BELOW THE SURFACE
Tile roof leaks and the underlayment beneath them
The tile you can see is one part of the roof. A leak investigation should also consider the layers, penetrations, and transitions you cannot see from the driveway.
Why the visible crack may not tell the whole story
A damaged tile can expose the underlayment below it. But the location of a ceiling stain is not a complete map of the entry point. Ask the roofer to document a plausible path and inspect the surrounding details rather than assuming that the closest visible tile is the entire problem.
What is underlayment?
Underlayment is a weather-protective layer beneath the tile covering. The correct material and installation are part of the roof system. Ask for its product name and condition in an inspection report, especially when a repair requires tiles to be lifted.
Check flashing and penetrations
Vents, walls, valleys, and other transitions deserve attention during an investigation. Ask which areas were inspected and which could not be assessed. A useful report distinguishes observed defects from suspected causes and explains whether further investigation is needed.
Does new underlayment always mean new tiles?
Not necessarily. Ask whether existing tiles are suitable for reuse and whether a lift-and-relay scope is practical for the actual roof. Clarify anticipated breakage, available replacement stock, attachment requirements, and the warranty for reused materials. Reuse is a project-specific decision.
When water is entering now
Keep people away from sagging ceilings and water near electrical equipment. From a safe location, document what you observe and contact a qualified professional. Do not climb onto wet tiles or attempt a roof inspection during a storm.
Prepare for the inspection
Write down the first observed date, whether the leak follows particular weather, the rooms affected, and any previous repairs. Share existing photos and roof paperwork. Describe the observation accurately; let the inspection establish the cause.
Further reading
Eagle Roofing homeowner FAQs ↗
TRI Alliance roof maintenance guide ↗
General homeowner education. Site-specific work must follow applicable requirements and the selected product’s installation instructions.