Q. How much does a flat roof cost in Calgary?

It depends on the size, the membrane, the insulation, the drainage and what is under the old roof. We inspect and give you a clear quote instead of guessing over the phone.

Q. How long does a flat roof last?

Depending on the membrane and the care, flat roofs commonly last 15 to 30 years. Good drainage, flashing and regular inspections make the biggest difference.

Q. What is the best flat roofing material?

There is no single best. TPO is reflective and welded, EPDM is flexible and proven, and modified bitumen is layered and robust. We recommend one for your roof and explain why.

Q. What is ponding water and is it a problem?

Ponding is water that stays on the roof more than a day or two after rain or melt. It shortens the roof's life and can leak, so we find out why it is happening and fix the slope or the drain.

Q. Why does my flat roof leak?

Most flat roof leaks come from seams, flashing at walls and penetrations or a blocked drain, not from the middle of the membrane. We trace the leak to the source rather than patching the stain.

Q. Can you repair a flat roof or does it need replacing?

Often a repair works if the membrane is sound and the leak comes from one seam or flashing. If the membrane is brittle, blistered or wet underneath, replacement is better value.

Q. Can you put a new flat roof over the old one?

Sometimes, but we usually recommend removing the old roof, which lets us check and repair the deck and insulation underneath.

Q. Can I walk on my flat roof?

Light foot traffic is fine on many membranes, but heavy or repeated traffic damages them. Avoid sharp tools, and tell us if you have rooftop equipment that needs a walkway.

Q. Do flat roofs need insulation?

Yes, for comfort and to control condensation. Insulation also lets us build slope with tapered boards so water drains.

Q. Can you add a deck or garden on a flat roof?

Possibly, if the structure can carry the load and the roof is waterproofed properly. A rooftop deck needs engineering and a membrane designed for it, so ask us at the estimate.

Q. How do I clear snow from a flat roof?

Use a plastic shovel, leave a thin layer of snow and avoid chopping ice. Metal tools can cut the membrane. If the roof is high or icy, call a professional.

Q. How do I know if the flat roof deck is wet?

Soft spots, sagging, dark stains inside and a spongy feel underfoot suggest the deck or insulation is wet. We can check with a moisture inspection and replace what has soaked.

Q. Do you do flat roofs on garages?

Yes. Detached garages often have flat or low-slope roofs, and we repair and replace them as well as build new garages.

Q. Do you do commercial flat roofs?

We repair and replace flat roofs on small commercial buildings. Tell us about the building and the problem, and we will say whether it fits our work.

Q. What if my flat roof has hail damage?

Hail can bruise and puncture membranes. We inspect, photograph the damage and give you an estimate for your claim. Our hail damage page explains the process.

Q. What is the difference between a flat roof and a low-slope roof?

A flat roof has almost no slope, and a low-slope roof has a small pitch, usually under about 3 in 12. Both use membrane roofing instead of shingles, and both need good drainage and careful flashing.

Q. Can a flat roof leak without any visible damage?

Yes. Water can enter at a seam, a flashing or a penetration and travel along the deck before it shows up inside, which is why we trace the leak rather than patch where the stain appears.

Q. How often should a flat roof be inspected?

At least once a year, and after every major storm or heavy snow. A short check of the drains, seams, flashing and any ponding can catch a small problem before it becomes a leak.

Q. Which areas do you serve?

We repair and replace flat roofs in Calgary and in Airdrie, Chestermere, Cochrane and Okotoks, and in the areas between.

Flat Roofing Calgary

Flat Roofs That Drain, Seal and Last

Flat and low-slope roofs have different rules from shingle roofs. Water does not run off quickly, so seams, drains and flashing have to be right, and snow load and ponding water test the roof every winter. Blueprint repairs and replaces flat roofs on houses, garages, additions and small commercial buildings in Calgary and nearby towns. We find the cause of the leak, fix it properly and tell you honestly when a repair is enough and when the membrane needs to be replaced.

Call About a Flat Roof Contact Us

Request a Flat Roof Quote

Tell us about your roof and we will call you back.

Calgary Homeowners Rate Us 5 Stars on Google

         Posted on Google  
   
   Mark Lacerna 
 
 
 
 Trustindex verifies that the original source of the review is Google.  I’m very happy with the siding work done on my home! The contractor was professional, reliable, and paid great attention to detail. The quality of the workmanship was excellent, and everything turned out looking great. Communication was good throughout the process, and the job was completed with care. I would definitely recommend them to anyone looking for quality siding work. Thanks for a job well done!
  
 
 
      Posted on Google  
   
   Reeta Bashyal 
 
 
 
 Trustindex verifies that the original source of the review is Google.  Baljeet and his team did vinyl siding installation in our home. The team is very hard working, detail oriented and gave a great service. Also the work area is very clean with no mess around very well organized. I would definitely recommend them.
  
 
 
      Posted on Google  
   
   Fabiola S 
 
 
 
 Trustindex verifies that the original source of the review is Google.  Great service from the owner. I would recommend this company.
  
 
 
      Posted on Google  
   
   Kelly Mathison 
 
 
 
 Trustindex verifies that the original source of the review is Google.  We had  new gutters and downspouts installed. While they were here,  they also did some repair work on  existing gutters & soffits .
Baljeet & his crew were fast and efficient. They communicated well in advance & throughout the project.
They arrived on time, quote was accurate.
We were very pleased with their work.
Would definitely have them back & would recommend them.
  
 
 
      Posted on Google  
   
   Cam Pepperdine 
 
 
 
 Trustindex verifies that the original source of the review is Google.  There are so many good things to say about Blueprint Construction and it is impossible to fit everything I want to say within a single Google review. Our house was heavily damaged by a hail storm, and Blueprint Construction was incredibly helpful right from the start. The owner came to our home the same day we reached out and he provided a detailed quote. I also received quotes from a few different companies and Blueprint saved me about $9000 in total for siding and roof replacement/repair. There was very little waiting, and the team that worked on our house was incredibly professional. They went above and beyond and you could tell that they cared about their work. The clean-up was also well-done, and I couldn't find any nails or other stray materials on my lawn or flowerbed. The end result was fantastic and the owner checked-in with us throughout the process to ensure we were satisfied with everything.

Overall, I couldn't be happier and I would highly recommend this company for anyone needing repairs to their house.
  
 
 
      Posted on Google  
   
   Christoper Collin 
 
 
 
 Trustindex verifies that the original source of the review is Google.  This company is great.
Staff knowledgeable and hard working.
Went the extra mile to clean up and look like they were never there
Highly recommended!!
  
 
 
  
 
  Load more

Flat Roofing for Calgary Buildings

A flat roof is not truly flat. It is a low-slope roof designed to carry water to a drain or edge, covered with a membrane instead of shingles. Common materials are TPO, EPDM rubber, PVC and modified bitumen, and each has strengths. Flat roofs are found on garages, additions, porches, decks over living space, and small commercial buildings. They fail when water sits on them, when seams open or when flashing at walls and drains fails, so those are the details we focus on.

TPO, EPDM and modified bitumen
Repairs and full replacement
Drains, scuppers and flashing
Garages and additions
Small commercial roofs
Ponding and leak diagnosis

Choosing a Membrane

TPO, EPDM and Modified Bitumen

TPO is a white, heat-welded single-ply membrane that reflects heat and has strong seams. EPDM is a black rubber membrane that is flexible in the cold and has been used for decades. Modified bitumen is an asphalt-based system with reinforced layers, often torch-applied or self-adhered. The right choice depends on the roof, the budget and the building, and we explain the trade-offs at the estimate.

TPO: reflective, welded seams
EPDM: flexible rubber, proven record
Modified bitumen: layered asphalt system
Choice based on your roof and budget

The Number One Problem

Drainage, Slope and Ponding Water

Water that stays on a flat roof for more than a day or two is called ponding, and it shortens a roof's life. It happens when the slope is wrong, a drain is blocked or the deck has sagged. We check the slope, the drains and scuppers and the deck, and where needed we add tapered insulation, new drains or overflow openings so water leaves the roof. A flat roof that drains well lasts much longer.

Slope and drains checked
Tapered insulation where needed
New drains and scuppers
Overflow protection added

Where Flat Roofs Leak

Seams, Flashing and Penetrations

Most flat roof leaks are not in the middle of the membrane. They are at seams that opened, flashing at walls and parapets that lifted and penetrations such as vents and pipes that were poorly sealed. We repair and replace flashing, re-seal seams and rebuild penetrations, and we trace leaks back to the real source instead of coating the area with sealant.

Seams re-welded or re-sealed
Wall and parapet flashing renewed
Pipes and vents resealed
Leaks traced to the source

Winter Loads

Snow Load, Ice and Cold-Weather Care

Calgary snow sits on flat roofs, melts in chinooks and refreezes, which loads the roof and tests every seam. Ice can block drains and push water under the membrane. We check that drains stay clear, that the roof structure can carry snow and that the insulation and ventilation keep the roof cold enough to limit melting at the edge. We also advise on safe snow removal that does not cut the membrane.

Drains kept clear of ice
Structure checked for snow load
Insulation and ventilation reviewed
Safe snow removal advice

Garages, Additions and More

Flat Roofs on Garages, Porches and Small Buildings

Flat roofs are common on detached garages, additions, covered porches and small commercial buildings. They are smaller and simpler than a house roof, but they have the same failure points. We re-roof garages and small buildings and repair larger flat roofs, with new edge metal, flashing and drainage so the roof sheds water the right way.

Garage re-roofs
Additions and porches
Small commercial roofs
New edge metal and flashing

The age and condition of the membrane decide.

Flat Roof Repair or Replacement?

Repair makes sense when:

Leaks come from one seam or flashing
The membrane is in decent shape
The roof is under about fifteen years old
The deck is dry and sound

Replacement makes sense when:

The membrane is cracked, brittle or blistered
Water has soaked the insulation or deck
Leaks keep returning
The roof is near the end of its life

Flat Roof Problem? Tell Us About It

Send the roof size, the problem you see and a photo, and we will call you back.

Questions About Flat Roofing?

Send the size, what it is for and a photo of the area, and we will call you back.

Book a Flat Roof Inspection

Frequently Asked Questions About Flat Roofing

Q. How much does a flat roof cost in Calgary?

It depends on the size, the membrane, the insulation, the drainage and what is under the old roof. We inspect and give you a clear quote instead of guessing over the phone.
Q. How long does a flat roof last?

Depending on the membrane and the care, flat roofs commonly last 15 to 30 years. Good drainage, flashing and regular inspections make the biggest difference.
Q. What is the best flat roofing material?

There is no single best. TPO is reflective and welded, EPDM is flexible and proven, and modified bitumen is layered and robust. We recommend one for your roof and explain why.
Q. What is ponding water and is it a problem?

Ponding is water that stays on the roof more than a day or two after rain or melt. It shortens the roof's life and can leak, so we find out why it is happening and fix the slope or the drain.
Q. Why does my flat roof leak?

Most flat roof leaks come from seams, flashing at walls and penetrations or a blocked drain, not from the middle of the membrane. We trace the leak to the source rather than patching the stain.
Q. Can you repair a flat roof or does it need replacing?

Often a repair works if the membrane is sound and the leak comes from one seam or flashing. If the membrane is brittle, blistered or wet underneath, replacement is better value.
Q. Can you put a new flat roof over the old one?

Sometimes, but we usually recommend removing the old roof, which lets us check and repair the deck and insulation underneath.
Q. Can I walk on my flat roof?

Light foot traffic is fine on many membranes, but heavy or repeated traffic damages them. Avoid sharp tools, and tell us if you have rooftop equipment that needs a walkway.
Q. Do flat roofs need insulation?

Yes, for comfort and to control condensation. Insulation also lets us build slope with tapered boards so water drains.
Q. Can you add a deck or garden on a flat roof?

Possibly, if the structure can carry the load and the roof is waterproofed properly. A rooftop deck needs engineering and a membrane designed for it, so ask us at the estimate.
Q. How do I clear snow from a flat roof?

Use a plastic shovel, leave a thin layer of snow and avoid chopping ice. Metal tools can cut the membrane. If the roof is high or icy, call a professional.
Q. How do I know if the flat roof deck is wet?

Soft spots, sagging, dark stains inside and a spongy feel underfoot suggest the deck or insulation is wet. We can check with a moisture inspection and replace what has soaked.
Q. Do you do flat roofs on garages?

Yes. Detached garages often have flat or low-slope roofs, and we repair and replace them as well as build new garages.
Q. Do you do commercial flat roofs?

We repair and replace flat roofs on small commercial buildings. Tell us about the building and the problem, and we will say whether it fits our work.
Q. What if my flat roof has hail damage?

Hail can bruise and puncture membranes. We inspect, photograph the damage and give you an estimate for your claim. Our hail damage page explains the process.
Q. What is the difference between a flat roof and a low-slope roof?

A flat roof has almost no slope, and a low-slope roof has a small pitch, usually under about 3 in 12. Both use membrane roofing instead of shingles, and both need good drainage and careful flashing.
Q. Can a flat roof leak without any visible damage?

Yes. Water can enter at a seam, a flashing or a penetration and travel along the deck before it shows up inside, which is why we trace the leak rather than patch where the stain appears.
Q. How often should a flat roof be inspected?

At least once a year, and after every major storm or heavy snow. A short check of the drains, seams, flashing and any ponding can catch a small problem before it becomes a leak.
Q. Which areas do you serve?

We repair and replace flat roofs in Calgary and in Airdrie, Chestermere, Cochrane and Okotoks, and in the areas between.