| Quick Answer: The cost of a roof replacement in Gatineau depends mainly on the size and pitch of your roof, the material you choose, how many old layers must be removed, and the condition of the deck underneath. Asphalt shingles are the most affordable option and metal costs more upfront, but the only accurate number comes from an on-site measurement and a detailed written quote. Be wary of a price given sight-unseen or a quote that looks too cheap to be complete. |
What determines the cost of a new roof?
No two roofs cost the same, because the price is built from several factors specific to your home. The biggest driver is simply size — measured in roofing “squares” of 100 square feet — followed by the material you select and the complexity of the roof. A steep, multi-level roof with several valleys, dormers, chimneys and skylights takes more labour and more flashing detail than a simple low-slope bungalow, so it costs more even at the same square footage. GAF, North America’s largest roofing manufacturer, lists home size, material, slope and your local market as the main factors that shape a roof replacement cost (see GAF’s roof cost guide).
- Roof size and number of squares — the single biggest factor.
- Material chosen — asphalt shingle, metal, or flat-roof membrane.
- Pitch and complexity — valleys, dormers, chimneys and skylights add labour.
How does material choice change the price?
Material is the most variable line on any quote. Asphalt shingles are the most popular and typically the most affordable choice in the Outaouais, which is why most homes here use them. Metal roofing costs more upfront, but it lasts far longer, so it often wins on cost-per-year over the life of the roof. Flat sections may need an elastomeric membrane system, which is priced differently again. The right material depends on your budget, how long you plan to stay, and the shape of your roof.
What hidden costs should you watch for?
The cheapest quote is not always the best value, because a low number sometimes leaves work out. A complete replacement includes tearing off the old roofing, disposing of it, repairing any rotted decking discovered underneath, and installing underlayment, ice-and-water shield at the eaves, flashing and ventilation — not just laying new shingles. A quote that omits tear-off, disposal or deck repair can balloon once work begins. Ask for an itemized written estimate so you can see exactly what is and isn’t included.
- Tear-off and disposal of the old roof.
- Decking repair if rot or damage is found after tear-off.
- Underlayment, eave protection, flashing and ventilation.
Why can’t a roofer quote a price over the phone?
An accurate roof replacement cost requires measuring the roof and assessing its condition, which can’t be done sight-unseen. A reputable contractor measures the surface — often using satellite or drone tools plus an on-site look — checks the slope and the state of the existing roof, then builds the estimate from materials, labour, disposal and any permits. A firm number handed to you before anyone has seen the roof is a warning sign, not a convenience. Cossette Roofing provides a free, no-obligation inspection and a detailed written quote so you know the real figure for your home.
How can you keep a roof replacement affordable?
Getting good value is less about chasing the lowest bid and more about comparing complete quotes on equal terms. Ask two or three licensed contractors for itemized written estimates that cover the same scope, so you are comparing like with like rather than one full quote against another that quietly excludes tear-off or deck repair. Replacing before the old roof fails completely also helps, because emergency work and interior water damage cost far more than a planned project. Timing matters too: booking earlier in the season, rather than after the first storm of fall, usually gives you more scheduling flexibility and a calmer decision. Finally, ask each contractor to explain the warranties included, since a slightly higher quote that comes with a solid workmanship warranty can be better long-term value than a bare-bones price.
Frequently Asked Questions
Is asphalt or metal cheaper for a roof replacement?
Asphalt shingles are cheaper upfront. Metal costs more initially but lasts longer, so it can be better value over the life of the roof.
Does removing the old roof add to the cost?
Yes. Tear-off and disposal are part of a complete replacement and should appear on your itemized quote, not as a surprise later.
Will I pay more if my deck is rotted?
Possibly. Rotted decking found after tear-off must be replaced for the roof to perform, so a good quote explains how that is priced.
Can I get an exact price online?
Online tools give rough ranges only. An accurate price needs an on-site measurement and inspection of your specific roof.
Does Cossette Roofing give free quotes in Gatineau?
Yes. Cossette provides a free, no-obligation inspection and a detailed written estimate for homes across the Outaouais and Ottawa.
Key takeaways
- Roof size, material, pitch and complexity are the main cost drivers.
- Asphalt is cheapest upfront; metal costs more but lasts far longer.
- A complete quote includes tear-off, disposal, deck repair and ventilation.
- Only an on-site measurement gives an accurate price — avoid phone quotes.