Large bumps or raised areas on your roof can be a cause for concern, and often, improper nailing of roof decking is to blame. In this article, we’ll provide precise information about why these bumps occur and how to address this issue effectively.
Understanding the Problem
1. Roof Decking: Roof decking is the layer of boards or sheets attached to the roof’s structural components. It provides a flat and stable surface for the roofing material to be installed.
2. Nailing of Roof Decking: Roof decking is typically fastened using nails or screws. When this is done improperly, it can lead to raised areas or bumps on the roof’s surface.
Causes of Large Bumps:
1. Overdriven Nails: If nails are driven too deeply into the decking, it can cause the decking material to buckle or warp, resulting in a raised bump on the roof.
2. Inconsistent Nailing: In some cases, uneven nailing or using nails of varying lengths can lead to an irregular roof surface with noticeable bumps.
3. Warped Decking Material: In rare cases, the decking material itself may be warped or uneven, causing bumps when nailed down.
Addressing the Issue
To resolve large bumps from improperly nailed roof decking:
1. Inspection: Carefully examine the roof’s surface to identify the areas with raised bumps.
2. Remove Roofing Material: If possible, remove the roofing material (shingles, tiles, etc.) over the affected area to access the decking.
3. Re-Nail Properly: Where overdriven nails are the cause, carefully remove them and re-nail the decking material with the appropriate nails, ensuring they are flush with the surface.
4. Replace Warped Decking: If the decking material itself is warped, it may need to be replaced to achieve a flat and even surface.
5. Install Underlayment: To further protect against future bumps, consider installing an underlayment over the decking material before reapplying the roofing material.
Preventive Measures
To prevent large bumps from improper nailing of roof decking in the future:
1. Professional Installation: Ensure your roof is installed by experienced professionals who are well-versed in proper nailing techniques.
2. Quality Materials: Use high-quality decking materials that are less likely to warp or deform.
3. Inspection and Maintenance: Regularly inspect your roof for signs of bumps or irregularities and address issues promptly.
Conclusion
Large bumps on your roof can be unsightly and may indicate a problem with the nailing of the roof decking. Whether the issue is due to overdriven nails, inconsistent nailing, or warped decking material, addressing it promptly is essential to maintain the roof’s integrity and aesthetics. By following the solutions outlined in this article and taking preventive measures, you can ensure a smooth and bump-free roof.