Warranty: What's Covered, What's Not, and Why "Lifetime" Doesn't Mean What You Think

Proof Construction Workmanship Guarantee

Every roof we install comes with a 5-Year Workmanship Guarantee — no pro-rating, no depreciation schedule, no hidden deductibles. If a leak appears due to our installation methods within 5 years, we fix it. Free. Period.

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Manufacturer Warranty Comparison

Here's what GAF, Owens Corning, and CertainTeed actually cover in Oklahoma's climate. The "lifetime" label is deceptive — read the pro-rating schedule.

Feature	GAF Timberline HDZ	Owens Corning Duration	CertainTeed Landmark
Non-Prorated Period	10 years	10 years	5 years
Total Coverage (Labor + Materials)	50 years*	50 years*	50 years*
Wind Speed Coverage	130 mph	130 mph	110 mph
Algae Resistance	15 years	10 years	15 years
Smudge/Streak Protection	Limited	StainGuard®	None
Transferable	Yes	Yes	Yes
OK Climate Rating	Excellent	Excellent	Good
Proof Construction Preferred	✓	✓	Available

* "50-year" means the warranty duration, not a guarantee the roof lasts 50 years. Pro-rated after the non-prorated period — payout decreases annually.

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What Most Roofers Don't Tell You About Warranties

1. "Lifetime" is marketing, not engineering. Manufacturer "lifetime" warranties run 30-50 years in the fine print — and after the non-prorated period (usually 5-10 years), coverage depreciates. Year 20 on a "lifetime" warranty might pay 10% of replacement cost.

2. Workmanship warranties are only as good as the contractor. If the roofer goes out of business, their workmanship warranty is worthless. Proof Construction has been Tulsa-based since 2019 with a 4.9/5 rating and BBB accreditation.

3. Ventilation voids everything. Most manufacturer warranties require 1:300 attic ventilation. If your attic doesn't meet spec, the manufacturer can deny any shingle defect claim — even if the defect is clearly manufacturing-related. We verify your ventilation before installation.

4. Registration deadlines are real. GAF requires online registration within 90 days of installation. Owens Corning within 180 days. Miss the window, and your warranty drops from 50 years to 20 years. We register every roof we install and provide you with confirmation.

5. Insurance-backed vs. contractor-backed. GAF's Golden Pledge warranty is backed by GAF's insurance — if the contractor goes belly-up, GAF still covers the workmanship. Standard warranties are contractor-backed (worthless if the roofer closes). We offer both tiers.