COMMERCIAL

COMMERCIAL ROOFINGIN CALGARY

We take on commercial and multi-unit roofing in Calgary for property managers, condo boards and general contractors: sloped roofs on multi-unit buildings, flat-roof inspection, documentation and repair, and the exterior around them. Every roof is walked and scoped before it's priced, and storm damage is documented to Haag's published methodology and reviewed by insurance professionals.

What's included

  • Sloped roofing on townhouse and low-rise multi-unit buildings
  • Flat and low-slope inspection, documentation and repair
  • Siding, soffit, fascia and eavestrough
  • A report per building and a roll-up for portfolios

What sets the price

Size, roof type, drainage, deck condition, access, and how much of the work has to be planned around tenants. It's all scoped on site before you get a number.

When to get in touch

  • Leaks or standing water on a flat roof
  • A storm hit several buildings you manage
  • A board needs a documented scope before it decides
  • A replacement coming up in the reserve-fund plan

What happens next

  1. Tell us about the building or portfolio, in the form below.
  2. We walk and scope each roof on site.
  3. You get a written, itemized scope and price.
  4. The work is scheduled around your tenants, in writing.
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A commercial roofing decision has almost nothing in common with a residential one. Nobody is choosing a shingle colour. The questions are whether the work disrupts tenants, whether the contractor's insurance and WCB standing meet your requirements, whether the schedule is real, and whether the paperwork will hold up at a board meeting or an insurer's review.

Standing water pooled beside a rooftop air conditioning unit on a flat roof

What we take on

Across our trades, on commercial and multi-unit property.

  • Sloped asphalt on multi-unit residential, townhouse blocks and low-rise, a straight extension of our residential work at a different scale.
  • Flat and low-slope inspection, documentation and repair: TPO, EPDM, modified bitumen, built-up and PVC. Seams, curbs, drains and flashings, which is where most flat-roof failures are.
  • Siding, soffit, fascia and eavestrough on the same buildings.
  • Permanent exterior LED lighting: one install replacing an annual seasonal contract and the lift booking that comes with it.

Hail documentation at portfolio scale

A hail event hits your buildings and produces as many assessments as there were contractors available that month, with different methods and conclusions that can't be read against each other. We document a portfolio to Haag's published methodology in one pass, reviewed by insurance professionals, with a report per building and a roll-up across them. A board can then decide instead of comparing paperwork that doesn't line up.

What you'll be asked to provide, and what we provide

Commercial procurement asks for things residential never does, so here they are up front.

  • Commercial general liability certificate, with the limit stated. Confirm your contract's required limit early; condo and commercial agreements often require more than a residential job.
  • WCB Alberta clearance letter, current-dated.
  • Alberta prepaid contractor licence where deposits are involved.
  • Safety documentation and a site-specific plan for work at height over occupied space.
  • A written, itemized scope, and a change-order process agreed before anything starts.

Tenant disruption is the real constraint

On an occupied building the roofing is rarely the hard part. The logistics are: where materials land, where the bin sits, which parking stalls come out of service and for how long, how tenants are notified, and whether any of it can happen outside business hours. Torch-applied work adds a hot-work permit and a fire watch. We plan that before the truck arrives and put it in writing.

READ BEFORE YOU DECIDE

Guides from the library

MORE GUIDES ›
A Calgary roof stripped to bare decking during tear-off
BASICS6 MIN
Roofing 101

How a roof works, layer by layer

A sloped roof is a stack of layers, each with one job: the wood deck carries the load and holds the nails, underlayment and ice and water shield back up the shingles, flashing seals the joints, the shingles shed water, and vents keep air moving underneath. Most leaks start at the joints and edges, not in the open field of shingles.

A finished architectural shingle roof on a Calgary home
BASICS5 MIN
Roofing 101

How long does a roof last in Calgary?

By published estimates an asphalt shingle roof lasts roughly 20 to 30 years and metal 40 or more. In Calgary, hail, strong sun, chinook temperature swings and attic ventilation decide how much of that you actually get, and one bad hailstorm can end a roof at any age.

A finished asphalt shingle hip roof on a Calgary home
BASICS5 MIN
Roofing 101

Flat and low-slope roofs, explained

A flat or low-slope roof (anything under a 3-in-12 pitch) can't rely on shingles. It needs a continuous waterproof membrane with sealed seams, such as TPO, EPDM or modified bitumen, and drainage that clears standing water within 48 hours; seams, drains and flashing are the weak points, so check them every spring and fall.

A lifted valley shingle found during a repair
DEEP DIVE5 MIN
Roofing 101

Repair or replace your roof? A decision framework

Repair the roof if the problem is in one place and the rest is healthy; replace it if the same failure shows up across several slopes, the shingles are brittle, the deck is damaged, or there are already two layers. If hail caused it, it's an insurance question first, because shingle warranties exclude hail.

A hail hit circled in chalk on a shingle
BASICS7 MIN
Insurance Claims

The roof insurance claim, step by step

An Alberta roof claim goes in a set order: tell your insurer in writing, stop further damage, document everything, get the roof inspected, agree the scope and estimate, file a sworn proof of loss, then settle and repair. Once a completed proof of loss is delivered, Alberta law says the loss is payable within 60 days unless your policy sets a shorter period.

A roof slope chalk-marked with its elevation letter
DEEP DIVE7 MIN
Insurance Claims

Hail deductibles in Alberta: flat, percentage and why they've gone up

Many Alberta home policies now carry a separate hail deductible, usually a flat amount: industry reports in 2026 put it at $2,500 to $5,000 with many Calgary insurers, and up to $10,000 for homes without hail-resistant construction. Percentage deductibles exist but are less common here, and your hail deductible can change at renewal, so check your declarations page.

QUESTIONS

STRAIGHT ANSWERS.

Do you work with property managers and condo boards?

Yes, and the reporting is built for it: a report per building plus a roll-up, documented to one standard so the documents can be compared. If several buildings were hit by the same storm, ask about a portfolio walk.

Can you do the work outside business hours?

Often, and it's worth raising early because it changes the schedule and the price. Tear-off is loud and it's the part that most affects tenants, so tell us the constraint up front and we'll plan around it.

What insurance limits do you carry?

We carry WCB Alberta coverage and commercial general liability at $2,000,000, with certificates available on request before we attend. Tell us what your contract requires; many commercial and condo agreements set a higher limit than residential work needs.

How do you price commercial work?

After the roof has been walked and scoped. Drainage, deck condition, access and tenant logistics all move the number, and none of them are visible from an aerial photo.

RELATED
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EMAILcontact@bigboyroofing.ca
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