Asonic Roofing: Why We Don't Install New Roofs Over Existing Ones

When it comes to roofing, the decision to install a new roof over an existing one is a topic of debate within the industry. Some homeowners may be tempted by the idea of cost savings and the convenience of avoiding a complete tear-off. However, at Asonic Roofing, we have a strict policy against installing new roofs over existing ones, and in this blog, we'll explain why.

1. Structural Integrity:
One of the primary reasons we don't install new roofs over existing ones is the potential compromise in structural integrity. A roof is more than just shingles; it's a system that includes underlayment, decking, flashing, and ventilation. When a new roof is placed over an old one, it can mask pre-existing issues that might affect the new installation. This hidden damage can lead to costly repairs down the road and even the risk of structural failure.

2. Weight Concerns:
Every roofing system is designed to support a specific amount of weight. Adding another layer of shingles can put extra stress on the structure, potentially leading to sagging or even collapse. It's vital to ensure that your roof's load-bearing capacity is not exceeded, and this can be accurately assessed only through a complete tear-off.

3. Moisture Trapping:
Moisture is a roof's enemy, and installing a new roof over an old one can trap moisture between the layers. This trapped moisture can lead to rot, mold, and a significant decrease in the lifespan of your roof. A full tear-off allows for a thorough inspection of the decking and the opportunity to address any moisture-related issues.

4. Warranty Concerns:
Roofing material manufacturers often void warranties when a new roof is placed over an existing one. This means that if you encounter problems with your new roof, you might not be covered for repairs or replacement, leaving you with additional expenses. A full replacement ensures that your roofing system is eligible for warranties, protecting your investment.

5. Aesthetics:
Aesthetics also play a significant role in our decision. Adding a new layer of shingles on top of old ones can result in a lumpy and uneven appearance, which detracts from the curb appeal of your home. A complete tear-off allows for a clean, fresh start with uniform, aesthetically pleasing results.

6. Environmental Impact:
From an environmental perspective, overlaying shingles contributes to landfill waste as the old roofing materials are left in place. By choosing a full tear-off, you're giving the opportunity for the old materials to be properly disposed of and potentially recycled.

7. Building Codes and Regulations:
In many areas, building codes and regulations prohibit overlaying multiple layers of roofing materials due to the concerns we've mentioned above. At Asonic Roofing, we prioritize compliance with local codes and regulations to ensure the safety and integrity of your roof.

In conclusion, while installing a new roof over an existing one may seem like a cost-effective solution, it often leads to more problems than it solves. At Asonic Roofing, our commitment to quality, safety, and longevity leads us to advocate for full tear-offs when replacing roofs. This ensures that your investment in a new roof is a wise and long-lasting one. If you're considering a roofing project, we encourage you to reach out to us for a thorough inspection and professional guidance on the best approach for your specific needs. Your home's protection and your peace of mind are our top priorities.

Contact us today for your free estimate!
403-462-2808
[email protected]
https://www.asonicroofing.ca/