Visible Nail Heads on Roof - Why It’s a Concern
When nail heads are visible on a roof, it’s usually an indication that the roofing installation may not have been performed correctly. In a properly installed roof, nail heads should be covered by the overlapping shingle or tile directly above. This creates a watertight seal that helps protect the roof from weather-related damage.
Exposed nail heads are problematic for several reasons:
Water Intrusion Points: One of the primary functions of a roof is to keep water out of the home. When nail heads are left exposed, they create potential entry points for water. Over time, moisture can seep in around the nails, especially during heavy rain or snow. This can lead to leaks, water damage, and even mold growth inside the home if left unaddressed.
Corrosion and Rusting: Nails that are exposed to the elements are more likely to corrode or rust over time. Rust weakens the nail and reduces its ability to hold shingles in place securely. This could eventually result in shingles becoming loose or falling off, further compromising the roof’s integrity.
Shingle Damage: As nails work loose over time due to expansion and contraction caused by temperature changes, they can push up against shingles or tiles, causing them to crack or break. This accelerates roof wear and tear, potentially leading to costly repairs or premature roof replacement.
Solution:
To prevent these issues, exposed nail heads should be properly sealed with roofing cement or caulking. In some cases, it may be necessary to replace improperly installed shingles or tiles. For a long-term solution, professional roof repair is recommended to ensure that nails are securely fastened and appropriately covered, ensuring the roof’s overall durability and weather resistance.