Last updated: August 2026
Our treatment penetrates the shingle rather than coating it, and we provide our own 5-year transferable warranty on the work. Because manufacturer shingle warranties from companies like GAF, Owens Corning, and CertainTeed cover manufacturing defects and are limited and prorated by age, we recommend confirming your specific manufacturer's terms; we do not claim to override them.
What do manufacturer shingle warranties actually cover?
It helps to understand what a shingle warranty is before asking how rejuvenation relates to it. Warranties from major manufacturers — GAF, Owens Corning, CertainTeed and others — primarily cover manufacturing defects: shingles that fail because of a flaw in how they were made, not shingles that simply wore out from decades of sun and weather. These warranties are also typically prorated, meaning the coverage amount steps down as the roof ages. A defect discovered in year two is treated very differently from one discovered in year eighteen, and much of what these warranties advertise depends on registration, professional installation, and following the manufacturer's own maintenance guidance.
In practice, that means the value of a manufacturer warranty on an older roof is often more limited than homeowners expect — not because of anything a homeowner did, but because that's how the warranties are structured.
How does rejuvenation interact with a manufacturer warranty?
The most important technical point is how the treatment works: our treatment penetrates the shingle rather than coating it. It's a spray-applied, bio-based oil that soaks into the asphalt to restore flexibility, rather than a film or coating that sits on top of the shingle surface. That distinction matters because some manufacturer terms speak specifically to surface coatings and films.
That said, warranty terms vary by manufacturer, by product line, and by the year your roof was installed. We can't read your specific warranty for you, and we won't pretend to. What we can tell you is that we do not claim to override, extend, or replace your manufacturer's warranty — those remain between you and the manufacturer. The responsible approach is to confirm your specific manufacturer's terms before treatment, which you can do by checking your warranty documents or contacting the manufacturer directly. If you're unsure where to start, we're glad to help you find the right paperwork.
What warranty does Roof Rejuvenate Lancaster provide?
Separate from anything the shingle manufacturer offers, we stand behind our own work. We provide our own 5-year transferable warranty on the rejuvenation treatment. Each treatment adds 5 years of restored shingle flexibility, and because the warranty is transferable, it can carry over if you sell your home during the coverage period — which can be a modest selling point for a buyer. With periodic re-treatment, many asphalt roofs gain 10–15 years of added service life.
You can read the specifics on our warranty and shingle warranty page, which covers both our own warranty and how it sits alongside manufacturer coverage.
Should I confirm my warranty terms before treatment?
Yes — and we'd rather you do. Because most shingle warranties are limited and prorated by age, the smart move for any homeowner is to know exactly what coverage you currently have before adding any treatment or making any change to your roof. Here's a simple checklist:
- Find your original warranty document or registration confirmation (often kept with closing paperwork or the installer's file).
- Note the manufacturer and product line — GAF, Owens Corning, CertainTeed, or another — and the installation year.
- Read the sections on prorated coverage and on coatings, films, or surface treatments.
- If anything is unclear, contact the manufacturer directly to confirm how your specific terms apply.
Doing this puts you in control of the decision with full information, which is exactly where you should be.
The honest bottom line
Rejuvenation is meant for asphalt roofs that are aging but not damaged — it restores flexibility, it doesn't fix leaks, flashing, or missing shingles. On the warranty question specifically, our position is straightforward: we back our work with a 5-year transferable warranty, our treatment penetrates rather than coats, and your manufacturer's warranty is something we encourage you to verify on your own terms. We're not going to make promises about coverage we don't control.
Have a warranty question about your specific roof? Book a free inspection or call and we'll talk it through honestly.