Asphalt ShingleRoofing in Peterborough & Kawartha Lakes

In Ontario's climate, quality asphalt shingles typically last 15-30 years depending on the product grade and installation quality. 3-tab shingles average 15-20 years, architectural shingles last 25-30 years, and premium designer shingles can reach 30-50 years. Proper ventilation, regular maintenance, and professional installation significantly extend lifespan.

• 3-tab shingles: 15-20 years
• Architectural shingles: 25-30 years
• Designer/premium shingles: 30-50 years
• Proper ventilation adds 3-5 years to any product

While Ontario building code allows up to two layers in some cases, we typically recommend complete tear-off for best results. Installing over existing shingles can hide deck damage, prevent proper ventilation, add excessive weight, void warranties, and reduce the new roof's lifespan. A tear-off allows us to inspect and repair the deck, install proper underlayment, and ensure ventilation works correctly.

• Our recommendation: Complete tear-off for longevity
• Benefits: Deck inspection, proper underlayment, better ventilation
• Overlay risks: Hidden damage, weight issues, shorter lifespan
• We assess each roof individually and explain all options

Most residential asphalt shingle replacements in Peterborough complete in 1-3 days depending on size and complexity. A typical 2,000 sq ft home usually takes 2 days: day one for tear-off, deck inspection, and underlayment; day two for shingle installation and cleanup. Complex roofs with multiple valleys, dormers, or skylights may take longer. Weather delays can extend timelines.

• Typical home (2,000 sq ft): 1-2 days
• Larger or complex roofs: 2-3 days
• Includes tear-off, installation, and complete cleanup
• Weather-dependent—we plan around local forecasts

Most chimney and valley leaks result from improper flashing installation or deteriorated sealants. Chimneys need step flashing integrated with shingles plus counter-flashing embedded in the masonry. Valleys require either metal flashing or woven shingles with ice and water shield underneath. Common failures include missing flashing, incorrect overlap, cracked caulking, or no waterproof membrane in critical areas.

• Chimney leaks: Usually improper flashing or failed sealant
• Valley leaks: Often from missing ice and water shield
• Prevention: Proper flashing installation and quality materials
• We detail all penetrations correctly from the start

Most homes benefit from ventilation upgrades during re-roofing. Proper attic ventilation prevents ice dams, reduces cooling costs, extends shingle life, and prevents moisture damage. Ontario building code requires balanced intake (soffit vents) and exhaust (ridge or roof vents). We calculate the required ventilation area based on your attic size and recommend the best solution for your home.

• Proper ventilation extends shingle lifespan by 3-5 years
• Prevents ice dams and reduces energy costs
• Building code requires balanced intake and exhaust
• We include ventilation assessment with every quote

Yes, asphalt shingle installation is possible in winter with proper precautions. Shingles seal best above 10°C, so we store materials in heated spaces and hand-seal tabs in cold weather. Ice and water shield and underlayment require special cold-weather products. We avoid installation during snow, freezing rain, or extreme cold (below -10°C). Spring and fall offer ideal conditions, but winter work is feasible when done correctly.

• Possible with proper techniques and cold-weather materials
• We hand-seal shingle tabs below 10°C for proper adhesion
• Avoid extreme cold (below -10°C) and active precipitation
• Spring (April-June) and fall (Sept-Oct) are ideal in Ontario