When homeowners contemplate a roof replacement, one question often looms large: Can a new metal roof be installed directly over existing shingles? This guide delves deep into the considerations, benefits, and potential pitfalls of such an endeavor.
The Underlying Concerns
While it’s technically possible to lay metal panels over shingles, The Roofing Center typically advises against it. Why? Installing a metal roof over an old shingled one can mask underlying issues like water damage, mold, or rot. By doing so, you risk future complications that might necessitate removing the newly installed metal roof to address problems originating from the old shingles or underlayment.
Moreover, the abrasive nature of shingles can lead to backside wear on metal roofs due to temperature-induced expansion and contraction. This not only compromises the integrity of the metal roof but can also affect warranties.
Moisture Traps and Their Implications
Another significant concern is the potential for trapped water vapor and moisture between the old and new roofs. This can foster mold growth and rot, undermining the very purpose of a roof replacement. By stripping away the old roof before installing a new one, you can inspect the underlayment thoroughly, ensuring no damages that might lead to leaks or other issues with your new roof.
It’s also prudent to inspect the attic, checking for signs of leaks, rotten rafters, or other potential problems. Such diligence ensures that your new metal roof remains unaffected by any pre-existing damages.
Local Building Codes and Regulations
Before proceeding with a metal-over-shingle installation, always consult local building codes. Some jurisdictions mandate a complete tear-off for new roof installations. Others might restrict the number of shingle layers permissible, as outlined in the 2018 International Building Code.
Choosing the Right Metal Material
If you’re still inclined to install metal over shingles, consider opting for lighter metal materials like steel or aluminum. These materials reduce stress on your home’s structural components, ensuring longevity and safety. While metal roofs are generally lighter than shingles, The Roofing Center always emphasizes the importance of making informed decisions based on expert advice.
Seeking Expertise from The Roofing Center
For those in Bozeman, MT, The Roofing Center stands as one of the best Bozeman’s roofing contractors, offering unparalleled roofing service in Bozeman. Our team collaborates closely with homeowners, ensuring they select the right panel profile, gauge, and color for their specific needs. If you’re contemplating a DIY metal roof installation, always consult with our specialists to stay updated on best practices.
Conclusion
While installing a metal roof over shingles might seem like a time-saving solution, it’s essential to weigh the long-term implications. By partnering with trusted entities like The Roofing Center, homeowners can make informed decisions that ensure the longevity and performance of their roofs. Whether you’re looking for metal roofing in Bozeman MT or seeking guidance on roof installation in Bozeman, always prioritize expertise and quality.
