Texas · Aluminum shingles
Aluminum shingles in Texas
Aluminum shingles are stamped aluminum roofing panels that cannot rust, because there is no steel inside them. Interlock® aluminum shingles interlock on all four sides with the fasteners concealed, are made in North America, and are installed by a certified independent contractor assigned through Metal Roofing Texas.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026
Thickness
0.019 inch to 0.0276 inch
Base-metal aluminum, by profile (ICC-ES ESR-1790).
Weight
About 0.41 to 0.59 lb/sq ft
Installed, by profile (ICC-ES ESR-1790).
Finish
30-year Alunar® coating warranty
70% PVDF coating system (AAMA 2605).
What makes an aluminum shingle different?
An aluminum shingle has no steel inside it, so there is nothing to rust if the finish is scratched or cut. It is a stamped aluminum panel with a baked finish; exposed aluminum forms an oxide film that blocks further oxidation (ASM International). A steel shingle, by contrast, relies on its zinc or aluminum-zinc coating to keep the steel underneath from rusting.
Interlock® aluminum shingles lock to each other on all four sides. The fasteners sit under the course above, out of the weather, so the roof has no exposed screw heads and no rubber washers to age.
Specifications
| Item | Specification |
|---|---|
| Base metal | Aluminum alloy per ASTM B209 (3105-H24 / 3003-H24) |
| Base-metal thickness | 0.019 inch (Slate, Cedar Shingle); 0.0276 inch (Shake, Mediterranean Tile), per ICC-ES ESR-1790 |
| Installed weight | about 0.41 lb per sq ft (Slate, Cedar Shingle), about 0.58 lb per sq ft (Shake), about 0.59 lb per sq ft (Mediterranean Tile), per ICC-ES ESR-1790 |
| Code evaluation | ICC-ES ESR-1790 (International Building Code and International Residential Code) |
| Finish | Alunar® 70% PVDF coating system, designed and tested to meet AAMA 2605; 30-year Alunar® coating warranty |
| Wind | Warranted to 120 mph when installed to manufacturer specification |
| Impact | UL 2218 Class 4, verified by Intertek for Delta Building Products (Slate, Cedar Shingle, Shake and Mediterranean Tile) |
| Fire | Class A Fire Rated Available, as a complete assembly (ASTM E108, over GAF VersaShield® per ICC-ES ESR-2053) |
| Minimum slope | 3/12 |
| Material warranty | Guardian Lifetime Limited Material Warranty: material and finish, original homeowner, transferable once |
| Made | In North America, by Interlock Roofing |
Sources: ICC-ES ESR-1790 (reissued September 2025), the Intertek UL 2218 listing and the manufacturer's technical specifications. Read the full warranty before you sign.
Which profiles are offered here?
Slate, Cedar Shingle, Shake and Mediterranean Tile in Texas. Slate is the most popular; Cedar Shingle and Shake give a wood look without rot or splitting; Mediterranean Tile gives the barrel-tile silhouette without clay to crack. Colors come from the Alunar® range; the installer brings samples to the visit.
In Texas, all four profiles carry a UL 2218 Class 4 impact rating, verified by Intertek for Delta Building Products. Any insurance credit for an impact rating is your carrier's decision; ask them.
Who installs them?
The installer is an independent Texas roofing contractor, certified by the manufacturer on the Interlock® system and assigned to your project, who signs the contract with you and pulls the permit with your city where one is required. Metal Roofing Texas supplies the shingles but does not install them; the material warranty is issued by Interlock Roofing.
Questions, answered
What are aluminum shingles?
Aluminum shingles are roofing panels stamped from aluminum sheet and finished with a baked coating, made to look like slate, cedar shingle, shake or tile. Interlock® aluminum shingles interlock on all four sides with concealed fasteners.
Do aluminum shingles rust?
No. Aluminum forms a thin oxide film that blocks further oxidation, and there is no steel inside an aluminum shingle to rust. That is why they suit homes in salt air.
Are aluminum shingles better than steel shingles?
Aluminum cannot rust and is about one-third the density of steel. Steel shingles usually cost less up front and depend on their zinc or aluminum-zinc coating to keep from rusting. Very large hail can leave a cosmetic mark on any metal roof.
How thick are Interlock aluminum shingles?
0.019 inch (Slate, Cedar Shingle); 0.0276 inch (Shake, Mediterranean Tile) base-metal aluminum, according to ICC-ES Evaluation Report ESR-1790. The alloy meets ASTM B209.
How much do aluminum shingles weigh?
About 0.41 to 0.59 lb per square foot installed, depending on profile (ICC-ES ESR-1790). Natural slate and concrete tile weigh many times that.
Where can I get aluminum shingles installed in Texas?
Request a quote on this site or call the toll-free line. Metal Roofing Texas assigns a certified Interlock installer to your project, who visits, measures and puts a proposal in writing.
Can aluminum shingles be installed over asphalt?
Sometimes, only after inspection: a single layer of asphalt can be roofed over where the deck is sound and local code permits. Cedar shakes, concrete or clay tile and natural slate always come off first.
What colors do aluminum shingles come in?
Colors come from the Alunar® range, with a 30-year Alunar® coating warranty on the finish. The manufacturer's site shows the current chart, and the assigned installer brings samples to the visit so you can judge them against the house.
Sources
- ICC-ES Evaluation Report ESR-1790, Interlock Roofing, reissued September 2025 (PDF)
- UL 2218 Class 4 impact rating, Intertek listing for Delta Building Products (PDF)
- J.R. Davis, "Aluminum and Aluminum Alloys", Alloying: Understanding the Basics, ASM International (2001)
- Guardian Lifetime Limited Material Warranty (full document, PDF)
- Interlock Roofing: aluminum shingles, technical specifications
Product specifications are the manufacturer's (Interlock Roofing). Laws, codes and statistics are as published by the source cited. Reviewed by Scott Plumptree, October 7, 2026.
Get aluminum shingles quoted.
Metal Roofing Texas supplies the roof and assigns a certified Interlock installer for your part of Texas, who visits, measures and gives you a written proposal. Texas issues no state roofing license, so ask the installer for their certificate of insurance and their city registration where your city requires one.
