What Is Composition Roll Roofing

What Is Composition Roll Roofing: An In-Depth Guide

Composition roll roofing is a popular and cost-effective roofing solution widely used on residential and commercial buildings. It consists of flexible sheets made from a combination of materials designed to provide durability, weather resistance, and easy installation. This roofing type is often favored for low-slope rooftops and offers an economical alternative to more traditional roofing systems.

Composition Roll Roofing Materials and Construction

Composition roll roofing is typically composed of a base material like felt or fiberglass mat saturated with asphalt and coated with mineral granules. These layers work together to provide water resistance, durability, and protection from UV rays. The base felt serves as a reinforcement layer, ensuring the roofing holds its shape and strength.

The asphalt coating acts as a waterproof sealant, binding the granules in place and forming a protective surface. Mineral granules, often colored, provide resistance to sunlight and help extend the roof’s lifespan. This layered design makes roll roofing particularly effective against weather elements.

Types of Composition Roll Roofing

There are several varieties of composition roll roofing based on the base material and application method:

• Asphalt-Saturated Felt Roll Roofing: A traditional felt base saturated with asphalt; economical but less durable.
• Fiberglass-Based Roll Roofing: Uses fiberglass matting, offering greater strength and resistance to tearing.
• Torch-Down Roll Roofing: Modified bitumen roofing applied using a torch to melt the asphalt for a seamless, waterproof bond.
• Self-Adhering Roll Roofing: Features an adhesive backing for simple application without the need for extra nails or heat.

Installation Process of Composition Roll Roofing

The installation of composition roll roofing is straightforward compared to other roofing systems, which is one reason for its popularity. The process begins by preparing the roof deck to ensure it is clean, smooth, and dry.

The rolls are then measured and cut to fit the roof dimensions precisely. The chosen installation method is either:

• Nail-Down: Rolls are secured with roofing nails along the edges and center.
• Adhesive: Roofing adhesive or mastic is applied to adhere the roll to the deck.
• Torch-Down: A heat source melts the asphalt on the roll’s underside for a tight seal.

Proper overlap between rolls, typically 2 to 4 inches, ensures water tightness and prevents leaks. Flashing and edge treatments are critical finishing steps to protect seams and edges from wind and moisture damage.

Benefits of Composition Roll Roofing

Composition roll roofing appeals to many for its combination of affordability, ease of installation, and functional performance. Key benefits include:

• Cost Efficiency: The materials and labor required are more affordable than other roofing options.
• Quick Installation: Large rolls cover significant surface area, reducing installation time.
• Lightweight: Surprisingly light, it exerts minimal structural load making it applicable for older buildings.
• Waterproof Protection: Asphalt saturation and granules provide reliable waterproofing against rain and snow.
• Low Maintenance: Requires minimal upkeep if installed and maintained properly.

Common Applications for Composition Roll Roofing

This type of roofing is best suited for:

• Low-Slope Roofs: Flat or gently sloping roofs where water drainage is slower.
• Garages and Sheds: Structures requiring budget-friendly and weather-resistant roofing.
• Porches and Carports: Protective roofing that is easy to install in smaller areas.
• Temporary or Secondary Roofs: Useful for short-term solutions or secondary structures.

Limitations and Considerations

While composition roll roofing is economical and practical, it has some drawbacks worth noting:

• Shorter Lifespan: Typically lasts 8 to 15 years, less than shingles or metal roofing.
• Aesthetic Constraints: Limited in design and color variations compared to shingles or tiles.
• Susceptibility to Damage: Can be prone to cracking and tearing under extreme weather or foot traffic.
• Environmental Concerns: Asphalt-based roofing materials may have limited recyclability.

Proper maintenance and inspections can extend the life and performance of roll roofing, making it a practical choice for tight budgets and functional needs.

Maintenance Tips for Prolonging Roll Roofing Life

Routine maintenance is essential to maximize the durability of composition roll roofing:

• Regular Inspections: Check for tears, blisters, or exposed areas especially after storms.
• Clean Debris: Remove leaves, dirt, and branches to prevent water pooling.
• Repair Promptly: Seal any cracks or splits with roofing cement or patches.
• Ensure Proper Drainage: Clear gutters and downspouts to facilitate water flow.
• Limit Foot Traffic: Avoid walking on the roof unless necessary, and use walk pads when needed.

Comparing Composition Roll Roofing With Other Roofing Types