Dec . 11, 2024 18:47 Back to list

rolled roofing over shingles

Understanding the Pros and Cons of Installing Rolled Roofing Over Shingles

When it comes to roofing materials, homeowners often find themselves navigating a sea of options and considerations. Among these, a common query arises can you install rolled roofing over existing shingles? The short answer is yes, rolled roofing can be installed over shingles, but there are several factors to consider before making this decision.

What is Rolled Roofing?

Rolled roofing is a cost-effective and easy-to-install roofing material, typically made from asphalt. It comes in large rolls, making it suitable for flat or low-slope roofs, such as those on sheds or garages. Rolled roofing is generally less expensive than traditional shingles; however, it has its pros and cons that homeowners should weigh.

The Pros of Installing Rolled Roofing Over Shingles

1. Cost-Effective Solution One of the most significant advantages of rolled roofing is its affordability. If you are looking to save on labor and material costs, installing rolled roofing over existing shingles can be a practical option.

2. Ease of Installation Rolled roofing can be installed relatively quickly and easily, making it an attractive choice for DIY enthusiasts. By placing it over existing shingles, homeowners can avoid the time-consuming process of removing the old roofing material.

3. Added Layer of Protection Adding rolled roofing over shingles can provide an extra layer of protection against the elements. This can be especially beneficial for roofs that experience heavy rainfall or snow, as the additional layer can help prevent leaks.

rolled roofing over shingles

4. Fewer Landfill Contributions By choosing to install rolled roofing over existing shingles, homeowners can minimize waste by not having to tear off the old shingles, thereby reducing the amount of material that ends up in landfills.

The Cons of Installing Rolled Roofing Over Shingles

1. Increased Weight Adding rolled roofing over existing shingles will increase the overall weight on the roof structure. It's essential to ensure that the underlying framework can support the additional load to avoid any structural issues.

2. Potential for Moisture Trapping One significant concern when layering roofing materials is the potential for moisture to become trapped between the layers. If the existing shingles are damaged or if moisture gets trapped, it could lead to mold growth and eventual leaks.

3. Limited Lifespan While rolled roofing is cost-effective, it generally has a shorter lifespan than traditional shingles. This means that while you save money initially, you might need to replace it sooner than you would with standard roofing materials.

4. Possible Warranty Issues Some roofing manufacturers may void the warranty if their shingles are covered with another roofing material. It's important to check with manufacturers before proceeding with this kind of installation.

Conclusion

Installing rolled roofing over shingles can be a practical, cost-effective solution for many homeowners, especially those looking to improve a flat or low-slope roof. However, it is essential to consider the potential downsides and ensure that the structural integrity of the roof can handle the additional weight. Additionally, checking for moisture issues and understanding the implications for warranty coverage are key steps before proceeding. Ultimately, weighing both the pros and cons will help you make an informed decision on whether this roofing solution is right for your home.

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