Roof Warranties Explained: Manufacturer vs Workmanship

Answer First: There Are Two Different Warranties

When you get a new roof, you typically receive two separate warranties that cover different things:

1. The manufacturer's material warranty — covers defects in the roofing materials (shingles, underlayment, accessories). This comes from the company that made the products.
2. The contractor's workmanship warranty — covers the installation labor. This comes from the contractor who installed the roof.

These are not the same thing. A material warranty does not cover installation errors, and a workmanship warranty does not cover material defects. Understanding the difference — and what each actually covers — is essential before you sign a roofing contract.

The Federal Trade Commission (FTC) advises consumers to read warranty terms carefully before purchasing and to understand what is and is not covered. Roofing warranties are no exception.

The Manufacturer's Material Warranty

What It Covers

A manufacturer's material warranty covers defects in the roofing materials themselves — typically the shingles and, in some systems, the underlayment, starter strip, ridge cap, and other components if they are part of the same manufacturer's system. If the shingles are defective and fail prematurely due to a manufacturing defect, the warranty may cover replacement of the defective material.

Limited vs. Lifetime Warranties

Most residential asphalt shingle warranties are described as "limited lifetime" warranties. The word "lifetime" can be misleading:

• "Lifetime" typically means the warranty period for as long as the original homeowner owns the home.** Once the home is sold, the warranty may transfer (with restrictions and a transfer fee) or convert to a shorter non-lifetime term.
• "Limited" means the warranty has specific exclusions and conditions.** It is not a blanket guarantee against any problem.

The Asphalt Roofing Manufacturers Association (ARMA) and individual manufacturers publish the specific terms. Read the actual warranty document, not just the marketing summary.

Prorated vs. Non-Prorated

Many manufacturer warranties are prorated — meaning the coverage decreases over time. A 30-year prorated warranty may cover 100% of material cost in year 1 but only a small percentage by year 25. Some premium warranties are non-prorated for a defined period (e.g., 10–15 years) before converting to prorated coverage.

What Typically Voids a Material Warranty

• Improper installation** — if the shingles are not installed per the manufacturer's published installation instructions, the warranty may be voided. This is why installation quality matters to your warranty, not just to your roof's performance.
• Inadequate attic ventilation** — most manufacturers require proper attic ventilation as a condition of the warranty. A roof installed over an inadequately ventilated attic may not be covered. See our roof ventilation guide.
• Installation over an existing roof** — most manufacturer warranties require installation over a clean deck (a full tear-off), not over existing shingles. See our roof replacement process guide.
• Improper repairs or modifications** — if someone other than a qualified contractor makes improper repairs, the warranty may be voided for the affected area.
• Lack of maintenance** — while manufacturers do not typically require professional maintenance, neglecting obvious problems (like a tree limb puncturing the roof) is not a manufacturing defect.
• Damage from external causes** — storm, hail, wind, fire, and impact damage are not manufacturing defects; they are typically covered by your homeowner's insurance, not the material warranty.

Enhanced / Registered Warranties

Some manufacturers offer enhanced warranties (variously called "system," "certified," or "golden seal" warranties) when:

• A complete system of the manufacturer's products is installed (shingles, underlayment, starter strip, ridge cap, ventilation, flashing)
• The installation is performed by a contractor certified by the manufacturer
• The warranty is registered with the manufacturer within a specific window after installation

These enhanced warranties may include non-prorated coverage, longer terms, or coverage of both materials and labor. They are not automatic — they require specific conditions to be met and registered.

The Contractor's Workmanship Warranty

What It Covers

A workmanship warranty covers the installation labor — if the roof leaks because of an installation error (improper nailing, incorrect flashing, poor sealant), the contractor is responsible for fixing it. This is separate from the material warranty, which covers only the products.

Terms Vary Widely

Workmanship warranty terms are set by the contractor and vary significantly:

• Duration** — ranges from 1–2 years (common for basic workmanship guarantees) to 5–10 years or more for contractors who stand behind their work. Some premium contractors offer longer terms.
• Scope** — some cover only leaks; others cover any installation defect. Read what is actually covered.
• Transferability** — some workmanship warranties are transferable to a new owner; many are not.
• Exclusions** — most exclude damage from storms, improper maintenance, or modifications by others.

Why the Workmanship Warranty Matters

Most roof problems in the first several years are installation-related, not material defects. A manufacturer's warranty will not cover an installation error — only the contractor's workmanship warranty will. This is why the contractor's reputation and warranty terms are as important as the shingle brand.

For how to evaluate a contractor's reliability and warranty, see our choosing a roofing contractor guide.

Questions to Ask Before Signing

1. What manufacturer warranty applies to the materials, and is it the standard or an enhanced warranty?
2. Is the warranty prorated or non-prorated, and for how long?
3. What conditions must be met for the warranty to be valid? (Ventilation, full system installation, certified installer, registration deadline.)
4. Is the warranty transferable if I sell the home, and what are the transfer terms and fees?
5. What workmanship warranty do you provide, for how long, and what does it cover?
6. Is the workmanship warranty transferable?
7. What voids each warranty?
8. How do I register the manufacturer warranty, and what is the deadline?
9. Will I receive written warranty documentation for both the material and workmanship warranties?

A contractor who cannot clearly answer these questions or who provides only verbal assurances is a concern. Get the warranty terms in writing.

Warranty vs. Insurance: Don't Confuse Them

Your homeowner's insurance covers damage from sudden, external events — storms, hail, wind, fire, falling objects. Your material warranty covers manufacturing defects in the products. Your workmanship warranty covers installation errors. These are three separate coverages for three separate categories of problem.

If a storm damages your roof, you file an insurance claim — not a warranty claim. If the shingles fail prematurely due to a manufacturing defect, you file a material warranty claim. If the roof leaks because of an installation error, you file a workmanship warranty claim. For the insurance side, see our how to file a roof insurance claim guide.

A Note on Sources

This guide draws on Asphalt Roofing Manufacturers Association (ARMA) warranty guidance, U.S. Federal Trade Commission (FTC) consumer warranty guidance, and widely published roofing manufacturer warranty terms. Warranty terms vary by manufacturer, product line, and contractor — always read the actual warranty document provided with your installation and confirm the specific terms with your contractor and manufacturer before signing a contract.

Frequently Asked Questions

Cited Research Sources & References