Seasonal Roof Maintenance

Spring — Post-Snowmelt Inspection

April through May is the critical inspection window for Renfrew County homeowners. As the snow cover recedes and temperatures consistently rise above freezing, inspect the roof for damage accumulated during the winter months.

What to Look For

• Ice dam damage: Check the eaves for lifted shingles, displaced flashing, and damaged gutters caused by ice expansion. Interior water stains near exterior walls are a strong indicator that ice dams forced water back under the shingles.
• Lifted or damaged shingles: Freeze-thaw cycles can lift the edges of shingles, breaking the sealant bond. Look for curled or raised shingle edges, particularly on south-facing slopes that experience the most thermal cycling.
• Gutter damage: Ice accumulation in gutters can pull hangers loose, separate joints in sectional systems, or dent seamless aluminum gutters. Check that gutters are properly aligned and not sagging.
• Attic inspection: Enter the attic on a sunny spring day. Look for daylight penetrating through the roof deck (indicating missing shingles or gaps), water stains on the underside of the sheathing, and signs of animal entry or nesting.
• Granule loss: Check downspout outlets and ground areas below downspouts for significant accumulations of asphalt granules. Moderate granule loss is normal on aging shingles, but heavy loss indicates shingles nearing end of life.

Summer — Storm Damage Checks

Renfrew County’s summer brings convective thunderstorms, hail, and occasional high winds. Summer inspections are best performed after each significant storm event.

Post-Storm Inspection

• Wind uplift: After a storm with high winds, inspect the roof from the ground using binoculars for lifted, curled, or missing shingles. Pay particular attention to ridge caps and hip shingles, which are most vulnerable to wind damage.
• Hail damage: Hail impact leaves distinctive marks on asphalt shingles: small circular depressions with a dark centre where the granule layer has been fractured. Hail damage may not cause immediate leaking but reduces shingle lifespan and may affect insurance claims.
• Flashing condition: Summer heat causes thermal expansion of metal flashing. Check for separation at flashing joints, gaps between step flashing and wall cladding, and deteriorated sealant around chimneys and skylights.
• Valley debris: Summer storms can deposit debris in roof valleys. Sticks, pine cones, and leaves in valleys can trap moisture and accelerate deterioration. Clear them by hand or with a leaf blower from the ground or with a long-handled brush.

Fall — Critical Pre-Winter Preparation

September through October is the most important maintenance window for Renfrew County homeowners. Proper fall preparation directly affects ice dam risk and the roof’s ability to survive winter.

Gutter Cleaning

Renfrew County’s mature maples and oaks drop massive amounts of leaves in autumn. Clogged gutters are the leading preventable cause of winter ice dam formation. Leaves in gutters hold moisture, freeze into blocks, and prevent meltwater from draining. Clean gutters thoroughly after the last leaves have fallen. This is the single most cost-effective maintenance task a homeowner can perform.

Attic Ventilation Check

Proper attic ventilation is the primary defense against ice dams. Before winter sets in:

• Verify that soffit vents are clear of insulation, debris, or rodent nests
• Check that ridge vent or roof vents are unobstructed
• Ensure attic insulation (minimum R-60 for Renfrew County) is evenly distributed and not blocking airflow from the soffits
• Consider air sealing penetrations (recessed lights, attic hatches, plumbing stacks) that allow warm air to escape into the attic

Ridge and Hip Cap Inspection

Ridge and hip caps are exposed on all sides and experience the most wind and thermal stress. Check for cracked, lifted, or missing caps. Replace damaged caps before winter, when access for repairs will be dangerous.

Tree Branch Trimming

Overhanging branches drop debris onto the roof, shade the roof surface (promoting moss and algae growth), and can scrape or damage shingles in high winds. Trim branches to maintain at least 6 feet of clearance from the roof surface.

Winter — Ice Dam Monitoring

Winter roof maintenance in Renfrew County is primarily about observation and prevention, not physical roof work. Never walk on a snow-covered or icy roof.

Safe Snow Removal

If snow accumulation on the roof is extreme (typically over 2 feet of compacted snow), use a roof rake from the ground to pull snow off the lower 3–4 feet of the eave. This reduces the meltwater supply at the most vulnerable point. Use a roof rake with a non-marring wheel or blade to avoid damaging shingles. Never use a metal shovel or axe to remove snow from the roof surface.

Monitoring for Ice Dams

After a significant snowfall followed by freezing temperatures, monitor the eaves for icicle formation. Long icicles at the gutter edge are a symptom of ice dam formation: the icicle indicates that meltwater is flowing over the frozen dam. If you see water stains on interior ceilings or walls near outside walls during a thaw, an ice dam is actively leaking water into the home.

What to Do About Ice Dams

• Immediate: Remove snow from the lower roof edge using a roof rake from ground level
• Short-term: If interior leaking has started, contact a contractor with steam equipment for professional ice dam removal. Do not use calcium chloride or rock salt on the roof — these can damage shingles, flashing, and gutters.
• Long-term: After winter, address the root causes: upgrade attic insulation, improve ventilation, and consider ice and water shield installation at eaves.

Annual Maintenance Summary