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Before the first monsoon: the commercial roof checklist

What to do on your roof in May and June so July is uneventful. Short, specific, and the reason our program clients do not call us in a panic.

Mike Torres, Owner · February 25, 2025 · 3 min read

Monsoon season starts in mid-June and the first big storm finds every weakness on the roof at once. This is what to do before it.

  • Clear every drain, scupper and overflow. Debris in a drain is the number one cause of monsoon roof failures: water ponds, finds a seam, and comes inside. Fifteen minutes per drain.
  • Walk the seams and flashings. Probe the seams, look at every penetration, every curb, every wall flashing. Sealant that has split gets replaced now.
  • Check the rooftop units. HVAC contractors leave holes. Any new penetration since the last inspection needs proper flashing.
  • Remove what does not belong. Ladders, old equipment, buckets of sealant, debris from other trades. Wind moves it and it punctures the membrane.
  • Photograph everything. A roof condition record before the storm is the beginning of a claim after it.
  • Know who you will call. A roofing contractor with your building on file and a 24-hour line that reaches a person. Program clients get dispatched first.

Our spring maintenance visit is this list, with a report. If your contractor's is not, this is the list to give them.

Next step

Tell us about the roof.

A Ridgeline estimator replies the same business day. Program clients reach a foreman on the 24-hour line, any time.

Demonstration site. Ridgeline Roofing is a fictional company. Designed and built by Ironsite Digital to show what a commercial roofing contractor's website should be. Want one like it?