The 5 Most Common Causes for Flat Roof Leaks

Flat roofs are most commonly found during Commercial Building Inspections. These are the places we look during a flat roof building inspection.

Aged and blistering EPDM flat roof membrane near Roseville MN

Aged and blistering EPDM flat roof membrane near Roseville MN

  1. Poor drainage areas- if there is nowhere for rain to drain, or snow to melt,  your roof acts like a pool. Breakage and damage will occur much faster in roofs with a poor drainage plan. Not to mention the stress of the extra weight on ceiling, and attic structural components.
  2. Age of the roof-typical life span of tar and gravel, or rubber roof membranes are 50+ years. The picture shows a blistering flat roof membrane- you can also see the low drainage areas.
  3. Tears in roof membranes, or cracked tar in built up gravel roofs
  4. Junctions/seams opening up that are not repaired. Roof Maintenance is key to a long lasting flat roof.
  5. Roof penetrations and flashing should be monitored and repaired. Seasonally on older roofs, maybe every few years on flat roofs under 20 years old.