1. Water Pooling on the Roof Surface
Flat and low-slope commercial roofs often struggle with drainage. If water pools in areas longer than 48 hours after rain, it’s a red flag. This can lead to structural sagging, membrane deterioration, and eventual leaks.
2. Seam Failures or Membrane Separation
Whether it’s TPO, EPDM, or SBS, every membrane system has seams — and when they separate due to aging, poor installation, or weather stress, water intrusion becomes inevitable. Look for lifted edges or bubbling seams.
3. Blistering or Bubbling Under the Membrane
These are signs of trapped moisture or air. Left untreated, blisters can rupture and expose the insulation or substrate underneath, accelerating roof failure.
4. Interior Water Stains or Leaks
If you’re seeing ceiling stains, dripping water, or moldy odors inside your building, your roof may already be compromised. This is often the result of unnoticed external damage.
5. Cracked Flashings or Damaged Penetrations
HVAC units, vents, and drains are common weak points. If the flashing (metal or membrane that seals these features) is cracking or lifting, your roof’s waterproofing is compromised.
6. Sagging Roof Sections or Uneven Surfaces
This can indicate saturated insulation or structural deck damage. It’s not just a roofing issue — it can be a major safety concern.
Don’t Wait – Book a Free Roof Assessment Today
If you’ve noticed any of the signs above, don’t delay. Minor roof issues can quickly escalate, especially with Calgary’s extreme freeze-thaw cycles.