Texas · Roof warranties explained
Metal roof warranties, explained
A roof usually carries three warranties: material (issued by the manufacturer), finish, and workmanship (from the installer). The number of years matters less than who the warrantor is, whether coverage shrinks over time, what is excluded, and how it transfers. On an Interlock® roof, the Guardian Lifetime Limited Material Warranty covers the material and finish, and the installer who contracts with you gives the workmanship warranty.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026
Material
Guardian Lifetime Limited Material Warranty
Issued by Interlock Roofing; the original purchaser while they own the home; transfers once.
Finish
30 years on the Alunar® coating
Chalking and fading, measured against stated limits.
Workmanship
From your installer
Given by the Texas installer who contracts with you; written into their contract.
A roof usually carries three different warranties
Material
Covers the roofing product itself against defects. Issued by the manufacturer, or sometimes by a contractor reselling it. Read who the warrantor is: a manufacturer's warranty stands on its own, whoever installed the roof.
Finish (coating)
Covers the paint: usually chalking, fading and peeling, measured against stated limits. It is often a separate section with its own term.
Workmanship
Covers the installation: flashing, fastening, details. Only the installer can issue it, and most material warranties exclude workmanship entirely.
Wind and other ratings
Wind coverage, fire ratings and impact ratings usually depend on the roof being installed to the manufacturer's specification. Ask what installation the rating assumes.
What a "50-year" warranty can mean
A number of years on a roofing brochure tells you the longest possible term, not what you will be paid in year 30. Before you compare warranties, find the answers to these in the warranty document itself, not the sales sheet.
- Is coverage reduced over time (pro-rated)? If so, how much is left at year 10, 20 and 30?
- Does it cover material only, or labor to replace the material too?
- Who is the warrantor, and where is it based?
- Does it transfer when you sell, how many times, and is there a fee or a deadline to register the transfer?
- What is excluded: ice damming, cosmetic dents, coastal or industrial exposure, foot traffic?
- How, and how quickly, must a claim be made?
The warranties on an Interlock® roof in Texas
| Guardian Lifetime Limited Material Warranty | Workmanship warranty | |
|---|---|---|
| Issued by | Interlock Roofing, the manufacturer | The installer named on your contract |
| Covers | The aluminum roofing material against manufacturing defects (including splitting, cracking and perforation from hailstones 1.5 inches in diameter or less), and the Alunar® finish against chalking and fading beyond stated limits for 30 years | The installation, as the installer's contract states |
| How long | For the life of the original purchaser while they remain the registered owner of the home | As the installer's contract states |
| Takes effect | Once the installation contract is paid in full | As the installer's contract states |
| Transfer | Once, to the next registered owner, with coverage to 50 years from substantial completion; proof of purchase within 60 days of the sale and a $300 transfer fee | As the installer's contract states |
| Report a problem | In writing to guardian@interlockroofing.com, within 30 days of the issue becoming known | To the installer, as their contract states |
| Exclusions to know | Workmanship; severe weather and Acts of God; hail damage other than the stated hail coverage; condensation; ice damming; ice and snow shedding; normal wear including minor scratches and dents | Ask for the list in writing |
Material column summarized from the Guardian warranty document. Metal Roofing Texas does not install roofs and does not warrant the installation. Read the full documents before you sign.
What to ask the installer about workmanship
Texas issues no state roofing license, so the installer's written contract and their written workmanship warranty are what you rely on. Get both before any work begins.
- The workmanship warranty in writing: how long, what it covers, whether it transfers
- A certificate of insurance, and the installer's registration with your city where the city requires one
- References from recent roofs
- Who to call about a workmanship issue, and how quickly to report it
Questions, answered
What does a 50-year limited roof warranty cover?
It depends entirely on the document. Many 50-year roofing warranties cover the material only, reduce coverage over time, and exclude workmanship. Check whether it is pro-rated, whether labor to replace material is included, who the warrantor is, and how it transfers.
What does the Guardian Lifetime Limited Material Warranty cover?
The aluminum roofing material and its factory finish, for the life of the original purchaser while they own the home. It transfers once, to the next registered owner, with coverage to 50 years from substantial completion. Workmanship is excluded, and ice damming is a stated exclusion.
Who stands behind the installation?
The installer who contracts with you. Metal Roofing Texas does not install roofs and does not warrant the installation; the certified Interlock installer assigned to your project gives their own workmanship terms. Texas issues no state roofing license, so get the workmanship terms in writing in the installer's contract.
Is a metal roof warranty transferable when I sell?
The Guardian material warranty transfers once, to the next registered owner, with coverage to 50 years from substantial completion. The new owner sends proof of purchase to the manufacturer within 60 days of the sale with a $300 transfer fee. Whether the installer's workmanship warranty transfers depends on their contract.
Does the warranty cover ice dams?
No. Ice damming is a stated exclusion of the Guardian material warranty. Ice dams come from heat loss into the attic and from ventilation, not from the roof covering.
How do I make a warranty claim?
Material and finish: in writing to guardian@interlockroofing.com within 30 days of the issue becoming known, with your certificate number, a description and photographs. Workmanship: to the installer named on your contract.
Sources
Warranty terms are the manufacturer's (Interlock Roofing). Reviewed by Scott Plumptree, October 7, 2026.
Read both warranties before you sign.
Request a quote and a certified Interlock installer is assigned to your project. Ask them to put their workmanship terms in writing, next to the manufacturer's warranty.
Metal Roofing Texas is operated by Interlock Roofing of America, which is not a contractor and does not install roofs; installation is performed by independent, manufacturer-certified Texas installers who contract directly with you. Texas issues no state roofing license: ask any contractor for their certificate of insurance and city registration.
