Step-by-step guide

How to Prep a New Mexico Roof for Monsoon Season

New Mexico monsoons drop 1–3 inches of rain in an hour on roofs that spent 9 months baking in UV. The failure points are predictable. Here's what I check on every pre-monsoon walk-through.

You'll need

  • Roofing sealant (polyurethane, not silicone)
  • Gutter scoop
  • Garden hose

Tools

  • Ladder
  • Cordless drill
  • Caulk gun
The steps

What to do, in order

  1. 1

    Clear gutters and downspouts

    Monsoon runoff overwhelms partial gutters in 90 seconds. Flush with a hose end-to-end.

  2. 2

    Check flashing sealant at penetrations

    Pipe boots, vents, skylights. UV cracks polyurethane in 5–7 years in NM. Re-seal any cracks over hairline width.

  3. 3

    Inspect ridge cap for lifted shingles

    Windstorms preceding monsoons lift ridge caps. Re-nail and re-seal any raised edges.

  4. 4

    Test the scupper drains on flat roofs

    Foam and TPO flat roofs pond within 24 hours of a plugged scupper. Poke debris clear from each drain.

  5. 5

    Look up at ceilings for stain shadows

    Faint yellow rings show slow leaks. Note location; the roof entry point is often 3–6 ft uphill.

  6. 6

    Check the chimney cricket and cap

    NM chimneys crack from freeze-thaw. Re-caulk the cap and inspect the cricket flashing for pinholes.

  7. 7

    Trim tree branches back 6 ft

    Wet limbs scour granules and clog valleys in 20 mph gusts.

  8. 8

    Photograph the roof (baseline)

    Wide + close-ups of every slope. If monsoon damage hits, adjusters accept before/after evidence.

  9. 9

    Book any repairs before June 30

    NM roofing calendars fill by early July. Waiting until August means tarps and interior damage.

FAQ

Homeowners also ask

When does NM monsoon season start?

Officially June 15, but real storm activity ramps up the second week of July across ABQ, Santa Fe, and Rio Rancho.

Should I recoat my flat roof before monsoon?

Only if the existing membrane is intact. Coatings over failed seams trap water and accelerate failure. Get an inspection first.

Do I need to walk the roof myself?

No. Most of these checks work with binoculars from the ground plus a ladder for eave-level review. Never walk a wet or steep NM roof without fall protection.

Next step

Rather have me look at it in person?

Free NM walk-around, no sales pitch. If you want it in writing, reports start at $149.

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