Best Flat & Low-Slope Roofing Contractors in Laval
The 9 best flat & low-slope roofing contractors serving Laval, QC — independently researched and ranked. No paid placements.
Flat and low-slope roofing in Laval relies on membrane systems — TPO, EPDM, modified bitumen, and built-up roofing — common on commercial buildings and many modern homes. The 9 contractors below were selected from our full Laval top 10 as the strongest for flat & low-slope work, ranked by experience, manufacturer certifications, BBB standing, and verified reputation.
Flat roofing in Laval represents one of the more technically demanding versions of the specialty anywhere in North America. The Île Jésus climate delivers long winters with substantial snow load, freezing-rain events that coat membranes with ice, and spring melt sequences that push large volumes of water through internal drains and scuppers in short windows. A flat or low-slope membrane on a Laval plex, commercial building, or residential addition must be engineered for cold-temperature flexibility — a membrane that stiffens or cracks at low temperature will develop seam failures at precisely the moments when water pressure is highest. Elastomeric SBS modified-bitumen and Soprema-certified systems dominate the local commercial and multi-residential market for this reason.
Laval's diverse housing and commercial stock means flat roofing appears in a wide range of contexts: the many duplexes and triplexes across the city, low-slope sections on contemporary residential construction, commercial plazas and office buildings in Chomedey and Duvernay, and industrial properties in Saint-François. Each building type has specific drainage requirements, structural load considerations, and — under Quebec's RBQ licensing regime — a regulated framework for who can legally perform and warranty the work. For property owners and building managers in Laval, understanding both the physical demands on the membrane and the regulatory requirements for the contractor is the foundation of a sound flat-roof decision.
Founded in 1924, René Perron Couvreurs is the longest-established roofer on this list and a recognized name across Montreal, Laval and the North and South Shores. The company holds RBQ licence 1117-5833-85 and is a certified installer for IKO, Soprema, Firestone and Mule-Hide. It has been named Consumer Choice on the Island of Montreal for 17 consecutive years and handles flat roofs, sloped roofs, slate, steel, insulation and emergency work.
Based on rue Michelin in Laval, Les Couvreurs Duro-Toit has more than 20 years of experience in flat and sloped roofing for residential and commercial properties. Its crews are RBQ-certified, and the company lists manufacturer certifications spanning GAF, IKO, BP, CertainTeed, Owens Corning, Soprema, Carlisle and Firestone. It was elected Consumer Choice each year from 2020 through 2025 and provides infiltration repair, ventilation, insulation, snow removal and emergency service.
Roof ReplacementRoof RepairFlat RoofingAsphalt ShinglesRoof MaintenanceVentilationSnow RemovalEmergency Service
Founded and based in Laval, Couvreur GP Inc. brings more than 25 years of experience across residential, commercial and industrial roofing. It holds RBQ licence 8299-4377-33, is a certified BP (Weather-Tite) and IKO (Roofpro Privilège) installer, and is a member in good standing of the APCHQ, ACQ and CCQ. The company works in asphalt shingles, elastomeric membrane, asphalt and gravel, TPO and EPDM, with 24/7 emergency service.
Roof ReplacementRoof RepairAsphalt ShinglesFlat RoofingTPO RoofingEPDM RoofingEmergency Service
Operating since 2005 from rue Marcel-Benoît in Laval, Couvreur Couv-Toit specializes in asphalt shingles, TPO and elastomeric membrane roofs. The company holds a valid RBQ licence, is a member of the APCHQ and is recommended by CAA-Québec. It is certified by IKO, BP, Firestone and Soprema and serves Laval neighbourhoods including Chomedey, Pont-Viau, Laval-des-Rapides, Fabreville and Sainte-Rose, with 24/7 emergency service.
Roof ReplacementRoof RepairAsphalt ShinglesTPO RoofingFlat RoofingSnow RemovalEmergency Service
Based on avenue Valleyfield in Laval, Couvreur Denis Courville Inc. holds RBQ licence 8000-4237-46 and is listed as a CAA-Québec approved residential supplier. The company installs, replaces and repairs roofs designed for Quebec winters, working in elastomeric and TPO membrane, asphalt and gravel and asphalt shingles. It provides free estimates and written guarantees for homeowners in Laval, Montreal and on the North Shore.
Operating since 1991 from Mirabel, Toitures Président brings more than 30 years of experience to residential, commercial and industrial roofing across Greater Montreal, with service extending from Laval to Saint-Jérôme. The company is RBQ-certified and recognized as a GAF Master Elite contractor. Its work includes roof replacement and repair, preventive inspection, insulation, ventilation and 24/7 emergency service.
Roof ReplacementRoof RepairAsphalt ShinglesFlat RoofingRoof InspectionVentilationEmergency Service
Clinique de la Toiture FCA holds RBQ licence 8006-5543-06 and specializes in flat roofing for residential, commercial, industrial and multi-unit buildings serving Laval, Montreal, Terrebonne and Blainville. Its expertise covers TPO, EPDM, elastomeric membrane, asphalt and gravel, green roofs, white roofs and rooftop terraces. The company emphasizes roofing built for Quebec's freeze-thaw cycles, snow loads, freezing rain and high winds.
Headquartered on Montée Masson in Laval, Toitures LV holds a general contractor construction licence and offers one of the broadest service ranges on this list. Beyond roof replacement and repair, it handles inspections, skylights, gutters, soffits, fascia, insulation, heating-cable installation, snow removal and de-icing for residential and commercial buildings. The company provides 24/7 emergency service year-round across Laval, Montreal and the North and South Shores.
Roof ReplacementRoof RepairFlat RoofingEavestroughSkylightsInsulationSnow RemovalEmergency Service
Founded in 2006, Demos Roofing (Couvreurs Demos) specializes in flat roofs with tar and gravel and elastomeric membrane, alongside asphalt shingle and metal roofing. The company states it is insured up to $1,000,000 and serves Laval, Montreal, the South Shore, North Shore and West Island. It offers roof repair, installation, inspection, snow removal and emergency work seven days a week.
Flat RoofingRoof RepairAsphalt ShinglesMetal RoofingRoof InspectionSnow RemovalEmergency Service
Flat and Low-Slope Roofing in Laval: Elastomeric Membrane, Freeze-Thaw Cycling, and the Quebec Regulatory Framework
When spring thaw reveals interior water infiltration on a plex or commercial building that was leak-free through the winter
Spring melt in Laval creates hydraulic conditions that winter does not: large volumes of snowmelt concentrated at drain locations, ice dams at parapet bases releasing suddenly, and membrane seams that were effectively sealed by ice coming under flow pressure for the first time. A flat roof that showed no winter leaks can fail in March precisely because melt conditions test different points in the assembly. Post-winter inspection before the construction season gets busy is the right time to find and address these failures before they compromise the insulation layer or interior finishes.
When planning a Laval plex re-roofing project where multiple units share the membrane
Multi-unit residential buildings in Laval where flat-roof maintenance is a shared ownership responsibility require a flat-roof contractor who understands both the technical specifications for the building type and the documentation requirements for a multi-owner project. RBQ licence verification, CNESST coverage for the crew, and a clear warranty document that identifies which components are covered for what duration are all non-negotiable in this context, particularly when the work will be subject to review by a co-ownership syndicate or property manager.
Before a winter season when the building already has a history of ice-dam leaks at the parapet
Ice-dam formation at the base of parapet walls on Laval flat roofs is a structural and drainage problem as much as a membrane problem. If counter-flashings are not adequately turned into the parapet and sealed, if the cant strip at the wall-to-roof transition is inadequate, or if the parapet itself lacks sufficient insulation, ice dams will recur regardless of membrane quality. Addressing the root conditions before the next freeze-thaw season requires a contractor who understands the full building envelope context, not just the membrane surface.
Frequently Asked Questions
How many flat & low-slope roofing contractors are in Laval?
Our directory lists 9 independently verified flat & low-slope roofing contractors serving Laval, Quebec, ranked by experience, certifications and reputation. René Perron Couvreurs is ranked #1. There are no paid placements.
How do I choose a flat & low-slope roofer in Laval?
Confirm licensing and insurance for Quebec, ask for flat & low-slope project references in Laval, get multiple written quotes, and check each contractor's BBB standing. Every company listed here has been independently researched.
What membrane systems perform best on Laval flat roofs given the freeze-thaw climate?
SBS modified-bitumen elastomeric membrane is the most widely specified system on Laval residential and light-commercial flat roofs because its rubberized bitumen compound remains flexible at low temperatures, resisting the cracking and seam separation that can occur with less flexible systems under freeze-thaw cycling. Two-ply torch-applied or cold-applied systems from manufacturers like Soprema, IKO, and Fransyl are common among established Laval contractors. TPO single-ply is an option on some commercial applications where reflectivity and weld-sealed seams are priorities, and traditional asphalt-and-gravel built-up remains on many older commercial buildings.
Must a flat-roof contractor in Laval hold an RBQ licence?
Yes. Any roofing contractor performing construction work in Quebec, including flat-roof installation and major repair, must hold a valid RBQ licence from the Régie du bâtiment du Québec. Roofers typically carry the 7.0 subclass covering insulation, waterproofing, coverings and exterior cladding. The licence number should appear on any quote or contract, and can be verified at rbq.gouv.qc.ca. Crews must also be covered under CNESST and operate under CCQ competency requirements. Property owners who hire unlicensed contractors assume legal and financial exposure if a worker is injured on their property.
How does snow removal factor into flat-roof maintenance for a Laval building?
Snow accumulation on flat roofs is a genuine structural consideration in Laval, particularly after prolonged snowfall or when rain-on-snow events add weight to an already-loaded roof. Many established Laval flat-roof contractors offer scheduled snow-removal (déneigement) services as part of a maintenance agreement — this is more common here than in milder Canadian cities precisely because the load accumulation risk is real. A maintenance agreement that includes post-storm inspection and snow removal as needed is a reasonable risk management tool for commercial property owners managing older buildings whose structural design assumptions predate modern load calculations.