Installing Roll Roofing Over Existing Shingles for Efficient Home Roofing Solutions

Roll Roofing Over Existing Shingles A Practical Guide

When it comes to home roofing, homeowners often face the dilemma of whether to replace their old shingles or to install a new roofing layer over the existing ones. One viable solution that can save time and cost is roll roofing over existing shingles. In this article, we will explore the advantages, challenges, and steps involved in this roofing method.

Advantages of Roll Roofing

1. Cost-Effectiveness One of the primary benefits of installing roll roofing over existing shingles is the potential for significant savings. Removing old shingles involves labor, disposal costs, and potential repairs to the underlying structure. By laying roll roofing over the existing layer, homeowners can reduce expenses significantly.

2. Time Savings Roof replacement can be a time-consuming process, often disrupting daily life. Installing roll roofing is quicker, as it eliminates the need for shingle removal and prepares the roof surface for the new layer. Homeowners can typically expect the job to be completed in a shorter time frame, minimizing inconvenience.

3. Reduced Waste By choosing to install roll roofing over existing shingles, homeowners contribute to environmental sustainability. Instead of sending old shingles to a landfill, they can extend the lifespan of their roofing system without adding to waste.

4. Improved Aesthetic Appeal Modern roll roofing products come in various styles and colors. This versatility allows homeowners to enhance their home’s appearance while providing a functional new layer of protection.

Challenges to Consider

1. Building Codes Before beginning any roofing project, it is essential to check local building codes and regulations. Some jurisdictions have restrictions on the number of layers of roofing allowed on a structure. Ensure compliance to avoid potential legal issues down the line.

2. Weight Considerations Adding another layer to your roof increases the overall weight. Older structures may not be equipped to handle the extra load, leading to potential structural issues. An inspection by a qualified professional can help determine if your roof can support the additional weight.

3. Proper Installation The longevity of roll roofing depends heavily on proper installation. Homeowners who opt for a DIY approach need to ensure they follow manufacturer guidelines meticulously. Missteps in the installation process can lead to leaks and other problems.

4. Warranty Limitations Some manufacturers may void warranties if their products are not installed according to specifications, especially when applied over existing layers. It’s crucial to read the fine print and understand the implications of your roofing decisions.

Steps for Installing Roll Roofing Over Existing Shingles

1. Inspection Begin with a thorough inspection of the existing shingles. Look for signs of damage, such as curling, missing shingles, or serious wear. If the roof is severely compromised, consider repairing or replacing it before proceeding.

2. Preparation Clear the surface of debris, dirt, and other materials that can interfere with the installation. Additionally, ensure the existing shingles are secure and flat.

3. Underlayment Installation Apply a layer of roofing felt or vapor barrier over the old shingles. This underlayment protects against moisture infiltration and prepares the surface for the roll roofing.

4. Roll Roofing Application Start at the lowest point of the roof and unroll the roll roofing material, ensuring it overlaps the edges appropriately. Secure the material with roofing nails or staples, following the manufacturer's recommendations for overlapping seams.

5. Sealing and Finishing After applying the roll roofing, seal edges and seams with roofing cement to ensure a watertight seal. Finally, inspect your work to ensure everything is secure and adequately finished.

Conclusion

Roll roofing over existing shingles is a practical and efficient way to rejuvenate your roof without the extensive process of a full replacement. While there are advantages to this method, it's essential to consider local regulations, structural integrity, and the quality of installation. With proper planning and execution, homeowners can enjoy a reliable and cost-effective roofing solution for years to come.