New roof installation in Montreal, Laval and the South Shore
Building new, adding on, or converting a flat roof to a pitched one? We install the complete roofing system, from the framing up to the shingles, built to the snow and wind load standards of Greater Montreal.
- ✔Vapour barrier and self-adhesive underlayment
- ✔Metal drip edge and roof vents
- ✔Compliant with the Quebec Building Code
- ✔10-year workmanship warranty
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RBQ
Licensed & insured
Régie du bâtiment compliant
2M$
Liability coverage
Full job-site protection
10 years
Workmanship warranty
On our installations
★★★★★
Satisfied clients
Verified reviews
6+ ans
Of experience
Since 2020
300+
Roofs completed
In Montreal and nearby
New roof
A new installation leaves no room for error
Unlike a replacement, installing a new roof starts from bare framing: there is no old system to correct if a detail is done wrong, but equally no margin for error once the shingles are down. The membrane, the ventilation and the fasteners installed today will determine how your roof performs for the next 25 to 50 years.
At Toiture AM we work on new residential construction, home additions and flat-to-pitched roof conversions across Greater Montreal, coordinating with your general contractor if your project has one.
When to bring in a new-roof installer
The situations our crews are called in for most often.
New residential construction
Complete roofing system installed on new framing, from the deck all the way up to the shingles.
Home addition
A watertight tie-in between the existing roof and the new section, with no weak point at the junction.
Flat to pitched roof conversion
Rebuilding the framing and roofing system to eliminate the chronic problems of an aging flat roof.
Garage or outbuilding
Installation sized for smaller structures: detached garage, shed, garden studio.
Our installation process
Seven steps, from the first visit to the final cleanup.
Framing inspection
Checking the structure, truss spacing and compliance with the Quebec Building Code.
Detailed quote
Written estimate covering materials, timeline and a guaranteed fixed price — no mid-job surprises.
Material selection
Choosing the membrane, ventilation system and shingle line, with samples to look at.
Deck and vapour barrier
Plywood and vapour barrier installed to give a watertight base from the start.
Underlayment and drip edge
Self-adhesive underlayment and metal drip edge at the rakes and eaves.
Ventilation and shingles
Roof vents and architectural shingles installed to the manufacturer's specifications.
Final inspection
Full check of flashing and valleys, site cleanup, and handover of your warranty documents.
Materials available for your new roof
The four brands we install most often.
BP Building Products
Mystique and Vanguard lines, engineered in Quebec for our climate.
- ✓Wind resistance: 210 km/h
- ✓50-year warranty
IKO Roofing
Cambridge and Dynasty lines, with a reinforced adhesive strip against lifting.
- ✓Wind resistance: 210 km/h
- ✓40–50 year warranty
CertainTeed
Landmark line, holds up well through freeze-thaw cycles.
- ✓Wind resistance: 180 km/h
- ✓50-year warranty
GAF Timberline
The best-selling line in North America, good value for money.
- ✓Wind resistance: 180 km/h
- ✓25–40 year warranty
What to know about installing a new roof
The structure and framing underpin everything
Before shingles even enter the conversation, truss spacing, the plywood used and the planned slope all have to meet the Quebec Building Code. Framing that is undersized for the regional snow load eventually shows up as a sagging deck, no matter how good the covering laid over it.
Attic ventilation: the step most often skipped
A ventilation system balanced between the soffits and the ridge vents carries moisture out and prevents ice dams in winter. On new construction this is the ideal moment to size that ventilation properly from the start, rather than correcting it years later.
Why the vapour barrier changes everything
A self-adhesive vapour barrier laid across the whole deck, and especially at vulnerable spots like rakes and valleys, protects the structure even if shingles are later damaged by high wind. It is a layer of insurance we never leave out.
Coordinating with your general contractor
On a new-build project our crew fits into the overall site schedule: we come in as soon as the framing is ready to take the deck, and coordinate the municipal inspections required before the roof is closed up.
The best time of year to install
Although we install roofs year-round, the spring-to-autumn window lets the shingles' thermal adhesive seal optimally. Adapted methods exist for winter work, but they call for tighter planning.
Indicative price for a new roof installation
Cost depends mainly on the roof area, the number of slopes and the complexity of the framing (dormers, valleys, hips). An estimate given over the phone without a site visit is never reliable — we always measure in person before putting a number on a project.
$9,000 – $22,000
For a typical single-family home in Greater Montreal. Timeline: usually 2 to 5 business days.
New Roof Installation — Areas we serve
We work across the island of Montreal, in Laval and throughout the South Shore.
Frequently asked questions — New Roof Installation
Clear answers to the questions we get asked most about this service.
How much does a new roof installation cost in Montreal?
Expect roughly $9,000 to $22,000 for a single-family home, depending on area, slope and the complexity of the framing. An on-site measurement is always needed for a firm number.
How long does a new roof installation take?
Most residential installations are finished in 2 to 5 business days, depending on size and weather. New-build projects are coordinated with the overall site schedule.
What is the difference between a new installation and a roof replacement?
A new installation goes onto bare framing with no old covering to remove — typically for new construction or an addition. A replacement means fully stripping an existing roof before the new system goes on.
Which materials do you recommend for new construction?
We install BP, IKO, CertainTeed and GAF depending on your budget and the look you want. For new construction we generally recommend an architectural shingle for its better wind resistance and 30 to 50-year service life.
Do you need a permit to install a new roof?
For new construction or an addition, the building permit usually covers all the work including the roof, and is normally obtained by the general contractor or the owner before work starts. We can point you in the right direction for your specific situation.
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Ready to start your new roof installation project?
Get in touch for a free inspection and a detailed quote built around your actual roof.