What maintenance does an EIFS exterior require in Ottawa?

EIFS maintenance in Ottawa is straightforward but absolutely non-negotiable. Our climate — with its extreme freeze-thaw cycling, heavy snow loads, wind-driven rain, and intense summer sun — puts more stress on EIFS than almost any other Canadian city. A consistent maintenance routine protects your investment and prevents small issues from becoming expensive structural repairs.

Annual Maintenance Checklist (Every Spring)

Do a full visual inspection once the snow melts, ideally in April or early May. Ottawa's winter takes a toll, and catching damage early is the whole point. Walk the perimeter and check:

• Sealant joints: Inspect every caulked joint around windows, doors, vents, light fixtures, and hose bibs. Look for cracks, gaps, pulling away from surfaces, or hardened/brittle sealant. This is the single most important maintenance item for EIFS in Ottawa.
• Surface cracks: Hairline cracks under 1/16" are cosmetic and can be monitored. Anything wider needs sealing with an elastomeric caulk before the next rain season. Diagonal cracks at window corners may indicate structural movement — have these investigated.
• Impact damage: Look for dents, punctures, or gouges from ice, hail, lawn equipment, or fallen branches. Even small punctures allow water behind the system.
• Base of wall: Ensure soil, mulch, or snow haven't been piled against the EIFS. Maintain at least 200mm (8") of clearance between grade and the bottom of the EIFS. Clear any debris from weep screeds.
• Biological growth: Ottawa's humid summers can produce algae or mildew on north-facing walls. Clean with a soft brush and a solution of one part bleach to ten parts water. Never pressure wash EIFS — it can damage the finish coat and force water behind the system.

Periodic Maintenance (Every 5-10 Years)

Sealant replacement: All sealant joints should be completely replaced every 7–10 years in Ottawa's climate. Don't just apply new caulk over old — remove the existing sealant, clean the joint, install fresh backer rod, and apply new polyurethane sealant. Cost: $1,500–$3,500 for a full home depending on the number of openings and penetrations.

Finish coat recoating: After 15–25 years, the acrylic finish coat may become chalky, faded, or thin. A fresh coat of elastomeric paint or a full finish recoat restores the appearance and weather protection. Cost: $4–$8 per square foot, or roughly $6,000–$12,000 for a typical Ottawa home.

What NOT to Do

• Never pressure wash — use garden hose pressure only
• Never attach anything directly through the EIFS without proper sealant (Christmas lights, house numbers, plant hooks). Each penetration is a potential water entry point.
• Never pile snow against EIFS walls when shovelling — direct it away from the house
• Never ignore small repairs — a $200 patch today prevents a $20,000 moisture remediation project in three years

Annual maintenance takes about 1–2 hours of your time and costs nothing beyond a tube of caulk. Professional inspections every 3–5 years (about $300–$500) give you peace of mind that the system is performing as it should through Ottawa's demanding seasons.

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