Our roofing services
From the first assessment to a full replacement: explore services for your flat or low-slope roof.
TPO membrane for flat roofs
Understand roof layers, welded seams and waterproofing details.
Explore TPO01Flat roof replacement
An ageing roof deserves a complete assessment before you decide on the work. Alliance Roofing helps you plan a flat or low-slope roof replacement around the condition of the roof, the needs of your building and your budget.
Explore the service02Roof repairs and water infiltration assessment
A ceiling stain does not always reveal where water entered. Planning an effective roof repair starts with understanding when the leak occurs and examining the relevant details. Describe the problem to Alliance Roofing so we can help identify the next step.
Explore the service03An urgent roof leak? Tell us what is happening.
Is water entering your building? Call Alliance Roofing at 514 556-2864 to explain the situation and check availability. For an active problem, calling lets you share essential information without waiting for a website request to be reviewed.
Explore the service04Flat roof slope and drainage
Does water remain in certain areas of your roof? Drainage deserves attention alongside the rest of the roof assembly. Alliance Roofing can help you prepare an assessment of the affected areas and discuss potential work as part of your roofing project.
Explore the service05Flat roof inspection and maintenance
Want a clearer understanding of your roof before deciding what to do? An inspection helps document visible conditions and establish priorities. Alliance Roofing helps you approach maintenance, repairs and future roofing work with a more informed plan.
Explore the service06Commercial roofing planned around your operations
A commercial roofing project needs to account for the building and the people who use it. Alliance Roofing handles enquiries for flat and low-slope roof replacement with attention to the scope of work and the practical organization of the project.
Explore the service07Elastomeric membrane for flat roofs
A modified-bitumen roofing project starts with an assembly that suits the building. Compare system options, installation details and replacement scope before deciding.
Explore the service08Tar and gravel roofing
Does your tar and gravel roof need attention? Understand its condition, possible repairs and what to plan when transitioning to a new membrane.
Explore the service09Flat roof insulation and vapour control
Replacement is an opportunity to review insulation, slopes and moisture control. The assembly should be designed as a whole, rather than simply adding thickness.
Explore the service010Roof flashing, parapets and connections
Roof junctions deserve as much attention as the main surface. Plan an assessment of flashings, copings and penetrations for a coherent waterproofing system.
Explore the service011Roof drain maintenance and water drainage
Accessible drains and outlets help with flat-roof maintenance. Debris, persistent water and overflows should be assessed to understand what is obstructing drainage.
Explore the serviceLet’s talk about your project, priorities and next steps.
514 556-2864
A question about your roof?
Explore answers about materials, moisture, roof details, winter and project preparation.
Browse roofing questions