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roll roofing over existing shingles

Roll Roofing Over Existing Shingles A Practical Guide

When it comes to roofing options, homeowners often seek efficiency and cost-effectiveness. One popular solution that's gaining traction is the installation of roll roofing over existing shingles. This method can save time, money, and the hassle of tearing off old roofing materials. In this article, we will explore the benefits, considerations, and steps involved in roll roofing installation over existing shingles.

Understanding Roll Roofing

Roll roofing is a type of roofing material that comes in large rolls, typically made from modified bitumen or asphalt. It’s lightweight, easy to handle, and designed for flat or low-slope roofs. While traditionally used for commercial buildings, roll roofing is increasingly being used for residential projects, particularly in areas where flat roofs are common.

Benefits of Installing Roll Roofing Over Existing Shingles

1. Cost-Effectiveness One of the most significant advantages is the reduced labor and disposal costs. Homeowners can save money by skipping the costly and labor-intensive process of removing old shingles. Instead, roll roofing can be applied directly over the existing layer.

2. Time-Saving The installation process for roll roofing is relatively quick. Since it can be laid on top of existing shingles, homeowners can avoid delays associated with roof removal and prepare the roof for installation in a fraction of the time.

3. Durability and Weather Resistance Modern roll roofing materials are designed to withstand various weather conditions, making them suitable for many climates. They are water-resistant and can provide adequate protection against the elements, especially when properly installed.

4. Minimal Disruption Installing roll roofing is less disruptive than tearing off old shingles. Homeowners can stay in their homes during the process, which is particularly beneficial for those with busy lifestyles or small children.

Considerations Before Installation

Before proceeding with roll roofing, several factors should be taken into account

roll roofing over existing shingles

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1. Roof Condition It's crucial to assess the condition of the existing shingles. If there are signs of severe damage, like curling, cracking, or significant leaks, it may be wise to address these issues before installing roll roofing.

2. Building Codes Check local building codes and regulations regarding roofing materials. Some jurisdictions have specific requirements that must be met, including the number of layers allowed on a roof.

3. Flat vs. Sloped Roofs While roll roofing is an excellent option for flat or low-slope roofs, it may not perform as well on steep slopes. Ensure your roof's design is compatible with roll roofing.

4. Installation Quality Proper installation is key to maximizing the lifespan and effectiveness of roll roofing. Homeowners should consider hiring a professional roofing contractor with experience in roll roofing systems to ensure the job is done correctly.

Steps for Installing Roll Roofing Over Existing Shingles

1. Preparation Clean the existing shingles to remove any debris, moss, or dirt. Ensure the surface is dry and level.

2. Underlayment Consider adding a layer of roofing felt as an underlayment. This provides an additional moisture barrier and can increase the roof’s longevity.

3. Rolling Out the Material Start from the lowest point of the roof and unroll the roll roofing. Overlap the edges according to the manufacturer's recommendations to ensure proper sealing.

4. Fastening Use roofing nails to secure the roll roofing in place, ensuring that they are placed in the right locations to hold the material firmly without damaging it.

5. Sealing Finally, apply a sealant to the seams and edges to prevent water infiltration.

By following these guidelines, homeowners can successfully install roll roofing over existing shingles, providing a practical and efficient solution to their roofing needs.

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