GAF is the largest roofing manufacturer in North America, and its shingles are on more American homes than any other brand. But the thing worth understanding before you sign a roofing contract is that GAF’s warranty coverage depends on who installs the roof, not just on which shingles go on it.
L&L Contractors is a GAF Certified contractor. Here’s what that designation requires, what it lets us put in writing, and why it matters more than the shingle you pick.
What Does GAF Certification Actually Require?
It’s not a sticker a contractor buys. To carry the GAF Certified designation, a roofing company has to document:
- A current state contractor license
- Liability insurance and workers’ compensation coverage in force
- Good standing with the Better Business Bureau
- Ongoing training on GAF systems and current installation methods
None of those individually is remarkable. Together they screen out a category of contractor that shows up in force after every hailstorm: uninsured, unlicensed, out of state, and gone by the time the roof leaks.
The certification also has to be maintained. It’s not a one-time award, which is why asking a contractor to show current certification is a reasonable request and a quick one to satisfy.
The Part That Costs You Money If You Get It Wrong: Warranties
This is the practical reason certification matters.
Every GAF shingle carries a standard manufacturer warranty against material defects, regardless of who installs it. That warranty covers the shingle. It does not cover the labor to tear off and replace a failed roof, and it does not cover workmanship.
That’s the gap that matters, because most roof failures are not defective shingles. They’re installation problems: nails in the wrong place, flashing done poorly, inadequate ventilation, starter strip skipped at the rakes.
Certification lets a contractor write enhanced warranty coverage that closes part of that gap. As a GAF Certified contractor, L&L can offer GAF’s System Plus and Silver Pledge limited warranties on qualifying roof systems, which extend coverage beyond the basic shingle warranty and include workmanship terms the standard warranty doesn’t.
Two conditions attach to any of it, and they catch people out:
- The roof has to be a qualifying GAF system, meaning the accessories go on with the shingles. Starter strip, ridge cap, underlayment, leak barrier and ventilation, not just the field shingles.
- It has to be installed to GAF specification and registered. An enhanced warranty that never got registered is not an enhanced warranty.
Ask any contractor quoting you a GAF roof which specific warranty they’re able to register, and get the answer in writing on the proposal. It’s a fair question and the answer tells you a lot.
What About the Shingles Themselves?
GAF’s residential line runs from basic 3-tab through designer shingles imitating slate and shake, with the Timberline architectural line accounting for most of what actually goes on houses.
The features worth knowing about when you’re comparing quotes:
- Algae protection. GAF’s StainGuard Plus treatment uses copper-containing granules to suppress the blue-green algae that causes black streaking, and carries its own stain warranty term. If your current roof is streaked, specify this on the replacement.
- Wind performance. GAF’s architectural shingles use a wider nailing zone designed to make correct nail placement easier and improve wind resistance, with some systems carrying enhanced wind coverage when the full accessory system is installed.
- Impact rating. Class 4 impact-rated products are available for hail exposure, and that rating is sometimes worth an insurance discount. Worth asking your agent before you choose.
- Color range. GAF publishes a visualizer tool that lets you preview shingle colors on a house before you commit, which is more useful than a sample board in a showroom.
An honest note on brand: within the same tier, GAF and CertainTeed are closely matched, and we install both. The manufacturer you choose is a smaller variable in how long your roof lasts than the ventilation and the installation are.
Why the Installer Outweighs the Shingle
Two identical GAF Timberline roofs, same house design, same street, installed the same month, can be a decade apart in service life. The difference isn’t the product.
It’s whether the nails went into the nailing zone at the specified depth, whether the starter strip went on at the rakes and eaves, whether the old flashing got reused, whether anyone checked the attic ventilation before covering the roof, and whether the valleys and penetrations were detailed properly.
None of that is visible from the ground when the job is finished. All of it decides what happens in year twelve. That’s the entire argument for caring who installs your roof, and it’s the reason manufacturer certification programs exist at all.
Questions Worth Asking Any Roofing Contractor
- Are you currently certified by the manufacturer whose product you’re quoting, and can you show it?
- Which specific warranty will you register on this roof, and is that in the proposal?
- Is this a full system quote, or field shingles with the accessories left out?
- Have you looked at the attic ventilation, and does the quote address it?
- Who carries the workmanship warranty, and for how long?
- Are you licensed and insured in Tennessee, and can I see the certificates?
A contractor who answers all six without hesitating is probably worth hiring. One who gets vague around warranty registration usually isn’t.
Get a Quote From a GAF Certified Contractor
L&L Contractors has installed roofs across Murfreesboro, Nashville, Franklin, Brentwood, Smyrna, Spring Hill and the rest of Middle Tennessee since 2006. We’ll inspect the roof, tell you what it needs, and put the warranty terms in writing with the quote rather than after it.
Call (615) 577-9103 or book a free roof inspection online.
