Home › Guides › Which Roofing Manufacturer Contractor Programs Are Worth Joining? Owens Corning, CertainTeed and GAF Compared (2026)
Which Roofing Manufacturer Contractor Programs Are Worth Joining?
Short answer: No program is worth joining for every roofer. Owens Corning, CertainTeed and GAF each run a contractor network that lists you in their "find a pro" search, and the pages we could open tie the top tier to a stronger warranty or to company training. The exact requirements are mostly not stated publicly, so ask each company before you apply.
- Owens Corning lists two contractor levels, Preferred and Platinum Preferred, in its public contractor search (checked Nov 2026).
- Owens Corning's page says only Platinum Preferred contractors can offer its best roofing system warranty.
- CertainTeed's page says its credentialed contractors complete specialized CertainTeed training.
- None of the pages we opened state the full requirements, fees or minimum job counts for a tier.
- GAF's contractor pages would not open for us, so we list GAF's facts as "not stated".
We build websites for roofers, and we are not paid by any shingle maker. Every fact below comes from the company's own page, opened on 8 November 2026. We did not apply to any program, so we cannot tell you what it costs to join or how long it takes. Where a page does not say, the table says "not stated".
A manufacturer contractor program is a list of roofers a shingle maker has approved to install its products, usually with training and a warranty that the maker backs. It is not a license. Your state or county license is a separate legal requirement, and a program badge does not replace it. See how to tell if a roofing company is legit for what homeowners check.
How we compared them
We used five plain criteria, all things a roofer can check before applying.
- Tiers. How many levels the page names, and what they are called.
- Requirements. What the page says you must meet.
- Warranty link. Whether a tier unlocks a stronger warranty you can offer homeowners.
- Homeowner search. Whether the company lists contractors for homeowners to find, and what that search shows.
- Cost and effort. Fees, training time or volume minimums, if stated.
We did not score or rank anything. We did not interview contractors in each program. Where a page is silent, we say "not stated".
How do the main programs compare?
Facts checked November 2026.
| Program | Tiers named on the page | Requirements stated | Warranty link | Homeowner search |
|---|---|---|---|---|
| Owens Corning Roofing | Preferred Contractor and Platinum Preferred Contractor | Preferred: "high standards and strict requirements for professionalism and reliability". Platinum Preferred: "strict standards for professionalism, reliability and unparalleled craftsmanship". No specific criteria | Only Platinum Preferred contractors can offer its best roofing system warranty | Search by location, with filters for contractor level, languages and average rating, and sorting by review count |
| CertainTeed | "Credentialed" contractors, with "highest credentialed" mentioned. Tier names not stated on the pages we opened | Complete specialized CertainTeed training and show product and installation expertise. No specific criteria | Page mentions "trusted warranty support". Which tier gets which warranty is not stated | Find a Pro page. Homeowners can also ask CertainTeed to share their project with 3 of its highest credentialed contractors |
| GAF | Not stated. The page blocked our request | Not stated | Not stated | Not stated |
| Your own proof, no program | Not applicable | Your state license, insurance and reviews | Your own workmanship warranty, in writing | Your Google Business Profile and site |
Two things stand out from the table. First, the public pages sell the program to homeowners, not to contractors. They tell a homeowner why a badge is good. They do not tell you what it takes to earn one. Second, the strongest fact on any of these pages is the Owens Corning one: a top tier is the only way to offer its best warranty. That is the sort of thing that could matter to a homeowner paying for a full replacement.
CertainTeed's residential roofing page lists product warranties, such as SureStart protection that its page says covers early-life defects, typically for 10 years, and lifetime limited transferable warranties on most residential applications. That is a product warranty, and the page does not tie it to a contractor tier.
Best fit if...
Owens Corning Preferred is a fit if you want to show up in a search that homeowners can filter by contractor level and star rating. Its search shows star ratings and review counts next to each contractor, so ask Owens Corning where those reviews come from.
Owens Corning Platinum Preferred is a fit if your jobs are full replacements where a stronger warranty helps you close, and you can meet requirements the company has not published. Ask for the list before you spend time on it.
CertainTeed credentialed is a fit if you want manufacturer training and are happy to be one of several roofers a CertainTeed rep may send a lead to. The page says CertainTeed shares a project with three of its highest credentialed contractors, so expect to compete with two others on those leads.
GAF is a fit if you already buy GAF product from your supplier. We cannot give any fact about its programs, since its pages blocked our request. Read GAF's own contractor pages and ask your distributor.
No program is a fit if you want to keep your options open, or you install several brands. A badge from one maker may tell a homeowner you sell that maker's shingles, and little else.
What should a roofer ask before joining?
Programs rarely list their terms in public. Use this checklist when you call a rep.
| # | Question | Why it matters |
|---|---|---|
| 1 | What are the exact requirements for each tier? | The pages we opened do not list them |
| 2 | Is there a fee, and is it yearly? | Not stated on any page we opened |
| 3 | Do I need to buy a set amount of product? | A minimum could push you toward one brand |
| 4 | Which warranties can I offer at each tier? | This is the benefit homeowners see |
| 5 | Who pays if a warranty claim is denied, you or the maker? | Read the warranty terms before you promise a homeowner anything |
| 6 | Do I get leads, and how many other roofers get the same lead? | CertainTeed's page mentions sharing a project with 3 contractors |
| 7 | Can I use the badge on my site, and what are the rules? | Badge rules are not stated on the pages we opened |
| 8 | What happens if a homeowner complains? | Find out how reviews and complaints affect your tier |
Get the answers in writing, not on the phone. Do not repeat a claim on your own site, such as "top rated" or "certified", unless the program lets you and the claim is true today.
What matters more than a badge?
A manufacturer badge helps most with homeowners who search the maker's site. Most homeowners start on Google, where local ranking depends on relevance, distance and prominence, and reviews and links from other sites feed prominence (Google Business Profile help: Improve your local ranking). So a badge adds to your reviews and your site. It does not replace them. Our guides on roofer Google Business Profile tips and how many reviews a roofer needs cover the basics.
If you join a program, say so on your site in plain words, with the exact name of the tier. Our guide on what a roofing website must have shows where trust signals go. Lead sources are a different question, and the best lead sources for roofers compares those. For one more example of a state that licenses roofers, see Florida, and see do roofers need a license number on their website.
The hub guide on online directories for contractors covers directories across trades.
When to pick something else
Skip a program if you cannot find the requirements and the rep will not send them in writing.
Skip it if you cannot meet the training or the product commitments. A tier you cannot keep is worse than no tier, because you must take down the badge.
Skip it if your main work is repairs and storm claims. A warranty tier mostly helps on full replacements. For those jobs, your inspection photos and your measurements help more. See roof measurement software compared.
Skip it if you cannot back your own workmanship in writing. Read each warranty's terms to see what it covers, and what falls to you.
If you want a site that shows your own proof and takes estimate requests, you can see a free demo site.
Common questions
What is the best roofing manufacturer certification?
We cannot name one, because the pages we opened do not state requirements or fees for any program. Owens Corning's page ties its top tier to its best warranty. CertainTeed's page ties its credential to company training. Compare them on those two facts, then call each company.
Is a manufacturer certification the same as a roofing license?
No. A manufacturer program is a private approval from a shingle maker. A roofing license comes from your state or local government where required. A badge does not replace a license, so show your license number where your state requires it.
Does Owens Corning charge for Preferred Contractor status?
Not stated. Owens Corning's contractor page describes Preferred and Platinum Preferred as networks that meet its standards, and it does not list a fee. Ask the company directly.
Can I join more than one manufacturer's program?
Not stated. None of the pages we opened say whether you can hold credentials from more than one maker. Ask each company before you apply.
Sources
- Owens Corning Roofing: Find a roofing contractor
- CertainTeed: Find a Pro
- CertainTeed: Residential roofing
- Google Business Profile help: Improve your local ranking
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