North Carolina · Roof warranties explained
Metal roof warranties, explained
A roof usually carries three warranties: material (from 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's excluded, and how it transfers. On an Interlock roof in North Carolina, the Guardian Lifetime Limited Material Warranty covers material and finish, and the Metal Roof NC 5-Year Labor Warranty covers the installation.
By Metal Roof NC · Updated October 17, 2026
Material
Guardian Lifetime Limited Material Warranty
From Interlock Roofing; original purchaser; transfers once.
Finish
30-year Alunar® coating warranty
On the factory finish.
Workmanship
Metal Roof NC 5-Year Labor Warranty
Workmanship, five years. Full terms in writing with the contract.
What warranties come with a metal roof?
Material
Covers the roofing product itself against defects. Issued by the manufacturer, or sometimes by the contractor reselling it. Read who the warrantor is: a manufacturer's warranty stands even if the contractor stops trading.
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 does a "50-year" or "lifetime" roof warranty really mean?
The number of years on a brochure tells you the longest possible term, not what you'll be paid in year 30, and a "lifetime" warranty is usually limited to the original owner. 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: severe weather, cosmetic dents, coastal or industrial exposure, foot traffic, condensation?
- How, and how quickly, must a claim be made?
Which warranties come with an Interlock roof in North Carolina?
| Guardian Lifetime Limited Material Warranty | Metal Roof NC 5-Year Labor Warranty | |
|---|---|---|
| Issued by | Interlock Roofing, the manufacturer | Metal Roof NC (Everlast Improvements LLC), the installer and an authorized Interlock dealer |
| 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 | Workmanship of the installation |
| How long | For the original purchaser while they own the home | Five years |
| 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 | Terms provided in writing with your contract |
| Report a problem | In writing to guardian@interlockroofing.com, within 30 days of the issue becoming known | Contact Metal Roof NC; terms provided in writing with your contract |
| Exclusions to know | Workmanship; severe weather events and Acts of God; hail damage other than the stated hail coverage; condensation; normal wear including minor scratches and dents | Terms provided in writing with your contract |
Guardian terms are summarized from the manufacturer's warranty document. The full terms of the Metal Roof NC 5-Year Labor Warranty are provided in writing with the contract. Read both documents before you sign.
Where do I see the warranties before I sign?
The Guardian warranty is published as a PDF on this site, and both warranties are summarized side by side on the warranty page. Ask for the labor warranty in writing with your estimate, and read the exclusions of both before you sign. Ready to compare? Request an estimate, or read how to choose a metal roofing contractor in NC first.
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 original purchaser while they own the home. It transfers once, to the next registered owner, with coverage to 50 years from substantial completion. The Alunar® coating is warranted 30 years. Workmanship is excluded.
Who stands behind the installation?
Metal Roof NC does, with the Metal Roof NC 5-Year Labor Warranty, which covers workmanship for five years. The full terms are provided in writing with the 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. For the labor warranty, see the written terms provided with your contract.
Does a roof warranty cover hurricane damage?
Not the Guardian warranty: it excludes severe weather events. Storm damage is a homeowners-insurance matter. Keep your installation documents and photos for your insurer.
How do I make a warranty claim?
Material and finish: in writing to guardian@interlockroofing.com within 30 days of the issue becoming known. Workmanship: contact Metal Roof NC at (984) 289-2585. If you're not sure which applies, call us first.
Sources
- Guardian Lifetime Limited Material Warranty (full document, PDF)
- Metal Roof NC 5-Year Labor Warranty
- Both warranties side by side
Product specifications are the manufacturer's (Interlock Roofing). Weather and code facts are from the public agencies listed. Published by Metal Roof NC (Everlast Improvements LLC), updated October 17, 2026.
Related guides
- Aluminum roofing in North Carolina
- Interlock roofing in North Carolina
- Hurricane-resistant roofing in NC
- Metal shingles: a buyer’s guide
- Aluminum shingles
- Steel vs aluminum roofing
- Metal roof vs asphalt shingles
- Metal roof cost in North Carolina
- Warranties side by side
- Choosing a contractor
- Service areas
- Raleigh
- Durham
- Charlotte
- Greensboro
- Wilmington
- Request an estimate
Where we install in North Carolina
Metal Roof NC installs Interlock® aluminum roofs across the Triangle, the Charlotte area, the Triad and Piedmont, and the coast. See every service area.
Charlotte area
Triad and Piedmont
Read the warranties with us.
A project-specific estimate before work begins, from Metal Roof NC, an authorized Interlock aluminum roofing dealer. 5301 Hillsborough St, Raleigh, NC 27606