Frequently Asked Questions

Architectural shingles use multiple layers for dimensional texture and enhanced durability, while designer shingles mimic premium materials like slate or cedar shake with specialty shapes and color blends. Both outlast standard three-tab shingles, but designer options offer more distinctive curb appeal at higher cost.

Roofs nearing 20 years with widespread shingle curling, multiple leak points, or missing granules across large sections typically need replacement rather than repair. Isolated damage like a few missing shingles or localized flashing failure can be repaired, but systemic aging means repairs become temporary fixes that don't address underlying deck or ventilation issues.

Inadequate ventilation traps heat in the attic, causing shingles to age prematurely from underside heat exposure and ice dam formation in winter. Proper intake and exhaust ventilation regulates temperature, prevents moisture buildup, and can extend shingle life by five to ten years by reducing thermal cycling stress.

Steel roofing reflects solar heat rather than absorbing it, reducing attic temperatures by up to 20 degrees compared to dark asphalt shingles. Reflective finishes and standing seam designs create air gaps that improve thermal performance, lowering cooling costs during summer months while resisting heat transfer year-round.

Standing seam panels hide fasteners under raised seams, eliminating puncture points where water can enter and fasteners can loosen over time. Exposed fastener systems cost less upfront but require periodic maintenance to check rubber washer integrity, while standing seam systems offer cleaner lines and longer maintenance-free performance.

Look for lifted or creased shingles, missing ridge caps, displaced flashing around chimneys and vents, and granule loss in valleys where wind accelerates. Wind-driven rain can infiltrate under compromised shingles even without visible holes, so interior ceiling stains or attic moisture indicate damage that needs immediate assessment.

Low-slope roofs under 3:12 pitch require materials designed for slower water runoff, like modified bitumen or metal with sealed seams, while steeper pitches allow standard shingles. Pitch also affects walkability during installation, ventilation requirements, and the amount of material needed due to surface area differences.

Tear-off removes all existing shingles down to the deck, allowing inspection for rot, proper flashing installation, and code-compliant underlayment. Overlays add new shingles over old ones to save labor costs but hide deck damage, add weight, void most manufacturer warranties, and reduce the lifespan of the new layer.

Flashing endures constant thermal expansion at transition points like chimneys, vents, and valleys where two roof planes meet. Sealant degrades from UV exposure, metal corrodes from moisture contact, and improper installation leaves gaps that allow water behind shingles before the roofing material itself fails.

Inspectors document shingle condition, flashing integrity, ventilation function, debris accumulation, and signs of moisture intrusion or structural concern. The report identifies minor repairs needed now to prevent major damage later, estimates remaining roof life, and provides documentation useful for insurance or resale purposes.

Wind-resistant shingles use reinforced adhesive strips and heavier mat construction to meet higher wind ratings, typically withstanding gusts up to 130 mph versus 60-90 mph for standard shingles. They resist edge lifting that allows wind-driven rain underneath and reduce blow-off risk during severe weather common in Ontario's variable climate.

Clear items from around the home's perimeter since debris falls during tear-off, move vehicles away from the driveway, cover attic belongings if accessible from inside, and trim tree branches within six feet of the roof. Contractors typically handle exterior prep like protecting landscaping and setting up debris containment, but interior precautions prevent dust intrusion.