Flat Roof Replacement in Calgary
Tear-off and replacement of failing flat roofs with new SBS or TPO systems for commercial, multi-family and residential buildings.
Flat Roof Replacement in Calgary: SBS, TPO and EPDM Systems
A New Flat Roof, Built for Calgary Weather
When a flat roof keeps leaking, holds water or has simply run out of life, patching it again only buys time. Iron Shield Roofing handles flat roof replacement for commercial, multi-family and residential buildings across Calgary, Airdrie, Cochrane, Okotoks and the surrounding area.
Is It Time to Replace Your Flat Roof?
Calgary flat roofs take a beating. Hail, heavy spring snow, strong winds and chinook swings that freeze and thaw the membrane over and over all shorten its life. These are the signs we look for before recommending a replacement:
- Leaks that come back after repairs, or new ceiling stains after every storm
- Blisters, splits or open seams across large areas of the membrane
- Water that sits on the roof for days after rain or snowmelt
- Wet or crushed insulation and rising heating bills
- A roof that is 20 years old or more
If you are seeing two or more of these, call us. We will tell you straight whether a repair will do or whether replacement is the better spend.
How a Flat Roof Replacement Works
No surprises, no guesswork. Here is how a Calgary flat roof replacement runs with Iron Shield:
- Free Replacement Estimate
We come out, look at the roof, the drains and the deck, and answer your questions on site. - Written Quote
You get a clear quote with the system, scope, schedule and price spelled out before any work starts. - Tear-Off and Deck Check
Our crew removes the old roof, checks the deck and replaces any damaged sections before the new system goes on. - New Roof Installation
We install the membrane system that suits your building, following the manufacturer's specifications and Alberta building code. - Final Walkthrough and Warranty
We walk the finished roof with you, show you the details that matter and back the job with our workmanship warranty.
Why Calgary Owners Choose Iron Shield
🔨 Flat Roofs Are Our Core Work
Flat and low slope roofs make up most of what we do. We build them to handle hail, snow load and freeze-thaw cycles, not just to pass a final inspection.
🧱 Proven Membranes
We install systems from established manufacturers including Soprema, Carlisle SynTec, Elevate and IKO.
🤝 Straight Answers
You deal with real people who return calls, explain your options and keep your site clean while the work is underway.
📍 Calgary and Area
We work across Calgary, Airdrie, Cochrane, Okotoks, Chestermere, Strathmore, High River, Rocky View County and Foothills County.
Get a Free Flat Roof Replacement Estimate
Property manager, condo board, business owner or homeowner, we will give you a clear picture of what your flat roof needs.
📞 Call the Calgary team at 1-888-4-ROOFER or 📩 request your estimate online.
Signs Your Calgary Flat Roof Needs Replacing
Other problems are quieter. A worn flat roof can let moisture into the insulation for months before a stain ever shows up inside, and the first sign may be in the building rather than on the roof.
Higher heating and cooling bills
Drafts near the top floor
Damp or humid air
Uneven temperatures between rooms
Frost on the underside of the deck
Birds or pests getting in
Drips or ceiling stains
Creaking or popping overhead
Flat Roof Systems We Install in Calgary
Every building is different, so we match the roof system to the building, its use and your budget. Here are the flat roof systems we install when replacing a roof in Calgary and area.
SBS MODIFIED BITUMEN (STYRENE BUTADIENE STYRENE) ROOFS
SBS modified bitumen is a two-ply (sometimes three-ply) system of reinforced, rubber-modified asphalt sheets. The SBS polymer keeps the membrane flexible in cold weather and helps it shrug off foot traffic and hail.
It is one of the toughest flat roof systems available and a strong choice for Calgary commercial and multi-family roofs.
EPDM (ETHYLENE PROPYLENE DIENE MONOMER) ROOFS
EPDM is a synthetic rubber membrane that stays flexible through hot summers and deep cold snaps. It expands and contracts with temperature swings without cracking, which suits Calgary's chinook-driven freeze-thaw cycles.
It also works well on roofs crowded with vents, curbs and equipment, because it forms easily around penetrations.
PVC (POLYVINYL CHLORIDE) ROOFS
PVC is a single-ply membrane with heat-welded seams that resists oils, grease and many chemicals. That makes it a good fit for restaurants and buildings with exhaust or process equipment on the roof.
Its reflective surface also helps keep cooling costs down in the summer.
TPO (THERMOPLASTIC POLYOLEFIN) ROOFS
TPO is a single-ply membrane with heat-welded seams and a bright, reflective surface. It resists punctures and tears and keeps buildings cooler in summer.
TPO is a popular, cost-effective option for warehouses, retail units and other large commercial roofs in Calgary.
TAR AND GRAVEL (BUILT-UP) ROOFS
Tar and gravel, or built-up roofing, layers asphalt and felts with a gravel surface. Many older Calgary buildings still have one.
When these roofs reach the end of their life, we can repair them or replace them with a modern membrane system.
About Iron Shield Roofing
We treat every job like it is our own building. That means clear quotes, honest advice, tidy sites and crews who care about the details. Your roof protects your tenants, staff, customers and family, and we take that seriously.
1. No Roof Too Big or Too Small
From a small office or garage to a large industrial or multi-family building, we have the crew and the equipment to handle it. Complex roofs with lots of equipment, multiple levels or tricky drainage are part of the job.
2. Quality Materials, Fair Pricing
A new roof is a big investment, whether it is planned or forced on you by a storm. We help you choose a system that will last without paying for more roof than you need.
We install SBS modified bitumen, EPDM, PVC, TPO and built-up systems, and we will walk you through the pros and cons of each for your building.
A well-built roof should protect your building for decades. Spending a little more on the right system up front usually saves money over the life of the roof.
3. Backed by Our Workmanship Warranty
Every flat roof replacement is backed by our workmanship warranty (lifetime on residential roofs for as long as you own the home, 10 years on commercial and multi-family roofs). That is on top of any manufacturer's warranty on the materials. If something is not right with our work, we come back and fix it.
Built for the Long Haul
Our Service Area
Flat Roof Replacement in Calgary: Frequently Asked Questions
Common questions from Calgary property owners about replacing a flat roof.
How long does a flat roof replacement take in Calgary?
Most homes and small commercial roofs take two to five working days. Larger commercial and multi-family roofs are scheduled in phases. Weather, roof size and deck repairs all affect the timeline, and your quote spells it out.
Do you remove the old roof or go over it?
In most cases we tear off the old roof so we can check the deck and insulation. A recover over the existing roof is only an option when the existing layers are dry and the building code allows it.
Which flat roof system is best for Calgary hail?
Two-ply SBS modified bitumen is one of the most hail-resistant flat roof systems. TPO and EPDM also perform well with the right cover board underneath. We recommend a system based on your building and budget.
Is the replacement estimate free?
Yes. Replacement estimates are free. Roof inspections and leak investigations are a paid service, and we quote the fee before we book.
What warranty comes with a new flat roof?
Our workmanship warranty is lifetime on residential roofs for as long as you own the home, and 10 years on commercial and multi-family roofs. Manufacturer warranties on the materials are in addition to that.
