Small, isolated leaks or damage (e.g., a few missing shingles) can often be repaired. However, if damage exceeds 30% of the roof or it is near the end of its lifespan (20-30 years for asphalt), a full replacement is usually recommended.

Most residential roof replacements take about one to two days, though weather and roof complexity (size, pitch) can extend this.

Look for missing, cracked, or curling shingles, granule loss, water stains on ceilings, and damaged flashing around chimneys and vents.

Costs are determined "per square" (100 square feet) and depend on materials (e.g., asphalt vs. metal), with metal roofs often costing three times more than shingle.

No, you do not need to be home, though you should ensure the crew has access to electricity and that pets/children are safe.

Ensure they are licensed and insured, have local references, and provide a detailed written estimate. A 2025 roof buying guide suggests watching for red flags like a significantly lower price compared to others, which may indicate poor-quality materials.