In general, it is not recommended to reuse shingles on a new roof. While it may seem like a cost-saving measure, there are several reasons why reusing shingles is not advisable:
Warranty concerns: Shingle manufacturers typically provide warranties for their products when they are installed according to their guidelines. Reusing old shingles may void any warranties associated with the shingles, leaving you without protection if any issues arise in the future.
Compromised performance: Shingles are exposed to various weather conditions, including UV rays, rain, and wind over their lifespan. Reusing old shingles can compromise their performance and ability to protect your home adequately. They may be more prone to cracking, curling, or leaking, leading to potential problems down the line.
Inadequate attachment: During the removal process, shingles can sustain damage, such as torn edges or missing tabs. These damaged areas can impact the proper attachment of the shingles during reinstallation, potentially leading to leaks or wind uplift concerns.
Compatibility issues: New roofing materials and installation techniques may have changed since the original roof was installed. Reusing old shingles may not be compatible with these new materials or techniques, leading to an inferior installation.
Aesthetics: Shingles can age and weather differently, especially if they come from different batches or have been exposed to different environmental conditions. Reusing old shingles may result in an uneven or mismatched appearance on your new roof, which can affect the curb appeal of your home.
It's generally recommended to have a complete roof replacement with new shingles to ensure the best performance, longevity, and warranty coverage. If you're concerned about the cost, you may explore other options such as choosing more affordable shingle options or discussing financing options with your roofing contractor.