How to find and fix a roof leak
Trace the water path, inspect the highest likely entry point, and repair the cause—not only the stain.
Read the guide →Roof inspections, leak tracing, tile and metal repairs, gutters, flashing, insulation, and replacement planning.
Trace the water path, inspect the highest likely entry point, and repair the cause—not only the stain.
Read the guide →Use timing, location and weather clues to separate a roof leak from gutter overflow, plumbing trouble or roof-space condensation.
Read the guide →Work out whether the restriction is in the gutter, outlet, downpipe or underground stormwater route before cleaning, altering or replacing anything.
Read the guide →Roof faults are easiest to solve when you follow water uphill and inspect every change in plane or material. Safety and correct access come before diagnosis.
Map stains, damp insulation and drip paths during or soon after rain, then inspect above and uphill outside.
Flashing, valleys, ridges, penetrations, fasteners, laps and gutters cause more leaks than intact field material.
Replace damaged components and reinstate the intended overlap or flashing detail before using compatible sealant.
Roof design and maintenance must reflect local wind, rainfall intensity, hail, salt, heat, frost, snow and bushfire or wildfire exposure. Product laps, fixings, underlays and flashings may differ by region, pitch and building height, so use current local requirements and manufacturer documentation.
Follow each roof plane to valleys, gutters, sumps, outlets and legal discharge points. Overflow routes should avoid doors, walls and concealed cavities.
Record chimneys, vents, skylights, solar mounts, antennas and services with their flashing system, condition and access needs.
Future cleaning, coating, fastener replacement and inspection need safe access. A detail that cannot be maintained is likely to be neglected.
Wind-driven rain can travel sideways or uphill beneath laps and flashings, exposing defects that calm vertical rain does not reach.
Avoid steep, wet, brittle, high or unfamiliar roofs and any roof near overhead services. Use a qualified contractor with safe access.
Inspect at least annually and after severe weather, adjusting frequency for roof age, trees, coast, corrosion, previous leaks and the manufacturer’s maintenance schedule.
Yes. Keep drainage clear, inspect penetrations and coatings, remove incompatible debris and follow warranty requirements from the beginning.
How-tos, buying advice, troubleshooting, costs, maintenance and design guidance.
How-tos, buying advice, troubleshooting, costs, maintenance and design guidance.
How-tos, buying advice, troubleshooting, costs, maintenance and design guidance.
How-tos, buying advice, troubleshooting, costs, maintenance and design guidance.
How-tos, buying advice, troubleshooting, costs, maintenance and design guidance.