Types of Rolled Roofing: A Comprehensive Guide for Homeowners
Rolled roofing is a practical, cost-effective solution for covering flat or low-slope roofs commonly found on sheds, garages, and some residential buildings. This roofing material comes in long, narrow rolls that are easy to handle and install. Understanding the different types of rolled roofing is essential for selecting the best option based on durability, climate, and budget.
| Type of Rolled Roofing | Description | Typical Use | Durability |
|---|---|---|---|
| Asphalt-Impregnated Rolled Roofing | Base felt saturated with asphalt and coated with mineral granules | Residential outbuildings, garages, sheds | 5-7 years |
| Mineral-Surfaced Rolled Roofing | Asphalt base with embedded mineral granules for UV protection | Low-slope roofs on small structures | 7-10 years |
| Modified Bitumen Rolled Roofing | Polymer-modified asphalt for better flexibility and durability | Flat commercial roofs, homes with minimal roof pitch | 10-15 years |
| Rubberized Asphalt Rolled Roofing | Highly flexible asphalt mixed with rubber polymers | Areas requiring enhanced waterproofing and cracking resistance | 15+ years |
| Metal Rolled Roofing | Thin metal sheets (aluminum or steel) offered rolled or in panels | Garages, sheds, agricultural buildings | 20+ years |
Asphalt-Impregnated Rolled Roofing
The most common and affordable type, asphalt-impregnated rolled roofing consists of a base felt saturated with asphalt to provide waterproofing. It is typically coated with mineral granules on the top surface to protect from UV damage. This roofing type is widely used for outbuildings and sheds due to its ease of installation and lower cost. However, its lifespan is relatively short, usually lasting 5 to 7 years, making it less suitable for long-term residential roofing.
Mineral-Surfaced Rolled Roofing
Mineral-surfaced rolled roofing upgrades the basic asphalt roll by embedding a layer of mineral granules into the coating. These granules enhance resistance to sunlight and weather, extending the material’s durability to 7-10 years. This type is often chosen for low-slope roofs on small structures that need a more robust protective layer but still desire an economical solution. It is moderately easy to install and can be cut to fit various roof sizes.
Modified Bitumen Rolled Roofing
Modified bitumen rolled roofing incorporates polymers into the asphalt, improving flexibility and resistance to temperature fluctuations. The polymer modification makes this roofing type more durable and elastic, able to withstand roof movements and thermal expansion without cracking. It’s commonly used for flat or minimal slope commercial and residential roofs where enhanced weather resistance is critical. With a lifespan of 10-15 years, this material is considered a mid-range investment balancing cost and longevity.
Rubberized Asphalt Rolled Roofing
Rubberized asphalt, sometimes called SBS (styrene-butadiene-styrene) modified roofing, is an advanced rolled roofing material. This product offers superior flexibility due to its rubber polymers, significantly boosting waterproofing capability and resistance to cracking and splitting. This makes it ideal for climates with wide temperature variations or structures requiring extra roof protection against water infiltration. It generally lasts over 15 years, making it one of the most durable rolled roofing options available.
Metal Rolled Roofing
Though not traditional rolled roofing, metal sheets such as aluminum or steel are also available in rolled forms that can be unrolled onto surfaces. These metal rolls provide excellent protection, durability, and resistance to fire, insects, and rot. Metal rolled roofing lasts 20 years or more and is popular for garages, agricultural buildings, and sometimes adaptable for low-pitch residential roofs. It requires specialized tools for installation but offers a long-lasting, maintenance-friendly roofing solution.
Comparing Rolled Roofing Types
| Characteristic | Asphalt-Impregnated | Mineral-Surfaced | Modified Bitumen | Rubberized Asphalt | Metal Rolled Roofing |
|---|---|---|---|---|---|
| Cost | Lowest | Low | Moderate | High | High |
| Durability (Years) | 5-7 | 7-10 | 10-15 | 15+ | 20+ |
| Flexibility | Low | Moderate | High | Very High | Low |
| UV Resistance | Moderate | Good | Good | Excellent | Excellent |
| Ease of Installation | Very Easy | Easy | Moderate | Moderate | Complex |
Choosing the Right Rolled Roofing for Your Project
When selecting rolled roofing, consider the roof’s slope, climate exposure, budget, and longevity requirements. For temporary or low-budget applications, asphalt-impregnated rolled roofing is ideal, but for longer life and better weather protection, modified bitumen or rubberized asphalt are preferred. In harsh climates or where maximum durability is essential, metal rolled roofing offers a superior solution despite higher installation complexity.
Installation Tips for Rolled Roofing
- Prepare the Roof Surface: Ensure it is clean, dry, and smooth before installation to promote adhesion and prevent damage.
- Use Proper Adhesives: Depending on the product, use roofing cement, hot asphalt, or cold adhesives recommended by the manufacturer.
- Apply Overlapping Layers: Overlap sheets by at least 3 inches to prevent leaks, staggering seams for improved protection.
- Seal Edges and Seams: Use appropriate sealants or adhesives to secure the edges and reduce water infiltration risk.
- Follow Safety Measures: Use fall protection and work carefully on low-slope or slippery surfaces to minimize accidents.
Maintenance and Longevity of Rolled Roofing
Regular maintenance extends rolled roofing life. Inspect annually for tears, blistering, or loose seams, and address issues promptly with patching or resealing. Clean debris and moss to prevent trapped moisture. While rolled roofing generally requires less upkeep than other roofing systems, small repairs can significantly delay costly replacements.