Asphalt shingles and composition shingles are terms often used interchangeably in American home improvement conversations. However, they describe slightly different understandings of roofing materials. This article explains what each term generally means, highlights their similarities and differences, and helps homeowners decide which option fits their roof, budget, and climate.
What Are Asphalt Shingles?
Asphalt shingles are a type of roofing material made primarily from a fiberglass or organic base mat coated with asphalt and mineral granules. The asphalt provides waterproofing, while the granules protect the shingle surface from UV exposure and provide color. Fiberglass-based asphalt shingles are the most common today, offering improved fire resistance and lighter weight compared with older organic variants.
Key features of asphalt shingles include:
- Composition: Fiberglass or organic mat, asphalt coating, mineral granules.
- Durability: Typically 20–30 years depending on quality and climate; architectural (dimensional) shingles last longer than 3-tab versions.
- Cost: Generally affordable relative to other roofing options.
- Installation: Widely installed by professionals; compatible with standard roofing decks and underlayment.
What Are Composition Shingles?
The term “composition shingles” is a broader category used to describe roofing shingles made from multiple materials designed to provide similar benefits as asphalt shingles. In practice, many manufacturers label modern composite shingles as composition shingles because they combine asphalt with additional reinforcing materials and modifiers, sometimes including polymers, rubber, or recycled plastics. In the United States, the majority of composition shingles are asphalt-based with added components to enhance performance.
Common traits of composition shingles include:
- Base Materials: Asphalt is common, but some products use modified asphalt blends or polymer-enhanced layers.
- Reinforcement: Glass fiber or organic mats fortify the shingle for flexibility and tear resistance.
- Appearance: Designed to mimic different roof profiles, including traditional three-tab and architectural styles.
- Durability: Engineered to improve impact resistance, wind resistance, and longevity beyond basic asphalt in some lines.
Key Differences Between Asphalt And Composition Shingles
While composition shingles often refer to asphalt-based products with enhanced features, the following distinctions help clarify when people use each term:
- Terminology: Asphalt shingles is the period term for the standard product, whereas composition shingles emphasize engineered, multi-material construction and performance enhancements.
- Material Mix: Both can be asphalt-based, but composition shingles frequently incorporate polymers or other modifiers for improved durability and flexibility.
- Performance Variants: Architectural or dimensional asphalt shingles are often marketed as more premium composition-like products due to thicker profiles and longer warranties.
- Common Misconceptions: Some homeowners think composition shingles are entirely different materials from asphalt; in practice, most composition shingles are asphalt-based with added reinforcements.
Performance And Longevity
Performance depends on the product line, installation quality, climate, and maintenance. General expectations include:
- Lifespan: Standard asphalt shingles typically last 20–30 years; architectural variants can reach 30–50 years with proper care, while high-performance composites may extend that range in favorable conditions.
- Wind Resistance: High-quality shingles with proper installation resist higher wind speeds; some composition shingles are rated for 130–150 mph or more, depending on fastener patterns.
- Impact Resistance: Composite blends sometimes offer improved impact resistance, appealing to hail-prone regions.
- Fire Resistance: Most asphalt and composition shingles used in residential roofing carry a Class A fire-resistance rating when installed correctly.
Cost And Installation
Cost considerations influence material choice for most homeowners. General guidance:
- Initial Cost: Standard asphalt shingles are among the most affordable roofing options, with cost varying by brand, warranty, and whether the shingle is 3-tab or architectural.
- Long-Term Value: Architectural or premium composition shingles can provide better aesthetics, longer warranties, and potentially lower maintenance costs over time.
- Labor: Installation costs are similar between asphalt and composition shingles because both use comparable installation methods and decks.
- Warranties: Warranties vary by brand and product line; longer warranties often accompany higher-priced architectural or composite shingles.
Choosing Between Them
Decision factors include climate, roof slope, aesthetic goals, and budget. Consider:
- Climate: In hail-prone or windy areas, look for composition shingles with higher impact and wind resistance ratings.
- Aesthetics: Architectural and premium composition shingles offer varied textures and dimensional looks similar to wood shakes.
- Budget: If upfront cost is a major concern, standard asphalt shingles provide solid performance at a lower price point.
- Installation Quality: Regardless of material, expert installation is crucial for achieving expected performance and warranty validity.
Maintenance And Repairs
Maintenance helps maximize the life of both asphalt and composition shingles. Practical steps include:
- Regular Inspections: Check for curling, missing granules, or damaged flashing after storms.
- Gutter Cleaning: Keep gutters clear to prevent water backup that can affect roof edges.
- Moss and Algae: In humid regions, remove moss and apply appropriate inhibitors to prevent moisture damage.
- Repairs: Address damaged shingles promptly to prevent leaks; shingle replacement is straightforward if local damage is isolated.
Environmental Considerations
Both asphalt and composition shingles have environmental implications. Recyclability varies by manufacturer and local programs, but many asphalt shingles can be recycled into asphalt pavement or other products. Choosing recyclable products and working with installers who participate in recycling programs can reduce waste. Additionally, selecting energy-efficient, reflective shingles can lower cooling costs in hot climates.
Summary
In practice, asphalt shingles and composition shingles are closely related, with composition often describing enhanced, engineered versions of asphalt-based products. The choice hinges on performance needs, climate, appearance, and budget. Homeowners should evaluate specific product ratings, warranties, and installation quality to determine the best fit for their roof.