What are architectural shingles?

Architectural shingles, also called dimensional or laminated shingles, consist of two or more layers of asphalt-fiberglass material bonded together to create a thicker, more textured appearance. Unlike traditional 3-tab shingles, which are uniform flat pieces cut into three tabs, architectural shingles feature an uneven profile that mimics the look of wood shake, slate, or cedar shake roofing.

The key structural difference lies in thickness and weight. Architectural shingles typically measure 3/8 to 5/8 inches thick and weigh 50 to 80 pounds per square (100 square feet), compared to 1/4 inch and 60 to 70 pounds for 3-tab varieties. This added mass and layering improve wind resistance, with most architectural shingles rated for 110 to 150 mph wind speeds, versus 60 to 90 mph for 3-tab products. Building codes in Ontario often favor architectural shingles for this reason.

Lifespan also benefits from the construction method. Architectural shingles typically last 20 to 30 years under standard conditions, whereas 3-tab shingles generally last 15 to 20 years. The extra material and layered design slow granule loss and weathering. However, actual longevity depends on climate, installation quality, ventilation, and maintenance. Contractors installing architectural shingles must ensure proper roof decking preparation and fastening, as the heavier material places greater demands on the substrate.

Property owners considering a roof replacement often choose architectural shingles for aesthetic appeal and durability. Find qualified roof replacement and installation providers in your area to assess your home's suitability and discuss shingle options.