If you want to go further, have a look at Article 2 (Warning Signs) and Article 13 (Storm Damage) for photo examples and what to watch for from the ground. If you already know there is an issue, start with roofing for overall guidance, or book in a repair through roof repair. We are NFRC members, fully insured, and we give a written workmanship guarantee. The sensible time to fix a roof is before the next week of wind and rain.