Top 5 Roofing Companies in Calgary

Five roofing companies to compare in Calgary are listed below by the project types they advertise. This shortlist helps you prepare comparable questions and bids; it does not establish an independently measured citywide winner. For a broader searchable comparison, use the Calgary roofing contractor directory.

Evidence checked 15 October 2026: the service descriptions below come from the linked company websites. A company's statement about its own services is not independent verification of workmanship, current insurance, licence status or customer satisfaction. We have removed unsupported superlatives and undated review/BBB snapshots. Read the directory methodology and editorial policy.

Match the Shortlist to Your Project

Companies are shown alphabetically. Their order is not a quality score.

Company	Advertised service fit	Question to ask before comparing bids
CMP Roofing	Commercial flat-roof installation and replacement.	Which complete membrane/insulation/attachment system is proposed, and who supplies the warranty?
Epic Roofing & Exteriors	Residential roofing and exterior work; its site also describes commercial services.	Can the roofing and siding/gutter scope be separated in writing, including responsibility for interfaces?
Fortress Roofing & Exteriors	Roofing and exterior renovation services.	Which roofing and exterior tasks will the company's own crew perform, and which use subcontractors?
Great Canadian Roofing & Exteriors	Roofing and wider exterior services in Western Canada.	Which local branch and supervisor will manage this Calgary project and any later service call?
National Star Roofing	Calgary roof replacement, repairs and roofing services.	Can you show a recent completed roof with the same covering, pitch and detailing as mine?

Availability, project size, exact products and service areas can change. Confirm them directly. This is a five-company starting list, not a survey of every Calgary roofer or an inspection of their completed work.

Check Credentials Before Asking for a Final Quote

The City says contractors must hold a valid Calgary business licence and recommends calling 311 to verify it. Match the legal name on the estimate, insurance documents and invoice; similar trading names can refer to different businesses.

• Ask for the WCB account information and current insurance certificate. Alberta's consumer guidance recommends checking contractor coverage and obtaining written estimates.
• Verify any manufacturer credential with the manufacturer for the exact legal company and proposed system. A badge is not the warranty contract.
• Read current complaint histories and several detailed reviews; ask recent customers about cleanup, communication and resolution of problems. No review totals or BBB grades are reproduced here without a current claim-specific source.
• Obtain a written description of materials, labour, schedule, payment and extra-work approval.

Calgary Permits and Hail Questions

Routine repair or replacement of roofing materials generally does not require a City development or building permit. A change such as replacing shingles with clay roofing does require a building permit. Structural damage needs separate assessment; confirm your actual scope with the City.

For hail-related work, document the affected roof and exterior areas, ask for a repair-versus-replacement explanation and keep the contractor's scope separate from the insurer's coverage decision. The City's climate-ready roof guidance discusses local roof choices; no material label alone guarantees a damage-free roof. See Hail Damage and Roofing.

Compare the Same Written Scope

Send the same description to several suitable companies. Include the roof type, approximate age, known leaks, storm date, photographs taken safely from the ground, and any siding or gutter work needed. Ask each bidder to identify:

• Measured roof area, tear-off layers and disposal.
• Covering manufacturer/line, underlayment, flashing and ventilation.
• Deck-repair allowance and the approval process for hidden damage.
• Workmanship and material warranty terms, exclusions and registration.
• Price in CAD, taxes, payment milestones and proposed timing.

The general cost guide uses U.S. prices in USD; those national figures are not a Calgary quote. Use How to Choose a Roofing Contractor for the full hiring checklist and the Calgary directory for additional companies and contact routes.

Frequently Asked Questions

Which Calgary roofing company is best for my project?

Choose a shortlist by the roof system and work required, then compare current credentials, comparable references and the written scope. This article does not claim one company is best for every homeowner or commercial building.

Are these independent ratings or customer reviews?

No. The table summarizes publicly advertised services checked on 15 October 2026. It is not a customer-review database, workmanship test or a numerical ranking.

Does a Calgary roof replacement always need a permit?

No. City guidance distinguishes routine material replacement from work such as a change from shingles to clay roofing, which requires a building permit. Confirm the specific scope with the City.