Architectural vs 3-Tab vs Designer Shingles
3-tab shingles are single-layer strips cut into tabs, so the roof looks flat and even. Architectural shingles, also called laminated or dimensional, are two or more layers glued together, thicker and with a shadowed, uneven look. Designer shingles are heavier multi-layer products made to look like wood shake or slate. The differences go beyond looks: in Owens Corning's current warranty, its 3-tab line carries a 25-year warranty with a 60 mph wind warranty, while its architectural and designer lines carry limited lifetime warranties with wind warranties of 110 to 130 mph, and up to 160 mph for one architectural line installed to its enhanced specification. In Los Angeles, three rules apply whichever you choose: a Class A rating where the fire zone calls for it, a cool-rated color on most re-roofs, and, in most cases, a permit.
This page compares the three types of asphalt shingle. It doesn't rank brands or give prices; the Owens Corning figures are one manufacturer's, used because its warranty puts all three types in one table, and other makers' lines differ. How shingles compare with tile, metal and other roofing is in the best roofing materials for Southern California.
How they're built
The Asphalt Roofing Manufacturers Association (ARMA) describes asphalt shingles as made in three forms: strip shingles, which are one piece; laminated shingles, which are multi-layer; and large individual shingles. A 3-tab is a strip shingle: a rectangle with cutouts along its length that split it into tabs, so each strip looks like three smaller shingles on the roof. A laminated shingle is made by slitting the shingle sheet into ribbons and recombining them into two or more layers, held together by adhesive. That extra layer is what gives architectural shingles their thickness and their shadow lines, and with staggered edges and embossing it's how designer lines imitate tile, wood or slate.
The three side by side
The table puts ARMA's typical figures next to one manufacturer's current lines of each type. Shingles per square and bundles per square tell you how much material goes into the same 100 square feet of roof.
| 3-tab (strip) | Architectural (laminated) | Designer (shake or slate look) | |
|---|---|---|---|
| Build | One layer, cut into tabs | Two or more layers glued together | Thicker multi-layer shingle |
| Look | Flat and uniform | Dimensional, with shadow lines | Imitates wood shake or slate |
| Typical shingles per square (ARMA) | 48 to 81 | 64 to 90 | Not listed separately |
| Owens Corning example | Supreme: 3 bundles, 65 shingles per square | Oakridge and Duration: 3 bundles, 64 shingles per square | Woodcrest and Woodmoor: 6 bundles, 90 shingles, 345 and 465 pounds per square |
| Warranty length (Owens Corning) | 25 years | Limited lifetime | Limited lifetime |
| Full-coverage period (TruPROtection) | 5 years | 10 years | 10 years |
| Wind warranty | 60 mph | Oakridge 110 mph, or 130 mph with six nails and starter shingles; Duration 130 mph, 160 mph enhanced | 130 mph |
The Owens Corning terms are from its standard limited warranty for shingles bought after August 1, 2026, and the product figures from its product pages as of October 2026. A warranty's length isn't a prediction of how long the roof will last; what each part of a shingle warranty actually pays for is in roofing warranties explained. How the flagship architectural lines of four brands compare is in GAF vs Owens Corning vs CertainTeed vs Malarkey.
Wind: what the code asks and what the warranty adds
California's residential code requires asphalt shingles to meet ASTM D3462, to be tested for wind resistance under ASTM D7158, and to carry on the package a wind classification that matches the design wind speed where the house is (CRC R905.2.4 and R905.2.4.1). A shingle installed to the code carries the class required for its site; the wind warranty is what the manufacturer adds on top. The Oakridge line shows how much installation matters: Owens Corning's 110 mph wind warranty is the standard with four nails per shingle, and 130 mph applies only with six nails and its starter shingles along the eaves and rakes. The code's own minimum is four fasteners per strip shingle, or the manufacturer's instructions where they ask for more (CRC R905.2.6). What the D3161 and D7158 classes measure, and how they compare with Santa Ana gusts, is in shingle wind and impact ratings.
What applies to all three in Los Angeles
Fire rating. ARMA notes that most asphalt fiberglass roofing products made in North America carry a Class A fire rating, the highest. In a Very High Fire Hazard Severity Zone, Class A is required, so check the rating on the product you're quoted, as covered in the Class A roof rating.
Cool-roof color. Replacing more than half of a roof triggers California's cool-roof requirement in most of Los Angeles's climate zones, and that limits colors in every type. On our 2024 re-roof in Canoga Park, not one gray in the first shingle line we priced cleared the threshold; a cool-rated line made in gray did. The rule and its exceptions are in the cool-roof requirement on a re-roof, and how to read a shingle color's rating in CRRC cool roof ratings.
Weight and the permit. Designer shingles are heavier: in Owens Corning's range, Woodcrest is 345 pounds per square and Woodmoor 465. That's still under the 6 pounds per square foot that the City of Los Angeles's express re-roof permit allows for a Class A or B covering (Woodmoor works out to 4.65 pounds per square foot), but the roof structure has to be able to carry whatever goes on it (CRC R908.2). How the permit works is in getting a roof permit in the City of Los Angeles.
The next re-roof. ARMA notes that most manufacturers don't recommend installing new shingles over laminated ones, so an architectural or designer roof will normally be torn off, not covered over, when its time comes.
Solar. All three are composition shingle roofs for solar purposes; what a solar installation changes on a shingle roof is covered in solar on composition shingle roofs.
Which to choose
- Architectural is what our recent re-roofs have used: on a 2023 job in North Hollywood, 18 squares of architectural shingle went on new OSB sheathing. It's the middle of the range on look, wind warranty and full-coverage years.
- Designer buys a look. On our 2025 re-roof in Woodland Hills, a standard architectural shingle and a premium triple-laminate shake-look shingle, both cool-rated, were priced side by side; the premium one cost more, came in fewer colors and had a longer lead time, and the difference between them was appearance and delivery date rather than performance.
- 3-tab gives up the dimensional look, years of full coverage and wind warranty in Owens Corning's terms. It can make sense where those matter less, such as a detached garage, or where a small section has to match an existing 3-tab roof.
Whichever you're weighing, ask for the lines priced side by side on your own roof, with the same scope, so the difference you compare is the shingle and not the job; how to put bids on the same footing is in price per square vs price per square foot.
Frequently asked
What's the difference between 3-tab and architectural shingles?
Are architectural shingles worth it over 3-tab?
Do architectural shingles last longer than 3-tab?
Are 3-tab shingles still made?
What are designer shingles?
Can new shingles go over old 3-tab shingles?
Related reading
Sources & methodology
Code sections, rules and figures on this page come from the primary sources below. Codes, local requirements and product terms change; each was verified October 8, 2026.
- Asphalt Roofing Manufacturers Association, Residential Asphalt Roofing Manual: Design and Application Methods, 2014 edition (Chapter 1, Table 1;…
- California Residential Code 2025, Chapter 9, Roof Assemblies (R905.2.4, R905.2.4.1, R905.2.6, R908.2, R908.4)
- Owens Corning, Standard Product Limited Lifetime Warranty (shingles purchased after August 1, 2026), Limited Lifetime Warranty Information Table
- Owens Corning, Supreme 3-tab shingles (product page)
- Owens Corning, TruDefinition Oakridge shingles (product page)
- Owens Corning, TruDefinition Duration shingles (product page)
- Owens Corning, Woodcrest and Woodmoor shingles (product pages)
- LADBS, Express Permits (No Plan Check Required), Information Bulletin P/GI 2026-003, revised June 10, 2026
We price your roof in more than one shingle line, side by side
Call (323) 844-7777. We measure the roof and price it in more than one shingle line, cool-rated colors included, so you can compare the look, the warranty and the lead time on your own house. Have ready the address, a photo of the house from the street and any color you have in mind.
Prepared by Cali Energy, October 8, 2026. This article is for general educational purposes only and is not legal, tax, financial, engineering, or utility advice. Rates, incentives, codes, permit requirements, equipment specifications, prices, and program terms may change; figures and timelines are estimates, not guarantees. Confirm current requirements with the applicable utility, AHJ, program administrator, manufacturer, or a licensed professional. See our Content Disclaimer. Cali Energy · 19201 Parthenia St, Unit E, Northridge, CA 91324 · CSLB #1032379 (B, C-10, C-39)