Roof Warranties Explained: Manufacturer vs. Workmanship

When a roofer says a new roof "comes with a warranty," it is fair to ask which one. Most shingle roofs involve at least two separate promises. One comes from the company that made the materials. The other comes from the contractor who installed them. They cover different problems, are claimed in different ways, and can end at different times.

This is general education, not a summary of any company's terms, including ours. The only document that tells you what your roof is covered for is the written warranty itself, so treat everything below as a list of things to look for in that document.

Two promises from two different parties

A warranty is a promise by a manufacturer or seller to stand behind what you bought. The FTC's warranty guide says you should be able to read the terms before you buy, and that a salesperson's spoken promise is only dependable once it is written down.

For roofing, Owens Corning's overview of roofing warranties describes three common types:

• A standard manufacturer warranty on the products
• A workmanship warranty from the contractor on the installation
• An extended manufacturer warranty, offered on some systems, that can add installation coverage and broader product coverage

We use Owens Corning's published material here only as an example; every manufacturer sets its own terms. The Texas Attorney General gives similar advice for any repair job: written promises should state what is covered, who is responsible (the dealer, the contractor, or the manufacturer), and how long coverage lasts (disaster scams guidance).

What a manufacturer warranty usually covers

A standard manufacturer warranty is mainly about product defects. Owens Corning's overview explains that most of these warranties cover defective materials, often with fuller coverage in the early years and prorated coverage after that. It also notes they generally do not pay when shingles fail because of installation mistakes, and they may not extend to other parts such as underlayment, flashing, or ventilation products, which can carry their own warranties.

Questions to ask about the product warranty:

• How long is the full-coverage period, and when does proration begin?
• Does it pay for labor, or only for materials?
• Are tear-off and disposal included if shingles must be replaced?
• What installation requirements must be met to keep coverage?

Owens Corning's warranty page, for instance, says its standard product warranties apply when shingles are installed following its instructions and local building codes. Expect any manufacturer to tie coverage to proper installation.

Illustrative photo: keeping warranty paperwork together in a home file.

What a workmanship warranty usually covers

A workmanship warranty is the contractor's promise about the installation itself: nailing, flashing details, underlayment placement, and the many small decisions made on your roof. Owens Corning's overview describes these warranties as typically paying for labor and materials to fix problems caused by installation errors, with terms that vary a great deal from one contractor to the next.

The same overview lists common exclusions unrelated to installation quality, such as storm, wind, and impact damage, changes made to the roof after installation, foot traffic, and falling limbs or debris. Storm damage is usually a question for your homeowners insurance, not for a warranty.

Because the contractor makes this promise, it is only as useful as the company behind it. Ask how to request warranty service, who you call, and whether the coverage stays with the house if you sell.

Registration, transfer, and extended coverage

Some benefits depend on paperwork. The FTC notes that certain warranties require registration before you qualify for service. Owens Corning's registration guide says its standard warranty can be registered at any time, while its extended warranties have to be registered by a participating contractor within 60 days of installation.

Transfer rules matter if you might sell. Owens Corning's warranty page says a second owner must contact the company within 60 days of the real estate transfer, with proof of ownership, and that a transfer fee may apply. Other manufacturers set different rules, so read the document for your product.

Extended warranties often require a set of matching components, such as underlayment, starter, and hip and ridge shingles from the same maker, installed by a contractor the manufacturer authorizes. If you are offered one, ask which components are required and confirm they appear on your estimate. Our guide to reading a roofing estimate line by line shows where to look.

What to get in writing before you sign

Before work starts, ask for:

• The manufacturer and the exact shingle product
• A copy of, or link to, the manufacturer warranty for that product
• The contractor's workmanship warranty, with its term, coverage, and exclusions
• Who registers each warranty, by when, and how you will get confirmation
• Any maintenance or ventilation conditions that could affect coverage

The Attorney General's home improvement guidance recommends making sure everything the salesperson promised ends up in the written contract. A warranty mentioned only in conversation is hard to rely on later.

Separately, WorkHorse Roofing offers 10 years of maintenance on new roofs. That is a maintenance offer, not a manufacturer or workmanship warranty, so ask what it includes and file it as its own item.

Keep a file you can find years from now

The FTC suggests keeping your warranty together with the receipt, which shows the purchase date and that you are the original owner. For a roof, that file should hold:

• The signed contract and final invoice
• Warranty documents and registration confirmations
• Product names, colors, and the installation date
• Photos taken during and after installation
• Maintenance and repair records

If you ever file a warranty claim, expect to be asked for proof of purchase and proof of ownership; Owens Corning's warranty page lists both and also asks for two shingle samples removed from the affected area. For the steps between signing and final walkthrough, see what a roof replacement involves, and for budgeting, see Houston roof replacement financing.

Questions about warranty terms on a roof you are considering? Call (210) 756-2374 to book a free roof check, and ask us to put any answer in writing.