My Flat Roof is Leaking — What Should I Do?

Discovering your flat roof is leaking can be alarming. Acting quickly and calmly will minimise damage and help ensure the repair is done correctly. Here's exactly what to do.

Step 1: Contain the Water

Place buckets or towels to catch drips. If water is pooling on a ceiling, carefully pierce the plaster at the lowest point to drain it in a controlled way rather than letting it spread and cause a larger collapse. Move valuables and furniture away from the area.

Step 2: Document Everything

Take photos of the water ingress, any staining, and if safe to do so, the roof surface from a window or door. This is important for insurance purposes and helps the roofer diagnose the problem.

Step 3: Contact a Roofer

Call a specialist flat roofing contractor rather than a general builder. Describe the location and extent of the leak. Many reputable companies offer emergency callout services for active leaks.

Step 4: Temporary Protection

A roofer may apply temporary waterproofing (such as a bitumen-based liquid or tape) to stop the leak while a full repair is planned. This is normal — don't be concerned if the contractor can't do a permanent fix the same day.

Step 5: Get the Problem Diagnosed Properly

Water doesn't always enter at the point it appears inside. A good roofer will carry out a proper survey before quoting for repairs. Be wary of anyone who quotes for a full replacement without properly diagnosing the cause.