The source, not the stain

Roof Leak Detection in Queens

Roof leak detection by MNM Roofing follows the water back to where it enters your roof: flashing, a pipe penetration, an open seam or a blocked drain. We do not stop at the stain. We can usually be there the same day.

Call (347) 835-5040 Get a free estimate
MNM Roofing roofer on a Queens roof checking the flashing around a chimney for the source of a leak
Process

Four checks, one leak

We ask where the stain is and when it drips during your call. On site, we work in this order:

  1. Attic

    We follow the water trail up from the ceiling stain and check insulation and decking for moisture.

  2. Roof walk

    Flashing, the chimney, skylights, vent pipes, roof-to-wall joints and seams all get a close look.

  3. Moisture scan

    With a meter and an infrared camera, which pick up wet areas the eye misses.

  4. Water test

    We run water over one suspect area at a time until the drip shows inside.

Symptoms

Match the stain to the roof

What you see inside, the likely roof source, and how MNM Roofing confirms it
What you see Likely source How we confirm
Stain near the chimney Chimney flashing Water test
Drip at a skylight Skylight flashing or curb Visual, then water test
Wet spot over a bathroom or kitchen Vent pipe boot Attic check
Flat roof leak after heavy rain Ponding water or open seam Moisture meter
Stain along an outside wall Clogged gutter or roof-to-wall joint Visual

When flashing turns out to be the cause, here is how a flashing leak gets repaired. Leaks that show only after a storm point to storm damage.

Hidden leaks

The leak you cannot see yet

Water can soak attic insulation and roof decking for weeks before any ceiling stain appears. Wet insulation stops working. Damp wood grows mold.

Every season the source stays unfound, the bill grows. Leave it, and a flashing repair turns into new decking, insulation and drywall.

We check:

  • Single-family homes
  • Townhouses
  • Multi-family and apartment buildings
  • Flat roofs on retail, office and warehouse buildings
Water-stained attic insulation and dark, damp roof decking from a slow roof leak that has not reached the ceiling yet
Wet decking, dry ceiling
Weeks

before a ceiling stain shows

Deliverables

What you have in hand when we leave

Every visit ends with these four:

Written findings

With photos of the exact spot the water gets in.

Moisture readings

From the attic and the roof surface.

Repair estimate

Covering flashing, patching, seam or drainage work.

Active leak

Same-visit patch or emergency tarping

When the leak is active. Water pouring in right now calls for an emergency repair visit first.

FAQ

Before you book the visit

Yes. We run a controlled water test on one area at a time until the drip shows inside.

Yes, including stores, offices and warehouses. Open seams on leaking flat bitumen roofs come up often.

Often, yes. Small flashing, boot and seam repairs are done on the visit.

The estimate that comes with roof leak detection is free. You see the repair price in writing before any work starts.

Free estimate

Tell us where the stain is, and we will find where the water gets in.

Call (347) 835-5040 Book your free estimate