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Risks of Adding Another Layer of Shingles

Sep 27, 2024

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Fasto Roofing, located in Mason, OH, advises homeowners to carefully consider the risks associated with adding another layer of shingles to their existing roof. While it might seem like a cost-effective and less messy option, there are significant downsides to this approach.



Roofing Over Existing Shingles

Many homeowners consider this option to save on labor costs and avoid the mess of removing old shingles. However, the perceived benefits come with notable risks.


Cons of Roofing Over Existing Shingles

Roof Deck Issues

  • Unseen Damage: If the old roof has been leaking, the roof deck may be compromised. Without removing the old shingles, roofers cannot inspect and repair the deck, which could lead to ongoing structural problems and sagging.


Roofing Components

  • Hidden Problems: Critical components like flashing, vents, soffits, and fascia remain uninspected. Without removing the old shingles, potential issues go unnoticed, potentially leading to severe damage.


Structural Integrity

  • Extra Weight: Adding another layer increases the roof’s weight, which can strain the deck and cause cracks or further damage. Smaller or non-standard roofs may not support the added weight, posing structural risks.


Voided Warranties

  • Warranty Issues: Many manufacturers void warranties if shingles are installed over an existing layer. Additionally, local building codes, especially in storm-prone areas, may prohibit multiple layers due to increased wind damage risk.


Underlayment Concerns

  • Lack of Ice Barrier: If the old roof lacks proper underlayment or an ice barrier, adding another layer won’t address these deficiencies, leaving the roof susceptible to leaks and ice damage.


Working with a Roofer

Before deciding to add another layer of shingles, consult with a licensed and insured roofing company like Fasto Roofing. Professional roofers can inspect your roof and provide expert advice on whether this approach is suitable for your home. In most cases, roofers recommend against this practice due to the associated risks.


Conclusion

Adding another layer of shingles to your roof can seem like a cost-effective solution but carries significant risks. Consulting with professional roofers ensures you make an informed decision that protects your home’s structural integrity and long-term value.


For more information on 3 Key Cost Factors in Home Siding Replacement, click here.



Sep 27, 2024