What to consider
Inspect tiles together with flashings, membranes, timber and fixings. Discolouration alone does not establish technical failure. Base repair and replacement decisions on the actual roof and distinguish an expected service life from a written warranty.
Apply this to your roof
Record your preferences in the roof plan. Final dimensions, product suitability and the complete build-up are assessed for the actual roof; keep the agreed details and manufacturer instructions with your project documents.