reroof over existing asphalt shingles

Reroofing Over Existing Asphalt Shingles A Comprehensive Guide

Reroofing over existing asphalt shingles is a popular choice among homeowners considering roof replacement. This method involves laying new shingles on top of the old ones, providing a quicker and often more cost-effective solution than a complete tear-off. Below, we explore the benefits, considerations, and the step-by-step process of reroofing, helping homeowners make informed decisions about their roofing needs.

Benefits of Reroofing

One of the primary advantages of reroofing is the cost savings. Removing the existing shingles can be labor-intensive and messy, requiring additional disposal costs. By opting for reroofing, you can minimize these expenses while improving the aesthetic appeal of your home. Furthermore, since the new layer covers up any minor imperfections in the old roof, it can enhance your home’s curb appeal almost instantly.

Another significant benefit is time efficiency. Reroofing typically takes less time than a complete tear-off. Roofers can work quickly as they do not need to strip the existing shingles, allowing for a faster job completion. This is particularly beneficial for homeowners who need their roofing done promptly, perhaps due to an impending sale of the property or an upcoming event.

Considerations Before Reroofing

While reroofing over existing shingles has its advantages, there are several considerations to keep in mind. Most building codes allow only one additional layer of shingles on top of the existing roof; thus, if you already have two layers, you will need to remove them. Furthermore, the weight of the additional shingles must be accounted for. Each layer adds weight, and it’s essential to ensure that your roof structure can support this extra load.

Additionally, it’s crucial to assess the condition of the existing shingles. If the roof has significant damage, such as large cracks, missing shingles, or water leaks, a complete tear-off may be necessary. Reroofing over an already compromised roof can lead to further problems down the line, including mold growth and reduced structural integrity.

Before starting the reroofing process, proper preparation is essential. Begin by inspecting the roof for any damages that will need to be repaired. Look for signs of moisture underneath the shingles, and replace any rotted or damaged plywood sheathing. Make any necessary repairs to the underlying structure, ensuring a solid foundation for the new shingles.

Next, check local building codes and your homeowner’s association regulations to confirm that reroofing is permissible. Some areas may have restrictions on roofing materials and methods, and non-compliance can lead to fines or mandated removal of the newly installed roof.

The Reroofing Process

1. Material Selection Choose high-quality asphalt shingles that complement the style of your home. Consider also the warranty and longevity of the selected shingles.

2. Preparation Clear the roof surface of any debris. Install underlayment if necessary to provide an additional layer of protection against moisture.

3. Installing New Shingles Begin at the bottom edge of the roof, overlapping each row as you move upwards to ensure proper water runoff. Follow the manufacturer’s instructions for nail placement and spacing to guarantee optimal performance.

4. Ventilation Ensure adequate ventilation in the roofing system. Proper airflow can help prolong the life of both the old and new shingles.

5. Finishing Touches Once the shingles are installed, complete the project by sealing any edges and ensuring all vents and flashing are correctly positioned to prevent future leaks.

Conclusion

Reroofing over existing asphalt shingles can be a practical solution for homeowners looking to upgrade their roofs without the hassle and expense of a complete tear-off. With the right preparation, attention to detail, and a clear understanding of the process, homeowners can enjoy a new roof that enhances their home’s aesthetic and functional value. Always consult with a qualified roofing professional to ensure the best outcomes for your reroofing project, and secure your home against the elements for years to come.