Commercial Roof Replacement & Recovery in Calgary

Commercial roof replacement and recovery is the point where patch-and-repair stops paying off and re-roofing becomes the smarter investment. CMP Roofing handles full re-roofs and recover/overlay systems for Calgary offices, warehouses, retail centres and industrial plants — replacing tired, leaking roofs with assemblies engineered for Alberta hail, snow load and freeze-thaw, while keeping your business running through every phase of the work.

Signs it's time to replace your commercial roof

A single leak rarely means a new roof — but a pattern of problems usually does. We recommend replacement or recovery when we find:

• Chronic, recurring leaks in multiple areas that keep returning no matter how often they're patched.
• Saturated or compressed insulation — wet insulation loses R-value, rots the deck and can't be dried out.
• End of service life — most commercial membranes last 20–30 years, and repairs on a worn-out roof are throwing good money after bad.
• Widespread blistering, splitting or seam failure across the field of the roof rather than at one isolated spot.
• Rising energy bills from failing insulation and a roof that no longer meets today's energy code.

Full tear-off vs. recover/overlay

There are two ways to re-roof a commercial building, and choosing the right one is the most important — and most expensive — decision you'll make. A recover (overlay) installs a new membrane or coverboard directly over the existing roof. It's faster, generates no demolition or landfill cost, and is usually the more affordable route. A full tear-off strips the roof down to the deck so we can inspect and replace insulation, correct drainage and start fresh.

New membrane & metal options

Whichever route fits your building, we install the system that matches your use and ownership timeline rather than a one-size-fits-all spec. For low-slope roofs that means reflective TPO, durable EPDM, chemical-resistant PVC, or redundant 2-ply SBS modified bitumen. For sloped commercial buildings, standing-seam metal delivers the longest service life and sheds Calgary snow cleanly. Every replacement is detailed for our climate with reinforced flashings and engineered drainage.

Insulation, energy code & solar-ready assemblies

A re-roof is the one chance to upgrade what's under the membrane. We bring insulation up to current Alberta energy code with tapered systems that eliminate ponding water and raise R-value, which cuts heating and cooling costs for the life of the roof. If solar is on your roadmap, we build solar-ready assemblies with the structural detailing and membrane warranty terms that let you add panels later without voiding coverage or re-opening the roof.

Minimizing downtime & resetting your warranty

We phase replacements section by section so the building stays watertight and your operations keep moving — most Calgary warehouses, retail stores and offices stay open throughout. And because a re-roof is a brand-new system, it resets your warranty clock: every replacement is registered for fresh manufacturer material coverage plus our own workmanship warranty, so you start the next 20–30 years protected.

Our re-roofing process

1. Free assessment & moisture scan — we document the roof, deck and insulation condition and confirm whether a recover or full tear-off is the right call.
2. Transparent, itemized quote — system, insulation upgrade, solar-ready options, warranty terms and a phasing plan, with no surprise add-ons.
3. Phased, low-disruption install — scheduled around your operations and kept watertight at every stage by certified crews.
4. Final inspection & warranty reset — we walk the finished roof with you and register your new manufacturer and workmanship warranties.

Why Calgary businesses choose CMP Roofing

• 20+ years and 2,500+ commercial roofs completed across Calgary and Southern Alberta
• Fully licensed, WCB-covered and $10M+ liability insured
• Manufacturer-certified installers — your reset warranty is backed and valid
• Honest replace-or-recover advice and itemized quotes — no pressure, no hidden costs