SpecTips: Achieving High Wind and Very Severe Hail Ratings with a Single Product

A Composite Insulation Panel for Extreme Wind and Hail Performance

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In many areas of the country, high wind speeds and very severe hail have become significant concerns for designers and building owners alike. A study conducted by Princeton University found that average wind speeds have increased 7% since 2010. In 2018, FM Global added the Very Severe Hail (VSH) designation as a requirement in 14 states where hail can exceed two inches in diameter. High winds and very severe hail are especially problematic in the Midwest and West South-Central regions of the United States, where designers have struggled to design their roofing systems to be resilient against these environmental extremes.

SecurShield^® HD Composite is Carlisle’s first insulation product to achieve both a VSH rating from FM Global and a wind uplift rating of FM 1-300. Additionally, SecurShield HD Composite can achieve up to an FM 1-90 with only 6 fasteners per board. Carlisle’s SecurShield HD Composite achieves these difficult ratings due to its unique composition comprised of a ½” high-density polyiso cover board laminated to SecurShield rigid polyiso insulation with coated glass facers. SecurShield HD Composite is approved for buildings with both high wind uplift requirements and those requiring a VSH approved system.

SecurShield HD’s performance benefits help to improve the resiliency of the building while also offering the sustainability benefits of polyiso’s superior R-value – improving the building’s energy efficiency and reducing CO2 emissions.

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SPECTIP
To specify SecurShield HD Composite, include it as a Substrate Board for your single-ply roof assembly in Part II “Products” of the appropriate single-ply roof section of your project specification.
Division 7 – Thermal and Moisture Protection
075323 – Ethylene Propylene Diene Monomer (EPDM) Roofing
075419 – Polyvinyl Chloride (PVC) Roofing
075423 – Thermoplastic Polyolefin (TPO) Roofing

SecurShield HD Composite is a composite insulation panel comprised of ½” high-density (109 psi max) polyiso cover board laminated during the manufacturing process to SecurShield rigid polyiso roof insulation meeting ASTM C1289 Type IV, Grade 2 (20 psi). Available in 4’ x 8’ boards with thicknesses from 1.5” to 4.5” in 0.5” increments. 4’ x 4’ panels are also available.

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