Look at distribution
One broken slate is local. Loose coverings across several areas, failed battens and brittle underlay are not.
Repair history provides context
Many hooks, patches and replaced sections can show that maintenance is becoming frequent.
Ask for both options to be described
If repair and renewal are both suggested, compare what each includes rather than two headline prices.
Want a roofer to inspect it?
Describe the symptom and the weather conditions in which it appears. A few photographs from safe ground can help.
Request roofing quotesQuote requests are provided by MyJobQuote, an independent third-party service.