roofing Calgary

Common Flat Roofing Issues & How to Fix Them

Flat roofing in Calgary is a popular choice due to its modern aesthetic and efficient use of space. However, like any roofing in Calgary, flat roofs can experience their fair share of issues over time. From leaks to ponding water, addressing these common problems is essential to maintain the integrity and longevity of your flat roof. Find the most prevalent flat roofing issues here with insights on how to fix them effectively. 

7 Common Issues & Solutions For Flat Roofing in Calgary

Issue #1: Ponding Water

Ponding water occurs when rainwater accumulates in low areas on your flat roof instead of draining properly. These can lead to structural stress and eventually result in leaks.


  • Ensure proper roof slope during construction to encourage water drainage.
  • Regularly inspect and clear debris from drains and scuppers.
  • Install tapered insulation to improve water runoff.

Issue #2: Leaks & Water Intrusion

Leaks are a significant concern for flat roofs, especially in a climate like Calgary’s, where snow and rain are common. Water intrusion can lead to extensive damage if not addressed promptly.


  • Regularly inspect the roof for signs of damage or deterioration.
  • Seal any visible cracks or gaps using appropriate roofing sealants.
  • Consider applying a weatherproof membrane or protective coating to prevent leaks.

Issue #3: Blistering & Bubbling

Blistering and bubbling occur when moisture gets trapped within the layers of the roofing material. Over time, these blisters can weaken the roof’s integrity and lead to further issues.


  • Carefully puncture blisters to release trapped moisture and allow the area to dry.
  • Remove the damaged portion and replace it with new roofing material.
  • Improve ventilation and insulation to prevent future moisture buildup.

Issue #4: Cracking & Splitting

Temperature fluctuations in Calgary can cause roofing materials to expand and contract, leading to cracks and splits. These openings allow water to enter, increasing the risk of leaks.


  • Regularly inspect the roof for signs of cracking or splitting.
  • Seal cracks using roofing sealants or patching materials.
  • Consider applying a reflective coating to minimize temperature-related stress.

Issue #5: Membrane Damage

Flat roofs often use a membrane as a waterproofing layer. Damage to this membrane can compromise its effectiveness and lead to leaks.


  • Regularly inspect the membrane for punctures, tears, or signs of wear.
  • Repair minor damage using patching materials compatible with the membrane.
  • If damage is extensive, consider a professional repair or replacement.

Issue #6: Poor Installation or Workmanship

Improper installation or shoddy workmanship during the construction of your flat roof can lead to a host of issues down the line.


  • Choose reputable flat roofing companies with a track record of quality work.
  • If you suspect poor installation, consult professionals for an inspection and recommended solutions.
  • Invest in regular maintenance and inspections to catch and address issues early.

Issue #7: Lack of Maintenance On Flat Roofing in Calgary

Neglecting regular maintenance can exacerbate existing problems and create new ones. Debris buildup, clogged drains, and unchecked damage can all contribute to the deterioration of your flat roof.


  • Create a routine maintenance schedule and stick to it.
  • Clear debris from drains, scuppers, and gutters regularly.
  • Inspect the roof for signs of damage and address issues promptly.

Maintaining Flat Roofing in Calgary

As a homeowner with flat roofing, addressing common issues is essential for maintaining a durable and reliable roofing system. By staying vigilant, performing regular maintenance, and addressing problems as they arise, you can enjoy the benefits of a functional and resilient flat roof that withstands the challenges of Calgary’s climate for years to come.

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected].

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