What To Check After Roofers Installed New Roof? After your new roof installation, it's important to perform a careful inspection. Look for loose shingles or gaps in the flashing, which could lead to leaks. Check the gutters to ensure they’re secure and clear of debris. Verify that roof edges and valleys are properly sealed. Inspect the attic for signs of leaks or poor ventilation. Ensure the ventilation system is functioning correctly to prevent moisture buildup. Confirm all materials used match your agreement. This check will help ensure your roof is properly installed and will last for years.