What To Check After Roofers Installed New Roof? After roofers have installed a new roof, it's important to conduct a thorough inspection to ensure everything is done correctly. Start by checking the quality of the shingles or tiles to make sure they are properly aligned and securely fastened. Inspect the flashing around chimneys, vents, and skylights to confirm there are no gaps or loose seams. Look for any signs of debris left behind, like nails or roofing materials. Check the gutters for any clogs or blockages. Verify the roof's drainage system to ensure water will flow properly. Finally, ask for a final inspection report and warranty details. If anything seems off, contact your roofing company promptly for adjustments.