install roll roofing over shingles

Installing Roll Roofing Over Shingles A Comprehensive Guide

When it comes to roofing solutions, homeowners are often faced with various choices. One option that has gained popularity is roll roofing, especially for those looking to overlay existing shingles. This article will guide you through the essential steps, advantages, and considerations when installing roll roofing over shingles.

What is Roll Roofing?

Roll roofing is a type of roofing material that comes in large rolls, made from asphalt, which makes it lightweight, easy to handle, and straightforward to install. It’s typically used for low-slope roofs and can provide a quick solution for roof repairs or replacements. Roll roofing is less durable than traditional shingles but offers a cost-effective and efficient means of roofing, especially in situations where speed is essential.

Advantages of Installing Roll Roofing Over Shingles

1. Cost-Effectiveness One of the primary reasons homeowners opt for roll roofing is its affordability. It can be significantly cheaper than installing new shingles, allowing you to save money while extending the life of your roof.

2. Time-Saving Roll roofing installation is a quick process. Since you’re installing over existing shingles, there’s no need for tear-off, which simplifies the process and reduces labor costs.

3. Added Protection Applying roll roofing over shingles provides additional protection against leaks and weather damage. It can help create a waterproof barrier that extends the life of your structure.

4. Flexibility Roll roofing is suitable for various roofing types and can be used on sheds, garages, and other structures in addition to traditional homes.

Considerations Before Installing Roll Roofing

1. Condition of Existing Shingles Ensure that your existing shingles are in good condition. If there are significant issues such as rot, major leaks, or large amounts of missing shingles, it may be wise to replace them before adding roll roofing.

2. Weight Limit Ensure that your roof structure can support the additional weight of the roll roofing. Consult a roofing professional if unsure.

3. Local Building Codes Check local building regulations regarding layering roofing materials. Some areas have specific codes that dictate roofing practices, so it’s essential to be informed.

Installation Steps for Roll Roofing Over Shingles

1. Gather Tools and Materials You’ll need roll roofing, roofing cement, a utility knife, hammer, nails, and a pry bar. Ensure you have safety gear, including gloves and goggles.

2. Prepare the Surface Clean the existing shingles to remove debris, dirt, or any loose shingles. This preparation ensures better adhesion of the roll roofing material.

3. Measure and Cut the Roll Roofing Measure the sections of the roof that require roofing and cut the roll roofing to size. Leave a few extra inches on each side for better coverage.

4. Begin Installation Starting from the bottom edge, roll out the roofing material, allowing it to overlap the shingles by a few inches. Nail it down securely, using roofing nails spaced every 12 inches along the edges. Ensure you apply roofing cement under laps for additional sealing.

5. Seal the Seams Use roofing cement to thoroughly seal all seams and overlaps. This step is crucial to prevent water from seeping through.

6. Finish the Edges Trim any excess roofing material and ensure all edges are sealed. Pay close attention to roof valleys and edges, as these areas are prone to leaks.

7. Final Inspection After installation, inspect the roof for any loose areas or potential gaps. Make necessary adjustments to ensure everything is firmly in place.

Conclusion

Installing roll roofing over shingles is a practical option for homeowners seeking a quick and cost-effective roofing solution. By following the steps outlined and considering the condition of your existing roof, you can extend the lifespan of your roofing system and enjoy the benefits that roll roofing offers. Always prioritize safety and consider consulting roofing professionals if needed, ensuring your home remains a safe and comfortable space.