What Is a Roll Roof and How Is It Used in Roofing

Roll roofing is a popular and cost-effective roofing material commonly used in low-slope or flat roofing applications across residential and commercial buildings in the United States. This versatile roofing option offers a straightforward installation process and durable weather protection. Understanding what roll roofing is, its types, benefits, and limitations helps homeowners and contractors make informed decisions about their roofing needs.

What Is Roll Roofing?

Roll roofing is a roofing material supplied in large rolls, typically 36 inches wide and 33 feet long. It consists of a base mat made from materials such as organic felt or fiberglass, which is saturated and coated with asphalt for waterproofing. The surface is often embedded with granules for UV protection and durability. This material is designed for quick application on roofs with a low slope, making it an attractive choice for budget-conscious projects or temporary roofing solutions.

Types of Roll Roofing

There are several types of roll roofing products available, each offering different materials and benefits:

• Asphalt-Saturated Felt: Traditional option made from organic fibers saturated with asphalt. Affordable but prone to faster wear under harsh environments.
• Fiberglass-Based Roll Roofing: Contains fiberglass mats offering higher durability, better fire resistance, and longer life compared to organic felt.
• Synthetic Roll Roofing: Made from advanced polymers, these are more flexible and can resist cracking or tearing better in extreme weather conditions.
• Mineral Surface Roll Roofing: Often includes a mineral granule surface for enhanced protection against UV rays and weathering.

Common Uses of Roll Roofing

Roll roofing is commonly applied on structures with low-pitch or flat roofs where conventional shingle roofing is impractical. Common applications include:

• Sheds, garages, and outbuildings
• Small residential roof areas with limited slope
• Commercial buildings with large flat roofs
• Temporary roofing solutions during repairs or construction

This material is valued for its easy installation and affordable pricing in such scenarios.

Benefits of Roll Roofing

• Cost-Effective: Roll roofing is less expensive than traditional shingle or metal roofing, making it a budget-friendly option.
• Ease of Installation: Its lightweight rolls can be quickly rolled out and fastened, reducing labor time and costs.
• Waterproofing: Asphalt-coated layers create a reliable moisture barrier suitable for low-slope roof protection.
• Flexibility: The material can conform to irregular roof shapes, accommodating simple roofing designs effectively.
• Lightweight: It adds minimal weight to the roof structure compared to other materials.

Limitations and Drawbacks of Roll Roofing

Despite its benefits, roll roofing has notable limitations:

• Shorter Lifespan: Typically lasts 5 to 15 years, which is less than architectural shingles or metal roofing.
• Limited Aesthetic Appeal: Roll roofing has a plain appearance that may not satisfy aesthetic standards for primary residences.
• Susceptibility to Damage: Can be vulnerable to cracking, blistering, or tearing in extreme weather or temperature fluctuations.
• Not Ideal for Steep Roofs: Designed specifically for low-slope applications; improper use on steep roofs can lead to failures.
• Maintenance Requirements: Regular inspections and repairs are needed to extend service life and prevent leaks.

How Roll Roofing Is Installed

Roll roofing installation involves several steps to ensure proper waterproofing and durability:

1. Preparation: The roofing surface must be clean, dry, and smooth. Any old roofing material should be removed to create a flat base.
2. Measuring and Cutting: Rolls are measured and cut to fit the dimensions of the roof, allowing for proper overlap.
3. Application: Rolls are unrolled and aligned on the roof deck. Installation methods include nailing, stapling, or adhering with roofing cement or adhesives.
4. Overlapping: Each roll is overlapped by several inches to prevent water infiltration.
5. Sealing Edges: Edges and seams are sealed with roofing cement or sealants to enhance waterproofing.
6. Inspection: After installation, the roof is inspected to ensure no gaps or loose areas that could lead to leaks.

Maintenance Tips for Roll Roofs

Proper maintenance can help extend the life of a roll roof:

• Inspect for cracks, blisters, or tears annually and after severe weather events.
• Clear debris and mildew buildup promptly to prevent damage.
• Reapply roofing cement on edges or seams showing signs of separation.
• Keep gutters and downspouts clean to ensure effective water drainage.
• Schedule professional roof inspections every few years for in-depth assessment.

Alternatives to Roll Roofing

When considering longevity, appearance, and performance, several alternatives complement or replace roll roofing:

Choosing alternatives depends on budget, roof design, and desired lifespan.