Roof Warranties Explained: Manufacturer vs. Workmanship

A new roof usually comes with two separate warranties. The manufacturer's warranty covers defects in the roofing materials. The workmanship warranty comes from the roofing company and covers the installation. They are written by different companies, last for different lengths of time, and fail for different reasons, so a roof can have a long material warranty and almost no coverage for the way it was put on.

A material warranty does not pay for mistakes in flashing, nailing or ventilation, which is why the workmanship warranty deserves as much attention as the headline material warranty. This article explains both, what "limited lifetime" means, and the conditions that can reduce or void coverage.

The two warranties side by side

The National Roofing Contractors Association (NRCA) describes the split this way: the manufacturer's warranty generally covers defects in the manufacture of the roof covering, with coverage that can run from 20 years to a lifetime, and the roofing contractor's workmanship warranty typically covers installation and related issues ¹. NRCA adds that many contractors offer one or two years of workmanship coverage, and that there is no industry standard ¹.

Low-slope (flat) roofs can be different. NRCA notes that makers of low-slope roofing materials may not offer material warranties to homeowners, so the only warranty available may be the contractor's ¹.

What "limited lifetime" means

Federal law shapes the words on a warranty. Under the Magnuson-Moss Warranty Act, a written warranty on a consumer product costing more than $10 must be titled either "full" or "limited," and a "full" warranty must meet federal minimum standards; any warranty that misses one of those standards is "limited" ³. Most roofing material warranties are titled limited.

"Lifetime" also needs reading. The FTC tells businesses to make clear which "life" a lifetime warranty measures ³. One manufacturer, Owens Corning, defines limited lifetime coverage for an owner of a single-family detached home as coverage for manufacturing defects for as long as that owner owns the home, with shorter coverage for other kinds of buildings ².

Full coverage first, then less

Many material warranties pay more in the early years than later. The FTC describes a pro rata warranty as one whose refund or credit decreases over the life of the product ³. Owens Corning's version is a set period at the start, which it calls TRU PROtection, in which coverage includes labor to repair or replace defective materials; after that period, the coverage is for materials only ². On its standard product warranty, that first period is 10 years; on its extended warranties it is 50 years ². Wind blow-off coverage on all of its listed tiers runs for the first 15 years ².

The question to ask about any material warranty is the same: for how many years does it pay for labor and tear-off as well as materials, and what does it pay after that?

Extended and "system" warranties

Manufacturers often sell or offer longer warranty tiers that depend on two things: using more of the maker's own components, and having the roof installed by a contractor in the maker's contractor program. Owens Corning's table shows both. Its extended tiers require a minimum number of its own roofing components, such as hip and ridge shingles and underlayment, and must be installed by one of its Preferred or Platinum contractors ². Its standard product warranty includes no workmanship coverage, while its top two extended tiers add workmanship coverage of 10 years and of a limited lifetime that is reduced after 25 years ². Owens Corning also notes that its program contractors are authorized, but not obligated, to offer an extended warranty, and that homeowners should discuss it before installation ².

Because tiers differ this much, a quote that just says "lifetime warranty" is incomplete. Ask for the name of the warranty tier, which components it requires, and whether the contractor is in a program that can offer it. We are not affiliated with the manufacturers named.

What can reduce or void a warranty

Warranty terms differ by manufacturer and product, but a few conditions come up again and again. NRCA advises reading the warranty and making sure you understand the provisions that will void it ⁴. Common ones:

• Installation that does not follow the instructions. Owens Corning says that for its standard product warranties anyone can install the shingles, as long as its installation instructions and local building codes are followed ². Fixr notes that manufacturers will almost always void a roof's warranty if the materials are not installed by a professional ⁵.
• Inadequate ventilation. NRCA says asphalt shingle manufacturers' warranties may make coverage conditional on meeting minimum ventilation requirements ¹.
• Mixing components. Extended tiers can require a set number of the maker's own components ².
• Not registering. Some warranties need registration. NRCA suggests making sure the contractor gives you a warranty certificate when the project is complete ¹. Owens Corning lists the installation date, shingle type, color and number of squares as the information needed to register ².
• Coverage tied to the warranty in force at installation. Owens Corning says coverage is based on the warranty in effect when the shingles were installed ², so keep a copy of that version.

Transferring a roof warranty when you sell

A transferable warranty can matter to a buyer, but transfers usually have conditions. Owens Corning, for example, says the second owner must contact it within 60 days after the real estate transfer, with proof of ownership, and that some warranties carry a transfer fee, which its page describes as upwards of $100 depending on the warranty terms ². Other makers set their own rules, so check the transfer section of the warranty you actually have.

Workmanship warranties are written by the roofing company, so whether they transfer depends entirely on its wording.

Warranty questions for every quote

• Which manufacturer warranty tier is included, by name?
• For how many years does it cover labor and tear-off, not just materials?
• How long is your workmanship warranty, and is it in writing?
• Who registers the manufacturer warranty, and when will I get the certificate?
• Does either warranty transfer if I sell, and is there a fee?
• What does the ventilation plan look like, and does it meet the manufacturer's requirements?

Fixr notes that companies offering longer or broader coverage often charge more for labor ⁵, so compare warranty terms alongside price in your quote comparison. The guide to choosing a roofing contractor covers the rest of the vetting, and the roof replacement cost guide covers price.

RooferProMatch is a lead-generation service, not a roofer, and is paid by roofing companies when a reader requests quotes. We do not issue or back any warranty. If you want to compare warranty terms across companies, you can request quotes from roofing companies near you.

About these figures

• ¹ Reported: NRCA consumer FAQ on manufacturer warranties (20 years to a lifetime), workmanship warranties (often one or two years, no standard), low-slope warranties, ventilation conditions and warranty certificates, checked November 11, 2026.
• ² Reported: Owens Corning warranty page (10-year and 50-year TRU PROtection periods, 15-year blow-off coverage, workmanship coverage by tier, component and contractor requirements, registration, 60-day transfer window and fee upwards of $100), checked November 11, 2026.
• ³ Official record: FTC guide to federal warranty law ("full" or "limited" titles on products over $10, lifetime and pro rata warranties), checked November 11, 2026.
• ⁴ Reported: NRCA advice to read the warranty's voiding provisions, checked November 11, 2026.
• ⁵ Reported: Fixr notes on warranty voiding and labor rates for longer coverage, updated February 4, 2026, checked November 11, 2026.