Bituminous roofing is a type of roof made from bitumen, a dark sticky material that holds layers together. It’s also called asphalt roofing or built-up roofing. Bituminous roofs are strong, affordable, and used on many homes and buildings. They come in two main forms: built-up roofing (BUR) and asphalt shingles. According to industry data, asphalt shingles account for nearly 80% of roofing projects in the U.S. These roofs last about 20 to 30 years, making them a popular choice for homeowners.
How Long Does Bituminous Roofing Last?
Bituminous roofs typically last between 20 and 30 years. According to RubyHome (2025), asphalt shingles have a lifespan of 20 years for basic three-tab shingles and up to 30 years for architectural shingles. Some roofs last longer if you care for them well.
The age of your roof matters for insurance and repairs. According to RubyHome (2025), the average age of roofs being replaced is just over 19 years. Proper maintenance like cleaning gutters and removing debris can help your bituminous roof stay strong longer.
What Does Bituminous Roofing Cost?
Bituminous roofing is one of the cheapest roof options. According to RubyHome (2025), basic asphalt shingles cost $4.25 to $4.95 per square foot, while architectural asphalt shingles cost $4.50 to $8.25 per square foot.
For a full roof replacement, costs vary. According to RubyHome (2025), the average roof replacement cost is $9,526, with a range of $5,868 to $13,217. Installation costs range from $4 to $40 per square foot depending on materials and labor.
Why Do Homeowners Choose Bituminous Roofing?
Homeowners pick bituminous roofing for three main reasons. According to RubyHome (2025), 33% of homeowners replace roofs due to leaking, 33% replace them after storm damage, and 25% replace them when they expect failure soon.
Bituminous roofs are affordable and reliable. They work well in most climates and are easy to repair. According to industry data, over 5 million roofs are installed per year in the U.S., with most being replacements of old bituminous systems.
Built-up Vs. Asphalt Shingles
Bituminous roofing comes in two main types:
- Built-up roofing (BUR): Multiple layers of bitumen and felt, often used on flat roofs. Lasts 20 to 30 years.
- Asphalt shingles: Pieces of material coated with bitumen, used on sloped roofs. Last 20 to 30 years.
- Modified bitumen: A newer type that’s more flexible and durable than older BUR systems.
Most homes use asphalt shingles because they’re easy to install and affordable. Built-up roofing works better for flat roofs on commercial buildings.
Talk with a local roofing contractor to review your options and get a detailed estimate for your project.