Aluminum exterior work — soffit, fascia, eavestroughs (gutters) — is one of the most practical and weather-critical maintenance renovations for Ontario homes. Here’s the complete guide.
Why it matters: Ontario’s freeze-thaw cycles, ice damming, and heavy rainfall make proper eavestrough and soffit systems essential. Failed eavestroughs lead to water infiltration at the foundation and fascia rot. Blocked soffits reduce attic ventilation and contribute to ice dam formation.
Soffit: The underside of your roof overhang. Vented soffit allows air intake to the attic (essential for proper ventilation, moisture control, and ice dam prevention). Most Ontario homes should have continuous vented soffit.
Fascia: The vertical board at the roof edge where eavestroughs mount. Aluminum-wrapped fascia over wood substrate is the GTA standard for low-maintenance durability.
Eavestroughs (gutters): 5-inch K-style aluminum is the residential standard in Ontario. Seamless (roll-formed on-site) eliminates joints that can separate and leak. Downspouts should direct water 6+ feet from the foundation.
Cost ranges (GTA, 2026):
- Full eavestrough replacement (average home): $2,500–$6,000
- Soffit and fascia replacement: $4,000–$12,000
- Combined soffit/fascia/eavestrough package: $7,000–$18,000
Leaf guards: Add $500–$2,500 for leaf guard systems. Worthwhile for homes under mature trees.
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