DuPont™ ArmorWall™ Systems are building enclosure systems that include a composite panel component commonly referred to as a Structural Insulated Sheathing (SIS) panel.
ArmorWall™ FR SIS products utilize a 1/2″ layer of Magnesium Oxide (MgO) sheathing on the exterior face of the panel due to its high performance in fire resistance. Magnesium is present in large quantities all over the planet, where it is the eighth most abundant mineral on Earth. Magnesium Oxide is similar to gypsum compounds that design teams are accustomed to using for many years.
By replacing common gypsum and cementitious compounds that are commonly found in other construction materials with Magnesium Oxide, ArmorWall™ FR SIS products deliver top of the line fire-resistance, durability, and strength. This, combined with proprietary scrim formulations, creates a structural sheathing board that is unmatched in many of today’s performance categories.
Poured Polyurethane Insulation
The industry innovation of ArmorWall™ FR SIS products do not stop there. From our beginning, we understood the contribution to the difficulty and labor from required continuous insulation compliance and the multiple steps required to assemble the commercial wall. We developed another proprietary formula of a poured polyurethane (PUR) insulation layer.
As a true continuous insulation that isn’t broken other than the fasteners and mechanical penetrations, ArmorWall™ FR SIS products meet the definition in ASHRAE 90.1 for continuous insulation (ci), which few products and assemblies can match.
A prominent concern with traditional components is the attachment of claddings and veneers to the wall assembly once several inches of insulation has been attached to the exterior stud face. Due to the structural strength of the panel, cladding attaches directly to the structural sheathing and no longer requires attachment back to the stud frame assembly or substrate. Because there is no requirement, cladding can be mechanically fastened to nearly any location on the exterior Magnesium Oxide sheathing of the ArmorWall™ FR SIS panel.