Interior Warning Signs
Water stains on ceilings: Yellow or brown staining is the most common sign of active or past infiltration. The stain rarely appears directly below the entry point — water travels along rafters and sheathing before dripping through. Stains in multiple rooms suggest a systemic problem. Peeling paint on interior walls: Moisture migrating through the structure can cause paint to bubble and peel near exterior walls. Mould in the attic: Dark growth on rafters or sheathing indicates chronic moisture — often from a combination of roofing failure and ventilation inadequacy.
Exterior Warning Signs
Granules in gutters: A small amount is normal; heavy granule accumulation after rain indicates significant shingle wear. Curling or cupping shingles: Shingles curling upward at the edges (cupping) or inward at the centre (clawing) are past their service life and no longer provide reliable waterproofing. Missing shingles: Any gap in the shingle layer is an immediate infiltration risk. Moss or algae: Growth retains moisture against the shingle surface and accelerates deterioration.
Structural Warning Signs
Sagging roof sections: A depressed or wavy roof line indicates structural issues — either rafter damage or saturated, deteriorating decking. This is an advanced failure requiring immediate professional assessment. Visible daylight in the attic: Any daylight visible through the roof deck from inside the attic is an urgent sign of compromise in the roofing layer.
Seasonal Warning Signs Specific to Gatineau
Ice dam formation at the eaves in winter: A sign of inadequate attic insulation or ventilation allowing heat escape, combined with snow accumulation. Icicles alone are not necessarily a problem, but large ice formations at the eave edge that extend across the full roof width indicate an ice dam is forming. Excessive heat in the attic in summer: A very hot attic (above 60°C on summer days) indicates inadequate ventilation, which shortens shingle lifespan dramatically.
Frequently Asked Questions
What should I do if I see a water stain on my ceiling in Gatineau?
Document it with a photo, note the date, and call Cossette at 819-777-7177 for a free inspection. Do not wait for a second stain to appear — by the time visible staining occurs, water infiltration has typically been occurring for weeks or months.
Can I tell from the ground if my roof is failing in Gatineau?
A ground-level check is a useful starting point — look for missing shingles, visible sagging, and heavy moss or lichen growth. However, many roofing problems are only visible from the roof surface or from inside the attic. A professional on-roof inspection is essential for an accurate assessment.
Are moss and algae on my Gatineau roof a serious problem?
Yes, over time. Moss retains moisture against shingles and accelerates granule loss and shingle deterioration. Black algae streaks (Gloeocapsa magma) are primarily aesthetic but indicate a moist environment that encourages more damaging growth. Treatment and preventive zinc or copper strips can address existing growth and slow recurrence.