"Composition roof" is one of those terms roofers use constantly and rarely explain. If you've seen it on an inspection report or a quote, here's exactly what it means — and why it's on roughly four out of five American homes.
What a composition roof is
A composition roof is a roof made from composition shingles — also called asphalt shingles or "comp" shingles. The name comes from the fact that each shingle is a composite of several materials layered together, rather than a single natural material like slate, clay or wood.
A typical composition shingle is built from three layers:
- A base mat of fiberglass (modern shingles) or, historically, organic felt — this gives the shingle its strength and shape.
- Asphalt coating that saturates and waterproofs the mat.
- Mineral granules embedded on the surface that protect the asphalt from UV and give the shingle its color and fire resistance.
That layered construction is why they're so popular: they're affordable, durable enough for most climates, easy to install and repair, and come in dozens of colors and styles.
The main types of composition shingles
| Type | What it is | Typical lifespan |
|---|---|---|
| 3-tab | Flat, single-layer shingle with a uniform look. The budget option. | 15–20 years |
| Architectural (dimensional) | Multi-layer shingle with a thicker, textured, more premium appearance. The most common choice today. | 25–30 years |
| Premium / luxury | Heavier shingles designed to mimic slate or wood shake. | 30–50 years |
Most new roofs installed today use architectural shingles, which balance cost, looks and longevity. We cover lifespan in detail in how long a composition roof lasts.
Pros and cons
Pros
- Lowest upfront cost of common roofing
- Wide range of colors and styles
- Easy and quick to install and repair
- Good performance in most climates
- Widely available; every roofer works with them
Cons
- Shorter lifespan than metal, tile or slate
- Can be damaged by high wind and hail
- Dries out and gets brittle with age (where rejuvenation can help)
- Less energy-efficient than reflective options
What a composition roof costs
Composition is the most budget-friendly mainstream roofing. Material and installation costs vary widely by region, roof complexity and shingle grade, but composition consistently undercuts metal, tile and slate — which is exactly why it dominates the market. To estimate your own roof's size before getting quotes, use our roof square footage calculator.
A composition roof is an asphalt-shingle roof — a layered composite of fiberglass, asphalt and mineral granules. It's affordable, versatile and easy to maintain, which is why it's the default choice for most American homes.
Frequently asked questions
Is a composition roof the same as asphalt shingles?
Yes. "Composition," "comp" and "asphalt" shingles all refer to the same thing — shingles made from a fiberglass or felt mat coated in asphalt and topped with mineral granules.
What are the types of composition shingles?
The three main types are 3-tab (flat, budget), architectural or dimensional (thicker, textured, most popular), and premium/luxury shingles that mimic slate or wood shake.
How long does a composition roof last?
It depends on the type: 3-tab lasts about 15–20 years, architectural shingles 25–30 years, and premium shingles 30–50 years, with climate and maintenance playing a big role.
Is a composition roof good?
For most homes, yes. It offers the best balance of cost, availability, ease of repair and decent durability. Metal, tile and slate last longer but cost considerably more.
BCG Roofing Services — practical roofing guides and professional repair, rejuvenation and storm-damage services across Sarasota, Bradenton & Southwest Florida. Questions about your roof? Get a free inspection.
