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Quick, low-risk steps
- Ask for a copy of both the manufacturer and workmanship warranty documents before signing.
- Check what is excluded—such as improper ventilation, storm damage, or lack of maintenance.
- Confirm whether the workmanship warranty is backed by the contractor alone or a third-party insurer.
- Verify if the manufacturer warranty requires registration or specific installation methods.
- Document the installation with photos and keep all warranty paperwork in a safe place.
Manufacturer Warranty Basics
A manufacturer warranty is issued by the company that makes the roofing materials. It typically promises that the shingles or other products will be free from manufacturing defects for a certain number of years. Some warranties also include coverage for wind or algae resistance, but these often have specific wind-speed limits and may be prorated over time.
Coverage can range from a basic limited lifetime warranty to an enhanced system warranty that includes some labor costs if the materials fail. However, most manufacturer warranties do not cover installation errors, damage from foot traffic, or problems caused by inadequate attic ventilation. Always read the fine print to understand what is and is not included.
- Covers defects in the roofing material itself, not the installation.
- May be prorated, meaning coverage decreases over time.
- Often requires proper attic ventilation to remain valid.
- Some premium warranties include a short period of labor coverage.
- Registration may be required within a specific timeframe after installation.
Workmanship Warranty Explained
A workmanship warranty is provided by the roofing contractor and covers errors related to the installation of the roof. If a leak develops because of improper nailing, flashing, or underlayment installation, the contractor is responsible for fixing it under this warranty. The length of workmanship warranties varies significantly—some contractors offer one year, while others may offer five, ten, or more.
It is important to ask who backs the workmanship warranty. If it is only the contractor, the warranty is only as strong as the company's longevity and financial stability. Some contractors use third-party warranty programs that remain in effect even if the original installer goes out of business. Ask for details about how claims are handled and what response time to expect.
- Covers installation mistakes, such as leaks caused by poor flashing work.
- Duration varies widely; ask for the specific number of years.
- May be backed solely by the contractor or by a third-party warranty company.
- Often excludes damage from storms, falling objects, or homeowner neglect.
- Requires the contractor to remain in business to honor the warranty unless backed by a third party.
Common Exclusions and Limitations
Both manufacturer and workmanship warranties have exclusions. Damage from severe weather, such as hail or hurricanes, is typically not covered. Alterations to the roof made by other contractors, lack of proper maintenance, and improper ventilation can also void coverage. Some warranties require periodic inspections or specific maintenance records.
Additionally, many warranties do not cover consequential damage, such as water damage to the interior of the home caused by a roof leak. The warranty may only cover the repair or replacement of the roofing material itself. Understanding these limitations before you sign a contract can help you avoid surprises later.
- Storm damage is usually excluded; check your homeowner's insurance policy.
- Alterations by other contractors may void the warranty.
- Lack of maintenance or improper ventilation can nullify coverage.
- Consequential damage to the home's interior is often not covered.
- Some warranties require documentation of regular inspections.
Questions to Ask Your Contractor
Before hiring a contractor, ask for a written explanation of both the manufacturer and workmanship warranties. Request the actual warranty documents, not just a summary. Find out what you need to do to keep the warranty valid, such as registering the product or scheduling inspections.
Ask whether the workmanship warranty is backed by the contractor alone or by a third-party insurer. If it is backed by a third party, ask for the name of the insurer and how to file a claim. Also, ask about the process for transferring the warranty if you sell your home, as some warranties are transferable for a fee.
- Ask for the full warranty documents, not just a brochure.
- Find out what actions or conditions could void the warranty.
- Ask if the workmanship warranty is backed by a third-party insurer.
- Inquire about the claim process and typical response time.
- Check if the warranty is transferable to a new homeowner.
Take this with you
Evidence and scope checklist
- Request the full manufacturer warranty document before signing.
- Request the full workmanship warranty document before signing.
- Confirm the length of the workmanship warranty in years.
- Ask who backs the workmanship warranty (contractor or third party).
- Check for exclusions such as storm damage, ventilation issues, or alterations.
- Verify if the manufacturer warranty requires product registration.
- Ask about transferability and any associated fees.
- Document the installation with date-stamped photos.
Common questions
What homeowners ask next
What is the difference between a manufacturer warranty and a workmanship warranty?
A manufacturer warranty covers defects in the roofing materials, while a workmanship warranty covers errors in the installation. Both are important and should be reviewed carefully before signing a contract.
How long does a typical workmanship warranty last?
Workmanship warranties vary widely. Some contractors offer one year, while others may offer five, ten, or more. Always ask for the specific duration and who backs the warranty.
Are roof warranties transferable if I sell my home?
Some warranties are transferable, often for a fee and within a certain time frame after the sale. Check the warranty documents for transferability terms and any requirements.
Evidence
Sources used for this guide
Research checked July 31, 2026
- International Residential Code wind and roof compilationFEMA
Model-code background; locally adopted code and permits control.
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