The Stucco Maintenance Calendar Every GTA Homeowner Should Follow

Do this once the snow is gone and before the growing season hides everything, so roughly April in most of the GTA. Winter is when damage happens and spring is when you can still see it clearly.

Walk the full perimeter of the house slowly. Look at the whole wall from ten feet back first, because staining patterns and colour differences show up at distance in a way they do not up close.

Then go close on the details. Check every sealant joint around windows and doors: is it intact, or is it cracked, shrunken, or pulled away at one edge? Check every penetration, meaning vents, hose bibs, lights, meters, the AC line set. Check where any roof edge meets a wall and confirm the flashings are intact. Check the base of the wall all the way around for chips, spalling, salt damage and cracking, particularly along the driveway and walkways.

Tap suspicious areas with a knuckle. You are listening for a hollow sound where the surrounding wall rings solid.

And check the grade. Winter shifts soil and mulch. Confirm the ground still slopes away from the house and that the bottom of your cladding is not buried.

Write down or photograph anything you find. A photo from last April is genuinely useful for judging whether a crack is growing.

Once a year, or every couple of years, wash the elevations that need it. That is usually the north side, anything under trees, and any wall close to a neighbouring building. These walls develop a grey or green cast from algae and airborne dirt, and homeowners routinely interpret this as the colour fading when the finish is actually fine.

The method matters more than the frequency. Low pressure, appropriate cleaning solution, work from the bottom up when applying and top down when rinsing, and keep water away from open joints and penetrations.

What I ask people not to do is take a pressure washer to an acrylic finish. High pressure will erode the finish surface, expose the base coat, damage sealant joints, and force water into the assembly at exactly the details you are trying to protect. I have seen more finish damage from well-intentioned pressure washing than from weather.

If there is significant organic growth, use a treatment intended for it rather than scrubbing harder. Anything biological left on the wall will simply grow back, and scrubbing a textured finish aggressively wears the texture down.

On a two-storey elevation, this is a job worth hiring out. Not because the technique is difficult but because ladder work on the side of a house is how people end up in hospital.

Do this in October, while there is still time to act on what you find and while the weather still allows repairs.

The fall walk-around is the same inspection as spring, with a different priority: you are looking for anything that would let water into the wall over the winter, because water in a wall in December is water that will freeze.

Specifically: any open crack, any failed sealant joint, any gap at a penetration, any damaged area at the base of the wall. These are the things to address before the freeze rather than after, because a small open crack in October is a bigger crack in April.

Then do the things that are not stucco but that protect it. Clean the gutters, because an overflowing gutter dumps water down the wall all winter. Confirm every downspout discharges well away from the foundation and not against the wall. Trim back vegetation so it is not touching the wall, because plants against a wall hold moisture and prevent drying.

And plan for snow and salt. Think about where snow gets piled when the driveway is cleared, because a snow bank against the base of a wall keeps that section saturated and salted for months. If the usual pile goes against the house, change where it goes.

This is the maintenance item that matters most and gets ignored most, so it deserves its own section.

Every joint where the cladding meets something else, windows, doors, penetrations, transitions between materials, control joints, is sealed. That sealant is what keeps water out of the assembly at exactly the places water tries to get in. And it is a consumable product with a service life, not a permanent part of the building.

Depending on the product, the joint design and the exposure, plan on inspection every year and replacement roughly every seven to ten years. South and west elevations, which take the most UV and the most thermal movement, will need it sooner than the north side.

What failure looks like: the sealant becomes hard and loses flexibility, it cracks along its length, it shrinks and pulls away from one edge of the joint, or it fails cohesively and splits down the middle. Any of those means the joint is open.

Doing it properly means removing the old material completely, cleaning the joint faces, installing backer rod so the sealant bonds to two faces rather than three, and applying a sealant compatible with the finish. Squeezing new caulk over old failed caulk is the most common wrong approach and it lasts about a season.

If you are having an elevation recoated, do the sealant at the same time. The access is already paid for and it is a fraction of the cost as part of a larger scope.

Reasonable to do yourself: the walk-around inspections, gentle washing of ground-floor walls, keeping vegetation trimmed back, managing snow and salt, cleaning gutters if you are comfortable on a ladder, and small hairline crack repairs on accessible ground-floor walls in good weather.

Worth calling someone for: anything above the first storey, anything at a roof junction, any area that sounds hollow or feels soft, any crack that has reopened after a previous repair, any staining that suggests water is travelling, sealant replacement on a full elevation, and anything where you are not sure what you are looking at.

The honest reason for most of that list is not that the work is complex. It is that it is at height, and every year people are seriously injured doing exterior maintenance off a ladder that was not set properly.

I would also say: an annual inspection by someone who does this for a living is not a big expense and it catches things a homeowner reasonably would not spot, like a missing kickout flashing or a sealant joint that has failed cohesively but still looks intact from six feet away. If your house is over fifteen years old or you have never had the exterior properly looked at, it is worth doing once to establish a baseline.

And keep the paperwork. Manufacturer, product, colour code and texture from your original job. In ten years when you need a repair, that piece of paper is worth a lot.