What Are Improperly Driven Nails?
Improperly driven nails can significantly affect the performance and longevity of asphalt shingles. These nails fall into three categories:
- Over-driven Nails: Nails driven too deeply, beneath the surface granules of the shingle.
- Under-driven Nails: Nails left above the surface of the shingle.
- Angled Nails: Nails driven in at an angle, cutting into the shingle.
Issues Caused by Improperly Driven Nails
Over-driven Nails
- Effect: Over-driven nails can drive right through the shingle or barely hold it to the roof deck, leading to potential sliding off the roof.
- Cause: Often caused by nail guns set to the wrong pressure.
Under-driven Nails
- Effect: These nails lead to nail “pop” when the deck expands and contracts, lifting the shingle away from the self-sealant. This predisposes the shingles to blow off in wind events and can create holes in the shingles above if the nail pops through.
- Result: Lifted shingles are more vulnerable to wind damage.
Angled Nails
- Effect: Angled or crooked nails are not flush to the surface and can cut through shingles. They are subject to deck movement and provide inadequate anchorage.
- Impact: Reduced roof integrity and increased risk of damage.
Remedies for Improperly Driven Nails
At the Time of Installation:
- Remove the Nail: Carefully remove the improperly driven nail.
- Install a New Nail: Properly install a new nail in the correct position.
- Repair the Hole: Use plastic roof cement to seal the hole.
After Installation:
- Lift the Shingle: Carefully lift the overlaying shingle to access the improperly driven nail.
- Remove the Nail: Remove the nail and install a new one in the correct location.
- Apply Roof Cement: Apply roof cement over the hole to ensure proper sealing of the shingle above.
Check Shingle Application Instructions
- Hand Sealing Procedures: Refer to GAF shingle application instructions to determine the number and location of dabs of cement required for hand sealing.
- Follow Instructions: Ensure to follow the specific instructions for the product being sealed to maintain roof integrity and warranty coverage.
Conclusion
Proper nail installation is crucial for the performance and longevity of asphalt shingles. By avoiding common mistakes with over-driven, under-driven, and angled nails, and following proper installation and repair procedures, homeowners can ensure their roofs remain secure and effective.
For Immediate Service or Consultation
Contact Allied Emergency Services, INC.
Phone: 1-800-792-0212
Email: Info@AlliedEmergencyServices.com
Location: Serving Illinois, Wisconsin, and Indiana with a focus on the greater Chicago area.
If you require immediate assistance or have specific questions, our human support is readily available to help you.
Disclaimer: This article is intended for informational purposes only. For professional advice, consult experts in the field.
