Composition roll roofing is a flat roofing material made from asphalt, fiberglass, and mineral granules rolled into sheets. It comes in large rolls that cover about 100 square feet per roll. This type of roofing is affordable and easy to install, making it popular for flat or low-slope roofs on sheds, garages, and commercial buildings. Composition roll roofing typically lasts between 15 to 30 years depending on maintenance and climate. According to industry data, asphalt-based roofing systems account for a large share of the U.S. roofing market, with approximately 80% of residential roofing projects using asphalt products.
How Does Composition Roll Roofing Work?
Composition roll roofing works by creating a waterproof barrier across your roof. Roofers unroll the material and secure it with nails, staples, or adhesive. The mineral granules on top protect the asphalt underneath from sun damage and wear.
The material is flexible, which means it can move with temperature changes without cracking. This flexibility is one reason why many contractors choose it for flat roofs that expand and contract with heat.
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What Are the Benefits?
Composition roll roofing costs far less than other roofing materials. According to RubyHome (2025), basic asphalt shingles cost $4.25 to $4.95 per square foot, while flat roofing options like rubber and PVC range from $5.50 to $7.50 per square foot. You can install it quickly without special tools.
It is also lightweight and does not require major structural changes to your building. This saves money on labor and preparation work.
What Is the Lifespan?
Most composition roll roofing lasts 15 to 30 years. According to industry data on roof longevity, modified bitumen, which is a common roll roofing material, typically lasts about 20 years. The exact lifespan depends on three things: how much sun exposure it gets, maintenance habits, and local climate conditions.
In hot climates, the material breaks down faster. Regular maintenance, like clearing debris and checking for damage, helps extend the life of your roof.
How Much Does It Cost?
Installation costs vary by location and roof size. According to RubyHome (2025), roof installation typically costs $4 to $40 per square foot. For a 1,700 square foot roof, expect to pay between $6,800 and $68,000 total, though composition roll roofing falls on the lower end of this range.
| Roofing Material | Cost Per Sq. Ft. | Typical Lifespan |
|---|---|---|
| Composition Roll (Flat) | $5.50-$7.50 | 15-30 years |
| Basic Asphalt Shingles | $4.25-$4.95 | 20 years |
| Architectural Asphalt | $4.50-$8.25 | 30 years |
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If you need help with your roof, reach out to a trusted roof contractor for clear pricing and reliable service.