Roofing squares, also known as asphalt shingles, are the most common roofing material used in the United States. They are cost-effective, durable, and offer a wide range of designs and colors to suit different architectural styles. Roofing squares are typically installed in overlapping layers to provide a protective barrier against weather elements.
Advantages of Installing Roofing Squares Over Existing Shingles:
1. Cost-Effective Solution:
One of the main advantages of installing roofing squares over existing shingles is the cost-effectiveness. By skipping the removal of the old shingles, you save on labor and disposal expenses. Additionally, you may not need to invest in new underlayment, which further reduces the overall cost of the project.
2. Time-Saving:
Another benefit is the time-saving aspect. Removing the existing shingles can be a time-consuming task, especially if the roof is large. By installing new shingles over the old ones, you can significantly reduce the installation time, allowing you to complete the project more quickly.
3. Extra Layer of Protection:
The existing shingles provide an additional layer of protection against moisture and other weather elements. This can be beneficial, especially if the old shingles are in good condition. The extra layer also adds more insulation, potentially improving energy efficiency.
Considerations and Potential Drawbacks:
1. Weight and Structural Integrity:
Before opting to install roofing squares over existing shingles, it is crucial to assess the structural integrity of the roof. Adding an extra layer of shingles increases the weight on the roof, which might exceed its load capacity. Consult a professional roofing contractor to evaluate whether the existing roof is strong enough to support the additional weight.
2. Compatibility and Warranty Void:
Certain roofing manufacturers may not warranty their products if installed over an existing layer of shingles. It is vital to check the warranty guidelines to ensure compliance. Moreover, compatibility issues between the old and new shingles can pose a challenge. Mixing different types or brands of shingles may result in an uneven appearance or reduced lifespan.
3. Concealing Potential Issues:
By installing new shingles over the existing ones, any underlying problems with the roof may be hidden. This prevents adequate inspection and repair of issues, such as water damage or rot. It is always recommended to address any existing problems before installing new roofing squares to ensure a long-lasting and durable roof.
While installing roofing squares over existing shingles can be a cost-effective and time-saving choice, it is essential to carefully consider the potential drawbacks. Structural integrity, warranty compliance, and the concealment of underlying issues must be thoroughly assessed before making a decision. Consultation with a professional roofing contractor is crucial to evaluate the suitability of this installation method for your specific circumstances. By weighing the advantages and disadvantages, you can make an informed choice that ensures a durable and secure roof for your home.