How to Cover Exposed Roofing Nails on a Shingle Roof
Exposed roofing nails can lead to leaks, wind uplift, and accelerated roof wear if left untreated. Understanding the best materials and methods to cover these nails helps protect a roof’s performance, extend its life, and maintain home value. This guide covers practical, safe, and durable approaches for homeowners dealing with exposed roofing nails on asphalt shingle roofs.
Understanding Exposed Nails And Why They Need Coverage
Exposed roofing nails occur when nails lose their caps, seals, or when flashing shifts, leaving the nail heads visible. The primary risks include water intrusion at the nail sleeve, rust, and nailhead loosening due to wind. Nails on older roofs may be more susceptible as shingles become brittle or lift. Addressing exposed nails promptly reduces interior water damage, stops potential mold growth, and preserves roof integrity over time.
Safe Materials And Methods To Cover Exposed Nails
Effective coverage rests on choosing compatible materials and reliable sealing techniques. Below are proven options with typical applications for asphalt shingles.
Roofing Sealant And Asphalt Roof Cement
Roofing sealants and asphalt roof cement provide a flexible, weather-resistant seal around the nail head. Clean the area, remove any loose shingle fragments, and apply a bead around the nail head. Press the shingles firmly to ensure a good seal, then smooth the cement for a flush finish. This method is quick and suitable for minor nail exposure on low-slope sections.
Nail Heads With Roofing Washers Or Plastic Cap Nails
Using a metal washer or plastic cap over the nail head can distribute pressure and reduce water ingress. Install washers that fit the nail size and secure with appropriate roofing nails. This approach often works well for minor nail exposure or re-sealing small areas after shingle lifting.
Aluminum Or Copper Foil Tape And Flashing Primer
For a semi-permanent repair, apply a self-adhesive flashing tape around the nail head, then cover with a thin layer of roofing cement or sealant. This method adds a protective barrier against moisture and is effective on flat or low-slope sections where sealants alone may not stay in place.
Copper Or Zinc Roof Patches
In cases of multiple exposed nails near a damaged area, consider a patch with compatible metal to minimize galvanic corrosion. Install the patch over a prepared surface with roofing cement and fasten per manufacturer instructions. This approach provides a durable, long-term fix for localized damage.
Flashing And Shingle Refit
When exposure is tied to lifted shingles or flashing misalignment, reinstalling the affected shingles and replacing damaged flashing offers a more comprehensive solution. Carefully lift shingles, reseat them, re-nail with proper spacing, and seal the joints with roof cement. This technique addresses the root cause rather than just the symptom.
Step-By-Step Repair Process
Follow a methodical workflow to maximize effectiveness and safety. The steps assume access to a standard ladder, safety gear, and common roofing supplies.
- Assess The Area: Inspect surrounding shingles for damage, swelling, or rot. Identify all exposed nails and prioritize the most vulnerable spots.
- Prepare The Surface: Clean dirt, debris, and old sealant from around the nail head. Dry the surface completely to ensure proper adhesion.
- Choose The Repair Method: Select the appropriate material based on the extent of exposure, roof pitch, and weather conditions.
- Apply Sealant Or Patch: Use a steady bead of sealant around the nail head or position the patch/washer as recommended by the product instructions. Smooth edges to blend with surrounding shingles.
- Reinforce With Fastening: If re-nailing is needed, space nails correctly (typically 6-8 inches apart on the same ridge) and ensure shingles are flush against the roof deck.
- Seal And Cure: Allow sealant or cement to cure according to manufacturer guidelines. Avoid stepping on treated areas until fully cured.
- Inspect After Rain: Check for any new leaks after a rainfall. Reinforce seals if moisture appears.
Do’s And Don’ts For Covering Exposed Roofing Nails
Practical guidelines help prevent common mistakes and extend repair life.
- Do work in dry weather and on a dry roof to ensure proper adhesion and safety.
- Do choose products compatible with asphalt shingles and existing sealants.
- Do test a small area first to confirm color and adhesion before full application.
- Don’t use rubber-based caulk alone on high-wind sections, as it may fail under movement.
- Don’t over-tighten nails, which can crack shingles or damage the nail bed.
- Don’t ignore flashing failures near chimneys, vents, or valleys, as these areas are high-risk for leaks.
Maintenance Tips To Prolong Roofing Nail Coverage
Ongoing care reduces future exposure and expands the life of the roof. Inspect the roof at least twice a year and after severe storms. Keep gutters clear to prevent water from backing up and loosening seals. Schedule professional inspections if shingles show widespread curling, blistering, or granule loss. Consider upgrading to corrosion-resistant nails or color-matched sealants to improve aesthetics and durability over time.
When To Call A Professional
If the roof shows extensive damage, multiple exposed nails across a large area, or if access is difficult from the ground, consulting a licensed roofer is advisable. A pro can assess underlying issues, replace compromised shingles, reinstall flashing, and ensure proper ventilation and attic moisture control to prevent future nail exposure.