A loose roof edge can let water run behind the gutter or beneath the membrane. Follow the edge detail from the roof surface to the metal and then into the drainage system before choosing a repair.

What to check first

  • Check whether the membrane has lifted from the edge metal.
  • Inspect metal overlaps and fasteners without prying sound material apart.
  • Look for water marks behind the gutter, not just inside it.

Follow the connection from top to bottom

  1. Find the upper entry point

    Inspect where flashing ends against a wall, curb, pipe, or other surface. Water entering behind that termination may bypass a patch lower down.

  2. Correct the underlying defect

    Loose metal, rotten wood, failed fasteners, and deteriorated membrane need a suitable repair before waterproofing. A surface bridge needs stable, compatible material on both sides.

  3. Keep the detail functional

    A repair should shed water without blocking outlets, weep paths, or intended movement. Use the specified reinforcement and dimensions for the product and detail.

From the project archive

Roof detail from the original Flat Roof Doctor project
Historical project photo · Flat Roof Doctor

Product reference: Bergstrom Industries’ published knowledge catalog. Follow the latest product label and safety information. Historical project examples are educational and are not a specification for every roof.