Roof Warranty Guide: What’s Covered & What’s Not

A roof warranty sounds straightforward until you need to use it. Then you discover the manufacturer warranty does not cover installation errors. The workmanship warranty expired after 2 years. The “lifetime” warranty is prorated after year 10 and only covers 15% of the replacement cost. And the warranty was voided because you had a satellite dish installed without following specific mounting procedures. Understanding what your roof warranty actually covers — and what it does not — is essential before you spend $10,000 to $40,000 on a new roof.

This guide explains every type of roof warranty, breaks down the GAF warranty tiers (the most common in the Myrtle Beach market), clarifies the difference between prorated and non-prorated coverage, and lists everything that can void your warranty.

Two Warranties You Need: Manufacturer + Workmanship

Every new roof should come with two separate warranties. They cover different things and come from different sources.

Manufacturer Warranty

This warranty is issued by the company that made the roofing material (GAF, Owens Corning, CertainTeed, Atlas, etc.). It covers defects in the material itself: premature granule loss, cracking, curling, splitting, or delamination that results from a manufacturing problem. If a shingle fails because it was made with defective asphalt or the fiberglass mat was flawed, the manufacturer warranty covers replacement materials. Standard manufacturer warranties run 25 to 50 years depending on the product, but the coverage amount is often prorated after the first 10 years.

Workmanship Warranty

This warranty is issued by your roofing contractor. It covers installation errors: leaks caused by improper nailing, incorrect flashing, missed underlayment, inadequate sealing, or any other mistake made during installation. If your roof leaks because the contractor missed a step, the workmanship warranty covers the repair at no cost to you. Standard workmanship warranties range from 2 to 25 years depending on the contractor and the warranty tier.

GAF Warranty Tiers Explained

GAF is the most installed shingle brand in the Myrtle Beach area. Their warranty system has four tiers that depend on the contractor’s certification level and how many GAF products are used in the installation.

Why GAF-Backed Workmanship Matters

With a System Plus, Silver Pledge, or Golden Pledge warranty, GAF stands behind the workmanship coverage — not just the contractor. If your contractor goes out of business in year 5, GAF will still honor the workmanship portion of the warranty. This is a significant advantage over a contractor-only workmanship warranty, which dies with the company.

Prorated vs Non-Prorated: Why It Matters

This is where most homeowners get surprised during a warranty claim.

Prorated Warranty Example

A 30-year prorated warranty on a shingle that cost $100 per bundle might cover: 100% for years 1 through 10, then decrease by about 4% per year after that. In year 20, the warranty covers roughly 60% of the material cost. In year 25, it covers about 40%. By year 28, you might get 12 to 15% of the replacement material cost. And none of these prorated warranties cover labor — you pay full price for installation even if the materials are partially covered.

Non-Prorated Warranty Example

A GAF Silver Pledge 50-year non-prorated warranty covers 100% of the material cost for the full 50 years. A claim in year 30 pays the same as a claim in year 3. This is dramatically more valuable than a prorated warranty. The enhanced GAF warranties (System Plus, Silver Pledge, Golden Pledge) also cover the cost of labor for tear-off and reinstallation during certain periods, which can save thousands of dollars on a claim.

What Voids a Roof Warranty

Both manufacturer and workmanship warranties have conditions that can void coverage. Know these before you do anything to your roof.

Actions That Void Most Warranties

• Improper ventilation — Inadequate attic ventilation causes heat and moisture buildup that damages shingles from below. Most manufacturers require balanced intake and exhaust ventilation meeting IRC standards. An improperly ventilated attic is the number one cause of warranty claim denials.
• Pressure washing — Power washing strips granules from shingles, accelerating wear. Use low-pressure chemical cleaning for algae or moss instead. Our algae cleaning guide covers the correct method.
• Unauthorized roof penetrations — Installing satellite dishes, solar panels, antennas, or other equipment without following the manufacturer’s penetration guidelines can void the warranty in the affected area.
• Layering shingles — Installing new shingles over old ones without manufacturer approval. While building code may allow two layers, many manufacturers void the warranty on layered installations.
• Neglected maintenance — Allowing excessive debris accumulation, failing to clean gutters (causing water backup), or ignoring obvious damage are all grounds for denial.
• Unlicensed repairs — Having an unlicensed person make repairs can void both manufacturer and workmanship warranties.
• Non-compatible materials — Using a different manufacturer’s accessories (ridge caps, starter strips, underlayment) when the warranty requires a full system from one manufacturer.

What Warranties Do NOT Cover

• Storm damage — Wind, hail, fallen trees, and hurricane damage are insurance claims, not warranty claims
• Normal wear and tear — Gradual aging is expected and not a defect
• Color changes — Fading, staining from algae, or moss growth are not material defects (some products carry separate algae warranties)
• Damage from foot traffic — Walking on the roof can crack or displace shingles
• Settling or structural movement — If your home’s structure shifts and damages the roof, this is not a roofing defect
• Consequential damages — Most warranties do not cover interior water damage, mold, or personal property damage resulting from a roof failure
• Acts of God — Earthquakes, tornadoes, and other catastrophic events

How to Read the Fine Print

Before signing a roofing contract, request a copy of both the manufacturer warranty document and the contractor’s workmanship warranty. Look for these specific details:

• Coverage period — Exact start and end dates. “Lifetime” typically means 50 years from installation, not the life of the homeowner.
• Prorated vs non-prorated — When proration starts and the rate of decrease
• What is covered — Materials only? Materials and labor? Tear-off and disposal?
• Claim filing requirements — Timeframes for reporting defects, required documentation
• Transferability — Can the warranty transfer to a new owner? What is the process?
• Maintenance requirements — What maintenance must be performed to keep the warranty valid?
• Exclusions — The complete list of what is not covered
• Dispute resolution — How disagreements are handled (arbitration, mediation, litigation)

Warranty Tips for Myrtle Beach Homeowners

• Choose a GAF Certified or Master Elite contractor for enhanced warranty tiers. Our contractor selection guide explains the certification levels.
• Keep all documentation — Contract, warranty certificates, receipts, and permit records in a safe, accessible location
• Schedule annual roof inspections — Documented maintenance supports warranty claims
• Do not let anyone walk on your roof without good reason — Foot traffic damages shingles
• Use the same manufacturer for all accessories — Mixing brands can void system warranties
• Ensure proper attic ventilation at installation — A good contractor will verify ventilation as part of the roof replacement project

Frequently Asked Questions

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