At a glance

A flat roof repair addresses an identified defect in a membrane, connection or another part of the roofing system. It makes sense when surrounding materials and the deck allow a compatible repair; covering a symptom alone can leave the underlying cause unresolved.

Identify what needs attention

A ceiling stain does not always sit directly below the water’s entry point. Water may travel from flashing, an upstand, a penetration or another building component. Photos, repair history and the conditions when the problem occurs help guide the assessment. A reliable conclusion may require more observations, particularly if the defect is not visible during the visit.

Work with the existing materials

TPO, modified bitumen and asphalt-and-gravel roofs do not use the same repair methods. The material must be identified before selecting products. Incompatible past patches or a severely deteriorated surface can limit the available options. We distinguish areas that may be repaired locally from those that require a broader assessment.

Consider the condition of the whole roof

A focused repair can be reasonable on an otherwise sound system. If defects are widespread, concealed materials are wet or repairs keep recurring, compare that option with replacement. The aim is to explain the work’s scope, its limitations and the signs to monitor afterward, so your next decision is based on more than the immediate symptom.

Prepare for our conversation

  • When the problem occurs: rain, thaw or other conditions
  • Affected room and stain location
  • Roof covering, if known, and earlier repairs
  • Photos taken without entering an unsafe area

Your questions, answered.

Does a leak mean I need a completely new roof?

No. The cause and the condition of surrounding materials need to be assessed. Some situations suit a targeted repair, while others call for more extensive work.

Can I use a store-bought roof patching product?

Identify the membrane before applying anything. An incompatible product can make a permanent repair more difficult. Photograph the problem and seek advice before covering it.

Can a repair be confirmed from photographs alone?

Photos help with the first discussion but may not show seam condition, concealed layers or decking. A site visit may be needed to define the work.