How should I inspect my stucco each spring after Ottawa's harsh winter?

Spring inspection is the single most important maintenance task for Ottawa stucco homeowners. After five months of freeze-thaw cycling, ice loading, snow piling against walls, and road salt spray, even well-installed stucco deserves a thorough once-over. Late April to early May — once the snow has fully melted and you've had a few days above 10°C — is the ideal window.

Your Spring Stucco Inspection Checklist

Start with a slow walk around your entire home. Stand back about 3 metres and look at each wall face in raking light — early morning or late afternoon sun is best because it casts shadows that reveal cracks, bulges, and surface irregularities you'd miss in flat midday light.

Cracks: Look for any new cracking, especially around windows, doors, and where different building materials meet (like where stucco meets a stone foundation or wood trim). Hairline cracks under 1mm wide are cosmetic and normal — Ottawa's extreme temperature swings from -30°C to +35°C create thermal movement that causes minor surface cracking. Cracks wider than 3mm, or cracks that follow a stair-step pattern, suggest structural movement and need professional evaluation. A quick repair for hairline cracks runs $150 to $400 depending on accessibility; structural crack investigation starts around $500 to $800.

Efflorescence: White, chalky deposits on the surface indicate moisture migrating through the stucco and depositing mineral salts. Some efflorescence in the first year of new stucco is normal. On older Ottawa stucco, new efflorescence after winter suggests water is getting behind the system — possibly through failed caulking at windows or roof flashing issues.

Soft spots and delamination: Gently press on the stucco in several spots on each wall. It should feel solid and firmly attached. If you feel any give, springiness, or hear a hollow sound when you tap with your knuckles, the stucco has delaminated from the lath underneath. This is serious — water has gotten behind the stucco and frozen, pushing the coat away from the wall. Delaminated sections need professional removal and reapplication, typically $25 to $45 per square foot in Ottawa.

Caulking joints: Check every joint where stucco meets windows, doors, light fixtures, vents, and electrical boxes. Ottawa's winters are brutal on sealant — look for gaps, peeling, or hardened caulking that's pulled away from one surface. Recaulking your stucco-to-window joints with a quality polyurethane sealant is a $200 to $500 DIY job or $400 to $900 with a professional.

Ground-level damage: Pay special attention to the bottom 30cm of your stucco, especially on the side facing your driveway or street. Road salt spray and snowplow splash cause accelerated deterioration. Snow piled against stucco walls all winter holds moisture against the surface for months. You should maintain a 15cm gap between grade and the bottom of your stucco — if soil or mulch has crept up, pull it back.

Document everything with photos, including a full view of each wall face. This gives you a baseline to compare against next spring. If you find anything beyond cosmetic hairline cracks, get a professional assessment before Ottawa's summer heat sets the damage pattern.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Homeupgraders
• RenoMotion Inc.
• Regimbal
• Floor-2-Wall Inc
• ARTEXPRO Tile & Finishes

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