What Is ThermaSteel

The ThermaSteel Structural Insulated Panel building system is the high-tech alternative to traditional SIPs (Structural Insulated Panels). ThermaSteel’s patented composite bonding technology bonds light gauge steel structural members together with EPS, delivering a stronger, lighter wall system which installs faster, and provides structural framing, insulation, sheathing and vapor barrier all in one step. By eliminating thermal bridging and air infiltration, effective R ratings may be boosted to as much as R-65.



Building up to eight stories in one efficient process, with only panels, and in one step providing structure, insulation, sheathing, and vapor barrier, this is the composite difference. This would be enough, but we also do it faster, at a lower cost, and with the result of a stronger, safer, higher efficiency building, with effective R ratings from R-35 to R-49.

The foundation of this capability is ThermaSteel’s patented composite nature. Our unique process of infusing and bonding structural steel members to EPS results in a structural panel that is very light and incredibly strong. While it’s true that our products fall into the category of Structural Insulated Panels (SIPS), these capabilities put ThermaSteel in a category all its own.


Basic Use

The ThermaSteel Building System is used for commercial construction projects, single and multi-family, as well as industrial and institutional applications.

ThermaSteel panels feature a patented process, using composite technology consisting of structural grade double steel frames with rigid, fire retarding EPS bonded to the steel frame. This process produces a lightweight composite panel that provides structural framing, insulation, sheathing, and vapor barrier in one unit.

ThermaSteel panel installation begins with the installation of the bottom track along the perimeter of the floor. The panels are then placed in the track, screwed in place and then screwed together along the leading edge steel. Once the panels are in place, a connecting  track is installed along the top of the panels. This forms a quick assembling building system that is lightweight and extremely strong.

Because the studs are oriented to the face of the panel and the tongue-in-groove joints are used at the edges, the system provides a complete thermal break, with superior thermal performance. Rough openings for doors and windows are formed during the manufacturing process. Horizontal wire chases are molded into each panel to accommodate electrical wiring. Additional chases for electrical and plumbing are easily
cut in the field with a hot knife.

The ThermaSteel Building System can support multi-story loads up to eight stories and as in-fill and curtain walls in high-rise applcations. The “H”, or Hurricane panel has passed the Southern Florida Hurricane Test. It has also undergone third-party testing for energy code approval, including Uniform Code Approval IAPMO-ES 0128.