How Long Should a Roofing Warranty Be?

Two roofing bids can look almost the same until you get to the warranty line. One says "lifetime warranty." The other says "10 year workmanship, 50 year manufacturer." Which is better? And is a lifetime warranty really for life?

Roof warranties are confusing because there are really two of them, from two different companies, covering two different things. This guide explains how long a roofing warranty should be, the difference between a workmanship warranty on a roof and a manufacturer warranty on shingles, and the red flags to catch before you sign.

What are the two kinds of roofing warranty?

• Manufacturer warranty. Comes from the shingle or membrane maker, such as GAF, Owens Corning or CertainTeed. It covers defects in the materials.
• Workmanship warranty. Comes from the roofer. It covers installation mistakes, such as bad flashing, wrong nailing or missed underlayment.

Most roof leaks in the first years come from installation, not from defective shingles. That makes the workmanship warranty on a roof the one you are most likely to use.

How long is a manufacturer warranty on shingles?

Most architectural shingles from the major brands now carry a "limited lifetime" warranty for the original owner of a single-family home. The word that matters is limited. Typically:

• Full coverage, for materials and often labor, lasts only for an early period, commonly about 10 years. CertainTeed calls this SureStart, and GAF and Owens Corning have similar periods.
• After that, coverage is usually prorated, so it pays less each year and may cover materials only.
• Transfer to a new owner is often limited to one transfer and may shorten the coverage.
• Wind and algae coverage are separate and usually shorter.

Upgraded system warranties change the picture. When a certified roofer installs a full system, the manufacturer can extend non-prorated coverage for decades. CertainTeed's SureStart PLUS, for example, extends full coverage up to 50 years on single-family homes. Our guide to roofing manufacturer certifications explains which roofers can offer these.

How long should a workmanship warranty on a roof be?

There is no legal minimum in California, so roofers set their own terms. As a rough guide from the industry:

Workmanship warranty	What it suggests
1 to 2 years	Below what most established roofers offer on a full replacement
5 years	A common baseline for a re-roof
10 years	A strong roofer backed warranty
15 to 30 years	Usually a manufacturer backed system warranty, such as GAF Golden Pledge or CertainTeed 5-STAR

CertainTeed itself notes that contractor workmanship warranties typically run one to five years, and that the roofer's intent and ability to stand behind the work matter more than the number. A 10 year warranty from a company that disappears in two years is worth nothing.

Source: CertainTeed, Roofing 101: Worry-free Warranties and SureStart PLUS chart (2026); GAF Golden Pledge warranty terms

Why is a manufacturer backed workmanship warranty different?

With a standard workmanship warranty, only the roofer stands behind the installation. If they go out of business, your coverage goes with them. With a manufacturer backed system warranty, such as GAF Golden Pledge, Owens Corning Platinum Protection or CertainTeed SureStart PLUS 5-STAR, the manufacturer covers workmanship too, for the stated term. That is why these warranties are worth real money, and why only top tier certified roofers can offer them.

If you are comparing brands, our guide to GAF vs Owens Corning vs CertainTeed covers the shingle lines behind each warranty.

What does California law add?

Separate from any written warranty, California law gives homeowners time to act on construction defects. Hidden, or latent, defects can generally be pursued for up to 10 years after the work is substantially complete. That is not a warranty and it often means a lawsuit, so a clear written warranty is still far better. If a roofer refuses to fix a problem, our guide on what to do if a roofer does a bad job covers CSLB complaints and bond claims.

What can void a roofing warranty?

• Not registering it. Many system warranties must be registered within a set time after installation. Ask the roofer to register it and send you the certificate.
• Mixing products. System warranties often require the brand's own underlayment, starter, hip and ridge and ventilation.
• Other trades on the roof. Solar or satellite installs that puncture the roof can void coverage in that area unless done properly.
• Poor ventilation. Manufacturers can deny claims when attic ventilation does not meet their requirements.
• Neglect. Ignoring obvious damage or skipping basic upkeep.

What are the red flags in a roofing warranty?

• "Lifetime warranty" with no document showing what it covers.
• A workmanship warranty that is verbal only or missing from the contract.
• A system warranty promised by a roofer who does not appear on the manufacturer's locator.
• Warranty contingent on paying in cash or skipping the permit.
• A company too new to have been around for its own warranty term, with no backing.

How do you protect your roof warranty before you sign?

Put both warranties in the contract by name and length. Check that the roofer holds an active California contractor license with the C-39 classification from CSLB, and that they are licensed and insured. Our guide on what should be in a roofing contract in California covers the rest of the paperwork.

A ConFacts report shows how long the roofer has been licensed, their CSLB history, bond, workers' comp and whether claimed certifications can be verified, all in a 0 to 100 Trust Score. We never take money from contractors, so it is a fair way to judge whether a roofer will be around to honor the warranty.

Frequently asked questions

Is a lifetime roof warranty really for life?

Usually it means as long as the original owner owns the home, with full coverage only in the early years and prorated coverage after.

What is a good workmanship warranty for a new roof?

Five to ten years from the roofer is solid. Longer coverage usually comes from a manufacturer backed system warranty.

Does a roofing warranty transfer when I sell?

Many do, once, with limits. Check the transfer rules and any fee or notice deadline.

Who do I call first if my new roof leaks?

Call the roofer first, in writing, since most early leaks are workmanship issues.

Does a repair come with a warranty?

Often a short one, if any. Ask for it in writing before the work starts.