SpecTips: A Single-Ply Solution for Superior Hail and Puncture Performance

145-mil FleeceBACK EPDM – The Solution for Hail and Puncture Prone Roofs

A common theme among architects and designers is the misconception that fluid-applied or built-up roofs (BUR) are the only systems that can be considered for projects susceptible to hail and punctures, and for plaza overburden applications. While fluid-applied or built-up roofing systems can provide performance benefits, there are single-ply options available that offer as good or better hail and puncture resistance while offering the installation benefits of a single-ply membrane.   

Fluid-applied roofing systems are a popular choice for high-performance projects due to their seamless and monolithic installation. While this characteristic can offer certain benefits, it does not automatically translate to superior performance. These systems are dependent on a quality installation and proper material thickness to ensure the desired performance. Like fluid-applied systems, BUR systems consist of multiple layers such as reinforcing fabrics and asphalt. While this layered construction can contribute to overall strength, it does not inherently guarantee superior puncture performance. The system's resistance to punctures depends on various factors, including the type and thickness of felts used, the number of layers, and the quality of the installation. BUR systems can also be vulnerable to aging and degradation over time, compromising their ability to perform long-term.  

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When specifying a roofing system, especially one in a hail zone or one more prone to punctures such as plaza overburden applications, it is crucial to consider things like performance, resiliency, and installation. Carlisle’s 145-mil FleeceBACK^® EPDM combines a 90-mil EPDM membrane – which offers increased puncture resistance by itself – as well as a 55-mil reinforced fleece backing to further enhance puncture performance. 145-mil FleeceBACK EPDM provides the ease of installation single-ply membranes are known for, along with the following additional performance benefits:

1. Enhanced Protection: FleeceBACK EPDM membrane offers exceptional hail and puncture resistance, providing enhanced protection and resiliency with the ability to withstand the impact of up to 4” hailstones. The reinforced fleece backing adds an extra layer of defense, making this membrane more resistant to punctures from sharp objects and foot traffic.
2. Extended Roof Lifespan: The hail and puncture resistance of FleeceBACK EPDM contributes to an extended lifespan for the roofing system.  This reduces the need for frequent repairs or premature replacement, resulting in long-term cost savings and sustainability benefits.
3. Reliable Performance in Severe Weather Conditions: FleeceBACK EPDM's hail resistance ensures resiliency in severe weather conditions, preserving the functionality of the roofing system and protecting the building’s interior.
4. Minimized Maintenance Requirements: The hail and puncture resistance of FleeceBACK EPDM minimize the need for ongoing maintenance and reduce the frequency of repairs and maintenance interventions. This translates to lower maintenance costs and less disruption to building occupants.
5. Suitable for High-Traffic Areas: FleeceBACK EPDM's puncture resistance makes it an ideal choice for roofs with high foot traffic or areas where regular maintenance activities are necessary. It can withstand the weight and impact associated with foot traffic, equipment installations, service personnel access, and plaza overburden systems without compromising its integrity or performance.
6. Reliable Warranty Coverage: FleeceBACK EPDM's hail and puncture resistance often come with comprehensive warranty coverage. Carlisle recognizes the outstanding performance of this membrane and offers extended warranties that provide up to 4” hail coverage and 36 hours of accidental puncture when using 145-mil FleeceBACK EPDM with full coverage Flexible FAST™ Adhesive.

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SPECTIP

• Add EPDM FleeceBACK product to the Division 7 Section for EPDM in Section 075323. 
• Select Fabric-Backed EPDM Sheet: ASTM D4637, Type III, non-reinforced, EPDM sheet, laminated to a nonwoven polyester fabric backing except at selvages. (With factory-applied seam tape.)
• For more information regarding this assembly, refer to our EPDM FleeceBACK Adhered Form Specification. 

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For more information, check out the below resources. 

FleeceBACK EPDM Membranes w/FAT Product Data Sheet
ASTM D5635 - FleeceBACK EPDM Dynamic Puncture Resistance Video