installing rolled roofing over shingles

Installing Rolled Roofing Over Shingles A Practical Guide

When it comes to roofing materials, homeowners are often faced with numerous choices. Among them, rolled roofing is a popular option due to its affordability, ease of installation, and suitability for various roofing applications. If you are considering installing rolled roofing over existing shingles, this guide will take you through the process, highlighting key points to ensure a successful installation.

Understanding Rolled Roofing

Rolled roofing is a type of material typically made from asphalt-saturated felt or fiberglass that comes in large rolls. It is often used for flat or low-slope roofs but can also be effectively applied over existing shingles. One of the main advantages of using rolled roofing is its cost-effectiveness; it is significantly cheaper than traditional shingles while providing good durability and weatherproofing if installed correctly.

Benefits of Installing Rolled Roofing Over Shingles

1. Cost Efficiency By installing rolled roofing over shingles, you can save on disposal costs and labor associated with tearing off the existing shingles.

2. Time-Saving The installation process of rolled roofing can be completed more quickly than a full roof replacement, making it an appealing option for homeowners looking to update their roofs without extensive renovations.

3. Added Protection The new layer of rolled roofing can enhance the moisture and weather resistance of your roof, helping to extend its overall lifespan.

4. Energy Efficiency Depending on the type of rolled roofing you select, it may contribute to improved energy efficiency in your home, reducing heat absorption and keeping indoor temperatures more stable.

Preparing for Installation

Before beginning your project, you must prepare the roof properly. Here are some steps to follow

1. Inspect the Existing Roof Check the shingles for any damage, such as curling, cracking, or missing pieces. Issues should be repaired before installation to ensure a smooth surface.

2. Clean the Roof Remove any debris, leaves, or dirt from the roof surface. A clean area will promote better adhesion for the rolled roofing.

3. Check for Proper Ventilation Ensure your roof has adequate ventilation to prevent moisture buildup, which can lead to mold and deterioration of both the shingles and the new roofing material.

Installation Process

Once your preparations are complete, you can proceed with the installation of rolled roofing over shingles. Follow these steps

1. Gather Materials You will need rolled roofing material, roofing nails, roofing cement, a utility knife, a nail gun (or hammer), and a measuring tape.

2. Cut the Rolls Measure the length of your roof panels and cut the rolls into manageable sections. This will make it easier to handle during installation.

3. Lay the First Row Start at the lowest point of the roof and lay the first piece of rolled roofing across the shingles, ensuring it overlaps the edge of the roof slightly. Nail the edges securely to the shingles below using roofing nails, spacing them about 12 inches apart.

4. Overlap Subsequent Rows For the next rows, ensure to overlap the previous row by at least 4 inches to prevent water from seeping underneath. Continue this process along the roof until you reach the top.

5. Seal the Seams Once all rows are laid, apply roofing cement along the seams and edges to ensure a watertight seal. This step is critical to prevent leaks.

6. Final Inspection After completing the installation, inspect the entire roof for secure fastening and proper sealing. Make any necessary adjustments to ensure everything is tightly sealed.

Conclusion

Installing rolled roofing over shingles is an effective way to enhance the durability and appearance of your roof without the additional costs and labor of a complete roof replacement. With proper materials and careful installation, you can create a new layer of protection that can withstand the elements. Whether you are looking to extend your roof's life or simply update its look, rolled roofing offers a practical solution worth considering. Always remember to consult with a professional if you are uncertain about any step in the process, ensuring a safe and successful installation.