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Commercial roofing

Roofing for the buildings that keep business running.

Commercial buildings often have low-slope roofs with a continuous membrane, parapet walls, drains and rooftop equipment. Each of those is a place where water can get in.

Low-slope commercial roof with light membrane and rooftop units

Where problems start

Weak points on a low-slope roof

  • Seams in the membrane that open up over time
  • Ponding water that sits for days after rain instead of draining
  • Clogged drains, scuppers and downspouts
  • Flashing at parapet walls, curbs and roof edges
  • Penetrations for HVAC units, vents, conduit and pipes

Valley conditions

Sun is the long-term load

On a flat roof, sun exposure is constant. Over the years, heat and UV can make membranes and sealants brittle, especially around equipment where service visits add foot traffic. Keeping drains clear and catching small seam issues early helps a roof go the distance.

Working together

What helps us help you

When you call about a commercial roof, it helps to know the approximate size and roof type, where leaks show up inside, whether the building is occupied during the day, and who should be the point of contact for access.

Talk about your building's roof

Call (209) 538-2274 or email lofortiroofing@aol.com and tell us about your roof. We'll talk through what you're seeing and what makes sense next.