Commercial Roof Installation
New builds and full system installs — TPO and flat assemblies specified around the building, not a generic spec sheet.
Learn more →Commercial Roofing Calgary
A commercial roof protects far more than the building it sits on. It protects inventory, equipment, tenants, and the day-to-day operation underneath it. Nagra Roofing provides Commercial roofing Calgary business owners and property managers can plan around — with clear scopes, written pricing, and work scheduled so it interrupts as little as possible.
Written scopes
Work around your hours
Insurance claim help
Commercial services
Every commercial roofing need, under one contractor
Scoped properly up front, priced in writing, and phased so the building keeps working while we do.
Commercial Roof Replacement
Tear-off and re-roof when a system reaches the end of its service life, phased so the building stays usable.
Learn more →Commercial Roof Repair
Leaks, membrane damage, failed seams, flashing and drainage problems — found properly, then fixed.
Learn more →Flat Roofing
Low-slope systems built for Calgary freeze-thaw, from inspection and leak detection to full replacement.
Learn more →Roof Maintenance Programs
Scheduled inspections and preventive work that catch small faults before they close a unit.
Learn more →As a Commercial roofing contractor Calgary companies call for both planned projects and urgent problems, we handle low-slope and flat roofing systems across warehouses, retail units, office buildings, and multi-unit residential properties.
Looking for a Commercial roofer Calgary property managers can call more than once? Most of our commercial work comes from buildings we already inspect, maintain, or have re-roofed — which is the relationship we are after rather than a single job.
What we do
Commercial Roofing Services We Provide
Every property is on a different part of its roofing life cycle. Some need a full system installed, some need one section repaired, and some simply need a maintenance plan so nothing becomes urgent. Our commercial work covers all of it:
- Commercial roof installation — new builds and full system installs, including TPO and flat roofing assemblies.
- Commercial roof replacement — tear-off and re-roof when a system has reached the end of its service life.
- Commercial roof repair — leaks, membrane damage, flashing failures, and drainage problems.
- Flat roofing — low-slope systems specified and installed for Calgary's freeze-thaw cycle.
- Roof maintenance programs — scheduled inspections that catch small faults before they close a unit.
Why choose us
Why Calgary Businesses Choose Nagra Roofing
Commercial work is judged on disruption as much as on workmanship. We scope the job properly up front, tell you what access and downtime it needs, and put the price in writing before anything starts.
Built for Calgary weather
Hail, chinook freeze-thaw swings, and wind all punish low-slope roofs differently than they do steep-slope residential ones. Systems are specified with that in mind rather than to a generic spec sheet.
Work around your operation
Retail units, warehouses and offices cannot simply close for a re-roof. Phasing, after-hours work and staged tear-offs keep the building usable while the work runs.
One contractor, start to finish
From the first inspection through to final flashing and sign-off, the same team is accountable for the result — including insurance claim support when the damage is storm-related.
Inspections & emergencies
Commercial Roof Inspections and Emergency Response
Most commercial roof failures give warning first — ponding water, a lifting seam, a blocked drain. A scheduled inspection finds those while they are still cheap to fix.
When something does go wrong without warning, emergency storm response is available to secure the building and limit interior damage before the permanent repair is scheduled.
Get in touch
Contact Nagra Roofing Today
If you manage a commercial property in Calgary and need a roof installed, replaced, repaired, or simply looked at properly, we can help. Call +1 825 962 2600 or request a written estimate and we will arrange an inspection.
An inspection tells you what the roof actually needs rather than what is easiest to sell. You get the findings in writing, with photographs, and a scope you can put in front of an owner, a board, or an insurer.
Whether it is a single unit or a portfolio of buildings, we will tell you honestly whether the system needs replacing now, repairing, or simply monitoring on a maintenance programme.
Common questions
Commercial Roofing Calgary — FAQs
What types of commercial roofing systems do you work with?
We work with low-slope and flat commercial systems, including TPO membrane and other flat roofing assemblies commonly specified for Calgary warehouses, retail units, and office buildings.
How long does a commercial roof replacement take?
It depends on the size of the roof, the system being installed, and the access available. The timeline is confirmed in the written estimate, along with how the work will be phased around your operation.
Do you offer maintenance contracts for commercial properties?
Yes. Our roof maintenance programs cover scheduled inspections and preventive work, which helps extend the service life of the system and avoid unplanned closures.
Can you help with a commercial insurance claim after hail or wind damage?
We can. Documentation, damage assessment and working alongside the adjuster are all part of our insurance claim assistance.
Should I repair or replace my commercial roof?
That depends on the roof's age, the extent of the damage, how much of the system is affected, and its remaining service life. An inspection is the only reliable way to answer it.
Why Calgary property owners pick Nagra
- Local Calgary crew
- Clear written pricing
- Insurance claim support
- Clean, safe job sites
Recent reviews
Read more reviews →“They re-roofed our warehouse over two weekends so we never lost a shift. Clear pricing and no surprises at the end.”
Daniel R.
Foothills Industrial, Calgary
“Flat roof had been leaking for two winters. They found the actual seam failure, fixed it, and showed us photos of the whole thing.”
Priya S.
Sunridge, Calgary