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GAF Certified.

Spartan Roofing is a GAF Certified contractor — factory-trained on the largest roofing manufacturer in North America. That means proven materials, verified installation standards, and stronger warranties for every Central NJ homeowner we serve.

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Why It Matters

What GAF Certification means for you.

VERIFIED

Vetted & Insured

GAF independently verifies our license, insurance, and workmanship before granting certification — and audits us regularly.

TRAINED

Factory-Trained Crews

Our installers go through GAF's certified training programs. Proper installation = the warranties actually pay out.

SYSTEM

Full Roof System

We install GAF's complete roofing system — shingles, underlayment, ice & water shield, ridge ventilation, starter, and accessories.

WARRANTY

Stronger Warranties

Certified contractors can offer GAF's enhanced warranty packages — material and workmanship coverage you don't get from non-certified installers.

LOCAL

Local Reputation

GAF tracks customer feedback. Certification requires consistently strong reviews from verified homeowners.

PEACE

Peace of Mind

If anything ever goes wrong, you have a national manufacturer standing behind us — not just a small local business.

Warranty Coverage

What's Backed.

As a GAF Certified contractor, every system we install is eligible for GAF's enhanced warranty package — covering both materials and our workmanship for decades.

50-year limited material warranty
Enhanced workmanship coverage
GAF Timberline HDZ shingles standard
StainGuard Plus algae resistance
LayerLock technology for stronger nail zones
Transferable to a new homeowner
Full GAF Lifetime Roofing System (underlayment, ridge, starter, accessories)
StreakGuard algae warranty

Our Work

GAF systems in the field.

Recent GAF Timberline HDZ installs across Central New Jersey.

FIG. 01GAF Timberline HDZ · drone view.

FIG. 02Architectural shingle aerial.

FIG. 03Finished install · curb view.

Common Questions

Quick Answers.

GAF (the largest roofing manufacturer in North America) verifies a contractor's licensing, insurance, training, and customer feedback before granting certification. Certified contractors are factory-trained to install GAF's roofing systems correctly — which is what unlocks the enhanced warranty coverage.

No — being GAF Certified costs Spartan Roofing more (training, audits, insurance), but the warranty coverage is included with every GAF system we install. You get a stronger warranty at no premium.

You only get the basic limited material warranty — no enhanced workmanship coverage from GAF. If something fails due to install error, you're back to dealing with whoever installed it (assuming they're still in business).