Felt roofing and rubber roofing are two common options for protecting homes, sheds, and extension roofs. This guide compares their materials, installation, durability, costs, and best-use scenarios to help homeowners choose wisely. By understanding the differences between traditional felt (asphalt felt) and modern rubber roofing (EPDM and similar polymers), readers can evaluate performance, maintenance, and long-term value for their specific climate and budget.
What Is Felt Roofing?
Felt roofing typically refers to asphalt-saturated felt used as an underlayment or as a primary roof covering in some low-slope applications. Traditional felt sheets are layered with an asphalt coating to create a water-shedding surface. Modern variants may include fiberglass or poly-fatty blends to improve strength and tear resistance. Felt is favored for affordability and ease of installation on small or non-vented roofs, but it often requires additional roof coatings or cap sheets for enhanced water resistance in exposed exterior conditions.
Key characteristics include simple installation, compatibility with many roof decks, and a lower initial cost compared with some synthetic systems. The trade-offs are a shorter lifespan under severe weather, more frequent maintenance, and higher vulnerability to UV degradation if not properly covered. Felt roofs are common on sheds, porch roofs, and accessory structures where long-term performance is less critical than upfront savings.
What Is Rubber Roofing?
Rubber roofing refers to a flexible, synthetic membrane usually made from ethylene propylene diene monomer (EPDM) or other polymer blends. It is designed for flat or low-slope roofs and provides a seamless, durable water barrier. Rubber roofing comes in rolls or pre-fabricated sheets and can include reflective coatings or granulated surfaces to improve energy efficiency and durability. EPDM is known for its resistance to UV light, temperature fluctuations, and ponding water, making it a popular choice for residential and commercial flat roofs.
Rubber roofing offers a long service life, typically 25 to 50 years depending on thickness, installation quality, and climate. It is relatively easy to repair with sealants or patches and is highly resistant to chemical exposure and weathering. The material’s flexibility allows it to handle roof movements and seasonal expansion without cracking, which is beneficial in regions with freeze-thaw cycles.
Key Differences
- Material composition: Felt is asphalt-saturated fabric; rubber roofing is synthetic polymer (EPDM, TPO variants).
- Durability: Rubber generally outperforms felt in durability, UV resistance, and weatherproofing.
- Lifespan: Felt often lasts 10–20 years with proper maintenance; rubber roofs commonly last 25–50 years.
- Installation: Felt can be installed with standard roofing methods, but rubber requires precise seam welding or adhesive bonding for a seamless membrane.
- Maintenance: Felt needs periodic coatings or cap sheets; rubber requires infrequent maintenance and occasional sealant touchups.
- Cost: Felt has a lower upfront cost; rubber typically has a higher initial price but lower long-term maintenance costs.
Durability and Lifespan
Durability depends on climate, roof slope, and installation quality. Rubber roofs excel in resisting ponding water, temperature swings, and UV exposure. In regions with heavy sun, heat, or thermal expansion, EPDM’s elasticity helps prevent cracks and leaks. Felt roofs are more prone to drying, cracking, and wind uplift if not reinforced with additional layers or coatings. Across the United States, rubber roofing often provides superior long-term performance for flat and low-slope roofs, while felt remains a budget-friendly option for non-critical applications or temporary coverings.
Cost and Installation
Initial cost comparisons vary by region and roof size, but felt roofing typically costs less per square foot than rubber roofing. Installation for felt is straightforward for experienced roofers and can be completed quickly, reducing labor time. Rubber roofing requires specialized techniques, such as heat-welding seams for EPDM or mechanical fastening for certain TPO options, which can increase installation time and cost but yields a more watertight seal and longer service life.
Warranty considerations also play a role. Rubber roofing systems often come with longer manufacturers’ warranties, reflecting their durability. Felt underlayment or cap sheets may be covered by shorter guarantees, depending on the product and performance requirements. Homeowners should balance upfront costs with expected lifespan, maintenance needs, and energy savings when evaluating total cost of ownership.
Maintenance and Repairs
Felt roofing maintenance usually involves periodic inspections, cleaning, and re-coating or applying protective cap sheets as needed. Repairs can be patchwork-based and may require reapplication of asphalt or replacement of damaged sections. Rubber roofing benefits from occasional inspections for pooled water, membrane integrity, and edge detailing. Patches and sealants are common repair methods, but extensive damage may necessitate panel replacement or full membrane refurbishing.
In both systems, proper attic ventilation and roof drainage are critical to extend life. Debris buildup, standing water, and poor flashing details can accelerate deterioration in either material.
Best Uses and Weather Considerations
Felt roofing is well-suited for temporary or budget-conscious projects, decorative structures, or roofs with adequate slope that minimize ponding. It can also serve as a secondary barrier under a more durable roof system. Rubber roofing shines on flat or low-slope residential roofs, garages, carports, and commercial buildings in climates with heavy rainfall or freeze-thaw cycles. Its water resistance and resilience to temperature changes make it a reliable choice for year-round protection.
Climate impact matters: hot, sunny areas benefit from the reflective options available for rubber membranes, which help reduce cooling loads. In regions with extreme cold, ensure proper detailing to manage contraction and expansion. Consider local codes and roof pitch recommendations when selecting felt or rubber for a given structure.
Environmental Impact and Sustainability
Rubber roofing, particularly EPDM, is often recyclable at the end of life and can be manufactured with more sustainable production practices. Some rubber systems feature reflective or white finishes to reduce heat absorption and urban heat island effects. Felt roofing, being asphalt-based, has a larger environmental footprint in terms of production and disposal, though some recycled content options and compatible coatings can mitigate impact. Homeowners should weigh lifecycle energy use, waste, and recyclability alongside performance.
Choosing Between Felt and Rubber Roofing
Key decision factors include budget, roof type, climate, and expected maintenance. For low-slope roofs where long-term performance matters, rubber roofing is typically the better investment due to durability, leak resistance, and longevity. For temporary coverings, value-focused projects, or where a quick, low-cost solution is required, felt roofing may suffice. A professional assessment can help determine pitch, existingDeck condition, flashing details, and drainage to select the most appropriate system.
Pro tips: Get multiple quotes that detail material, seam type, insulation, and warranty. Request a climate-specific installation plan, including UV protection and drainage considerations. If replacing felt with rubber, ensure substrate compatibility and proper venting to maximize performance.