What a Roofer's Manufacturer Certification Means
A roofer's manufacturer certification means the shingle maker has enrolled the company in its contractor program, and for a homeowner its practical effect is the warranty. GAF's Master Elite, Certified Plus and Certified contractors can offer GAF's enhanced system warranties, with the top Golden Pledge only from Master Elite; Owens Corning's Platinum Preferred contractors are the only ones who can offer its best roofing system warranty; CertainTeed's credentialed contractors, at its MASTER, PRO and PREMIER levels, can offer its extended warranties. The makers describe what they check in general terms: GAF says its certified contractors must be licensed and insured where required and that it considers years of experience and customer reviews; CertainTeed calls credentialing recognition for completing its training. A certification isn't a state license and doesn't make the roofer the manufacturer's employee: GAF says it doesn't supervise its certified contractors, and Owens Corning that it doesn't guarantee their work. In California, the license that matters is a C-39 Roofing license, checked on the contractors board's site. This is as of October 2026.
It covers asphalt shingle roofs on houses. What each warranty covers, year by year, is in roof warranties explained, and how the brands' shingles compare in GAF vs Owens Corning vs CertainTeed vs Malarkey.
The three programs side by side
Each maker runs its own program, with its own names and levels, and each ties its enhanced warranties to them.
| GAF | Owens Corning | CertainTeed | |
|---|---|---|---|
| Levels | Certified, Certified Plus, Master Elite; President's Club awards for some Master Elite contractors | Preferred, Platinum Preferred | MASTER, PRO, PREMIER for companies; Master Craftsman credentials for individuals |
| What the maker says it checks | Licensed and insured where required; years of roofing experience; customer reviews | Preferred: high standards and strict requirements for professionalism and reliability; Platinum Preferred: strict standards for professionalism, reliability and craftsmanship | Credentialing is recognition for completing specialized training; installers pass the Shingle Applicator Manual test for the Master Craftsman contractor credential |
| Warranties it unlocks | Certified: System Plus. Certified Plus: System Plus and Silver Pledge. Master Elite: those and Golden Pledge | Preferred and Platinum Preferred: the extended system warranties. Platinum Preferred only: the top Platinum Protection | Extended warranties, rising with the credential level |
| What the maker says it isn't | Contractors aren't GAF's employees or agents, and GAF doesn't control or supervise them | Listed contractors are independent; Owens Corning doesn't guarantee the quality of their work | — |
GAF adds that its certified contractors may receive benefits from GAF, such as loyalty points and marketing discounts, for joining the program and offering its enhanced warranties, which require using a minimum amount of GAF products.
What a certification tells you, and what it doesn't
It tells you that:
- The roofer can offer that maker's enhanced warranty, on a roof built from enough of that maker's products, registered by the roofer. The standard material warranty comes with the shingles whoever installs them; GAF's own table lists its basic shingle and roofing system warranties for non-certified installers too.
- The roofer met the maker's program criteria for the current period, as the maker describes them.
It doesn't tell you that:
- The roofer is licensed in California. That's the contractors board's job: roofing work needs a contractor license with the C-39 Roofing classification, or a general building license where the law allows it, and every active C-39 contractor has to carry workers' compensation insurance or a certificate of self-insurance, whether or not it has employees (Business and Professions Code 7125). Check both on the CSLB's license lookup.
- The maker stands behind the workmanship by default. Only some of the system warranties cover installation errors, and only when the roofer registers them; what each covers is in roof warranties explained.
- The roofer is better than an uncertified one on your roof. The makers describe their programs, not your job; a roofer can install a brand without being in its program, and programs change their names and levels over time.
How to check a certification
1. On the maker's site. GAF has a page for checking whether a contractor is factory-certified, Owens Corning a contractor locator showing Preferred and Platinum Preferred members, and CertainTeed a Find a Pro directory of credentialed contractors.
- Against the contract. Ask which warranty the roofer will register, by name, for which shingle and accessories, and who registers it and by when; Owens Corning's extended warranties, for example, are registered by the Preferred or Platinum Preferred contractor.
- On the CSLB site. The license number, its classifications and its workers' compensation status.
- In writing. Keep the registered warranty certificate with the permit final; a roofer's own workmanship warranty is a separate document.
Frequently asked
What does GAF Master Elite mean?
Do I need a certified roofer to get a manufacturer warranty?
Is a manufacturer certification the same as a contractor license?
How do I verify a roofer's certification?
Does a certified roofer get anything from the manufacturer?
Related reading
Sources & methodology
Code sections, rules and figures on this page come from the primary sources below. Codes, local requirements and product terms change; each was verified October 9, 2026.
- GAF, Why Choose a GAF Certified Roofer?
- GAF, Is My Contractor Factory-Certified by GAF?
- Owens Corning Roofing, Independent Roofing Contractors Near Me
- CertainTeed, Roofing Education Credential US
- CertainTeed, Why Credentialing Matters
- California Business and Professions Code §7125 (workers' compensation)
- Contractors State License Board, check a license
We'll tell you which warranty your roof can carry
Call (323) 844-7777. We'll go over the shingle line and accessories for your roof, which manufacturer warranty that system qualifies for, and who registers it, and our California license is on the CSLB site. Have ready the address and any quotes you're comparing, with the warranty each one names.
Prepared by Cali Energy, October 9, 2026. This article is for general educational purposes only and is not legal, tax, financial, engineering, or utility advice. Rates, incentives, codes, permit requirements, equipment specifications, prices, and program terms may change; figures and timelines are estimates, not guarantees. Confirm current requirements with the applicable utility, AHJ, program administrator, manufacturer, or a licensed professional. See our Content Disclaimer. Cali Energy · 19201 Parthenia St, Unit E, Northridge, CA 91324 · CSLB #1032379 (B, C-10, C-39)