Calgary · Flat Roofing
Flat & Low-Slope Roofing in Calgary
Commercial low-slope shingle systems built over a full deck of ice-and-water shield - membrane-level protection at a shingle-level price.
WCB Covered
WCB #9259474
Local Calgary Crew
No storm chasers
Written Estimates
No-obligation quotes
Full-System Builds
Down to the deck
Full ice-and-water low-slope shingle systems
Core Armour Exteriors Inc. is a Calgary flat roofing company specializing in commercial low-slope shingle systems - a durable, cost-effective alternative to traditional SBS and EPDM membranes. On low-pitch commercial roofs, we install low-slope-rated asphalt shingles over a full deck of ice-and-water shield, not just the 36 inches of membrane that building code requires at the eaves.
That single upgrade turns the entire roof into a waterproof surface underneath the shingles, giving you membrane-level protection at a shingle-level price.
- 100% ice-and-water deck
- Low-slope-rated shingles
- No open-flame torch work
- Flat roof repair too
WCB Covered
WCB #9259474 · Zero liability to you
The advantage
Why this beats standard SBS and EPDM for many buildings
For the right roof, our full-membrane shingle system delivers several clear advantages.
Lower cost
You get a fully waterproofed deck without paying the premium of a two-ply SBS or fully-adhered EPDM system.
A redundant waterproof layer
The shingles are the first line of defence; the continuous ice-and-water membrane is a sealed backup across the entire roof.
Proven materials
Asphalt shingles and self-adhering membrane are well understood, widely available, and easy to service.
A cleaner install
No open-flame torch-down work over an occupied commercial building.
Familiar curb appeal
A finished shingle surface that looks like a quality residential roof, not exposed black rubber.
Our specialty: full ice-and-water shingle systems
Most low-slope commercial roofs in Calgary are built with SBS modified bitumen or EPDM rubber. Both work - and both come with a higher material and labour cost, plus torches, adhesives, or heat welding on your building.
On qualifying low-slope roofs, we apply self-adhering ice-and-water shield across 100% of the roof deck, then install low-slope-rated shingles on top. By carrying the membrane edge to edge - over the field, the valleys, and every penetration - we eliminate the vulnerable seams where low-slope roofs typically start to leak. The shingles handle the sun, wind, and hail; the continuous membrane underneath handles the water.
Is your building a candidate?
This system is ideal for commercial and multi-unit buildings with low-slope roofs that still shed water in one direction - the kind of pitch that's too shallow for a standard shingle install but doesn't demand a full membrane system.
During our assessment we confirm the slope, check the current roof and deck condition, and tell you honestly whether our full ice-and-water shingle system is the smart choice or whether your building genuinely needs a membrane. You get a recommendation based on your roof, not on what we'd prefer to sell.
Flat roof repair in Calgary
Not every low-slope roof needs replacing. We also handle flat roof repair across Calgary - tracking down leaks, resealing failed flashing and penetrations, and correcting the seam and edge details where water is getting in.
If a repair will genuinely buy you good years, we'll repair it. If the roof is at the end of its life and repairs would just be throwing money at it, we'll say so and show you the numbers on a full system instead.
Engineered for Alberta
Built for Calgary's climate
Low-slope roofs are the hardest-working surfaces on any Calgary building - holding snow load through winter, enduring standing meltwater during chinooks, and taking the full force of summer hail with no steep pitch to help water run off.
Snow & meltwater
A continuous, self-adhering barrier doesn't rely on a dozen field seams staying watertight through freeze-thaw.
Summer hail
Low-slope-rated shingles take the impact up top while the sealed membrane protects the deck below.
Sealed, not seamed
That's why we trust a full ice-and-water membrane as the foundation of every low-slope roof we build.
Flat Roofing
Flat Roofing in Calgary
A sample of our recent work - real roofs on real Calgary homes.
Why homeowners choose us
A system that reduces your risk
Commercial roofing is a decision about risk - the cost of the roof versus the cost of what's underneath it when water gets in. Core Armour Exteriors Inc. reduces that risk with a system that waterproofs the whole deck and a crew that installs it correctly.
We keep the job clean, safe, and on schedule around your operations, so your business keeps running while we work.
Fully WCB-covered
WCB #9259474 - your business carries no liability for workers on site.
Whole-deck waterproofing
A sealed ice-and-water barrier across 100% of the roof, not just the code-minimum eaves.
Installed correctly
A crew that understands low-slope detailing and builds every seam and penetration to last.
Clean and on schedule
We work around your operations and keep the site safe and tidy throughout.
Free & no obligation
Get your flat roofing quote
Talk to a local Calgary roofer today. We'll assess your roof, give you a straight answer, and put a written, itemized estimate in your hands - with no pressure and no obligation.
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Related roofing services
Core Armour handles every part of keeping a Calgary roof watertight.
Roof Replacement
Full tear-off and rebuild with a complete weatherproofing system and architectural shingles built for Alberta.
Explore Roof Replacement
Roof Repair
Leaks, storm damage, flashing failures, and emergency fixes - we find the real source and fix it right.
Explore Roof Repair
Hail Restoration
Full storm restoration with thorough documentation and adjuster support through your insurance claim.
Explore Hail Restoration
Roof Inspection
Honest, documented, top-to-bottom assessments for storms, home sales, and peace of mind.
Explore Roof Inspection
Skylights
Watertight skylights installed, replaced, and repaired by roofers who get the flashing detail right.
Explore Skylights
Attic Services
Balanced intake and exhaust airflow plus insulation that protects your roof and lowers energy bills.
Explore Attic Services
Let's protect your home
Get a free, no-obligation estimate
Tell us what your roof needs. We'll inspect it, explain what we find in plain language, and give you a written estimate you can trust - anywhere in Calgary.