When deciding between overlay and tear-off for a wood shake roof, it’s important to understand what each option involves and the conditions that make one better than the other. Overlaying means putting a new layer of shingles directly over the existing wood shakes, which can save time and money upfront. However, this can add extra weight and might trap moisture, leading to premature damage or rot beneath. Tear-off means removing the old wood shakes entirely before installing new roofing, allowing you to inspect the underlying decking for damage or rot, address any issues, and ensure a clean, solid foundation. Many manufacturer warranties require a tear-off for full coverage on a replacement roof, so sticking with this method can protect your investment in the long run. If your current roof has signs of widespread decay, curling, or missing shakes, a tear-off is typically the safer bet, while an overlay might work if the existing roof is still mostly sound and you're looking for a quicker fix.
To determine what’s best for your home, start with a simple visual inspection from the ground and, if safe, a closer look in your attic for leaks or water damage. You can gently lift a few shakes near the edge to check the condition of the decking underneath, but avoid climbing on a roof in poor condition. If you notice significant buckling or soft spots when walking, call a professional. When talking to a roofer, ask clearly if they recommend a tear-off based on the condition of your wood shakes and to explain how they’ll protect your home’s structure during the process. Also, inquire about how the choice affects your warranty coverage — will they offer a full manufacturer warranty with an overlay, or only with a tear-off job? These questions will help you choose the safest, most cost-effective solution for your wood shake roof.