Describe the visible condition
A fine network of cracks in a surface finish, an isolated chipped edge and the loss of flakes from a tile body are different observations. Record location, extent and whether the condition appears on many tiles or only a few. Avoid diagnosing a whole roof from a close photograph of one fragment. Surface appearance alone may not establish whether a tile still performs its intended function.
Look for patterns and causes
A professional survey should compare roof exposures, past repair areas and places subject to persistent wetting or physical disturbance. Mechanical breakage, incompatible replacements and material deterioration require different responses. Where the cause remains uncertain, retain representative fragments and associated location records for assessment rather than discarding all evidence during cleanup.
Define a repair threshold
Ask the assessor to distinguish tiles suitable to retain, tiles needing closer examination and tiles requiring replacement. Agree on that selection process before work begins. The proposal should explain how concealed problems discovered during access will be recorded and approved. This makes it possible to preserve sound historic material while addressing actual failures, instead of replacing everything that has aged visibly.
Further reading & technical sources
Consult the current product documentation and local requirements for your project. These introductions are not installation specifications.
More tile roofing guides
- White deposits on clay tile roofs
- Reading historic clay tile maker’s marks
- Documenting a historic clay roof before work
Tile Roofing USA editorial guide · Published October 28, 2026.