Metl-Span’s ThermalSafe® Non-Exposed Fastener (NEF) mineral wool panel is the latest development in fire resistant wall construction technology and provides a flush appearance.
ThermalSafe® combines advanced panel design with Metl-Span’s sophisticated manufacturing expertise to create a composite panel with a core made from non-combustible structural mineral wool boards that are processed in the factory to maximize compressive strength. The resulting fire rated panel has superior structural characteristics and span capability. Metl-Span has created this mineral wool panel to achieve a one-, two- or three-hour fire resistance rating under the most demanding conditions. In addition to its fire resistance characteristics, the panel provides good thermal performance and protection from the elements. The unique LockGuard® interlocking side joint further enhances the fire resistant performance of the panel with its tongue and groove engagement of the mineral wool core.
Thickness: Nominal 4″, 5″, 6″, 7″, 8″
Length: 8′-0″ to 40′-0″, variable by thickness.
R-Value: The core insulating properties are 3.61 “R” per inch
Exterior Profile: Ultra-Light Mesa, Santa Fe or Light Striated, nominal 1/32″ deep, embossed
Exterior Face: G-90 galvanized or AZ-50 aluminum-zinc coated steel in 26 and 24 Ga.
Interior Profile: Ultra Light Mesa, nominal 1/32″ deep, embossed
Interior Face: G-90 galvanized or AZ-50 aluminum-zinc coated steel in 26 and 24 Ga.
Joint: Exclusive LockGuard side joint has a flush, double-tongue-and-groove connection of the metal faces with an advanced integral spline to join the mineral wool core
Core: Non-combustible, rigid mineral wool lamellas. Mineral wool fibers are oriented perpendicular to the panel faces for maximum structural strength.
Thermal Values: K-Factor of 0.275 at 75°F (24°C) mean temperature (btu/sf/hr./deg.F)
Testing & Certifications: See Data Sheet