An estimate in under a minute
Roof replacement cost calculator
Answer a few questions and see a realistic price range for Quebec right away. No contact details asked, the result shows up on screen.
- No contact details
- Quebec prices
Estimated cost of the work
$8,500to$14,500
Materials, tear-off and labour included, before taxes.
Prices based on the 2026 market
1 to 3 days on the roof
Where the money goes
- Labour$4,100
- Roofing materials$3,900
- Tear-off and disposal$1,200
- Flashing, venting and accessories$1,000
- Decking replacement$1,100
Typical split, worked out from the middle of the range.
Describe your work once, and contractors in your area who do this kind of work can get back to you. It's free, with no commitment.
Post a projectThis range is a guide, not a quote. The real price depends on how many layers come off, the state of the decking, the chimneys and dormers to work around, and how booked the roofers are. Only an on-site visit gives you a real number.
What moves the price
01
What turns up under the old roofing
Nobody sees the decking before tear-off. A serious quote gives you a price per plywood sheet replaced, instead of pretending everything underneath is fine.
02
The details on the roof
Every chimney, dormer, skylight or valley needs flashing done by hand. Two roofs with the same surface can come in at very different prices.
03
The season
Roofers are swamped from May to October. A quote signed in winter for the spring is easier to negotiate, and you don't wait while it leaks.
04
Attic ventilation
A poorly vented roof grows ice dams, swells the decking and wears shingles out twice as fast. Redoing the roof without fixing the venting means paying to redo it sooner.
Talk to someone who does this every week
A roof involves roofing, flashing and sometimes the framing. These are the trades to call.
Frequently asked questions
How much does a new roof cost in Quebec?
It mostly comes down to roof size, material and the state of the decking. The calculator above gives you the range for your own choices. A flat or steel roof costs noticeably more to install than asphalt shingles, but it lasts longer.
How do I know my roof needs replacing?
Curling shingles or shingles shedding granules, stains on the upstairs ceiling, heavy ice dams in winter or a wavy roofline are the signs to watch. Past 20 years, asphalt shingles are at the end of their life, even without a visible leak.
Can new shingles go over the old ones?
It is possible over a single layer, but most serious roofers advise against it. You can't see the decking, the roof gets heavier, and many manufacturers cut their warranty when it's done.
Do I need a permit?
Many municipalities ask for a permit or a simple work declaration for a new roof, especially when the material changes. Call your municipality before signing: the rules differ from one town to the next.
What's the best season to redo a roof?
From late spring to early fall, when shingles seal well. Winter installs are possible with precautions, but the best move is to book your roofer early in the year so you're not waiting in peak season.
Does the roofer need an RBQ licence?
Yes, a roofer doing the work for you must hold an RBQ licence with the roofing subcategory. Check it before signing, and ask for proof of liability insurance.
Post your project
Describe your work once, and contractors in your area who do this kind of work can get back to you. It's free, with no commitment.
Post a project