warning. When UV has broken enough of the resin, the surface releases loose pigment as a fine powder — wipe a dark cloth firmly across the wall and it comes away with a pale film, like dust off a chalkboard.
Light chalk means the finish is oxidizing but still protecting. Heavy chalk — a cloth that comes away streaked white — means the binder is failing, and the next stage is erosion down to bare substrate. Once that happens on stucco, wood or fibre-cement, you are no longer buying a repaint; you are buying repairs plus a repaint. On siding and cladding the same test works on any painted panel.
What to look at: do the cloth test on the south elevation at chest height. Keep the cloth — it is the cheapest condition report you will ever show a board.
3. Fading, chalking, erosion — the order never changes
Exterior paint fails in a sequence: first gloss drops, then colour fades, then chalk appears, then the film thins and erodes, then the substrate is exposed. Each stage is roughly 2 to 3 years behind the last on a south wall, longer on the others.
The reason this sequence matters for a board is cost. A repaint ordered at the chalking stage is a wash-prime-paint job. The same building left until erosion needs patching, sealing, sometimes full substrate repairs — I have seen the price of waiting double the scope. None of this is about the paint being cheap; it is about catching stage three instead of stage five.
What to look at: if any elevation shows streaking below sills or scuppers where rain has washed channels through the chalk, you are past the halfway point.
4. Plan the repaint by the worst wall, budget it by the whole building
Boards sometimes ask me whether they can repaint just the south side and defer the rest. Mechanically you can; financially it rarely makes sense, because mobilization — access equipment, swing stages, scheduling around residents — is a large share of the price, and you pay it twice. What does make sense is specifying a higher-UV-resistance topcoat on the south and west faces so the elevations age closer to the same schedule, which is exactly the conversation to have while the reserve fund study is being updated, not after the wall is bare. For portfolios, the same logic scales across buildings — I covered that in the piece on multi-building exterior repaints.
What to look at: your reserve study’s repaint interval. If it assumes one number for the whole envelope, ask whether that number came from the north wall or the south one.
What to do if you’re seeing any of this
If the south face of your building no longer matches the north, do the cloth test this week and photograph the result. That tells you which stage you are in, and the stage — not the calendar — is what should set the repaint year. If you want a rough number to take to the board first, our painting cost estimator is a reasonable starting point.
I assess exterior paint condition across Ottawa — condo corporations, multifamily portfolios and institutional buildings — elevation by elevation. If you want a read on where your building actually sits, call me at 613.325.3011 or email yasir@heims.ca.
— Yasir, HEIMS Construction
HEIMS Construction is an Ottawa-based commercial and institutional painting and drywall contractor serving Ottawa and the surrounding region. We are fully licensed, carry WSIB coverage and $5M commercial general liability insurance, and are members of BOMA Ottawa.