ABOUT Enercept


The Leading Provider For Premium SIPs

Enercept has been manufacturing quality Structural Insulated Panels (SIPs) since 1981.

Enercept started as a subsidiary of Energy Concept in 1981. With the vision of crafting a future in manufacturing structural insulated panels, founder Harold Henley dared it all. By 1982, Enercept, Inc. built a 26,000 square-foot facility of their own design and products in Watertown, South Dakota. 

Enercept designs custom Structural Insulated Panels (SIPs) to fit your building needs. Whether you’re building a timber frame, conventional home, commercial, agricultural or light industrial structure, Enercept SIPs are the perfect fit for your project. Our SIPs are high-performance building panels made with an expanded polystyrene (EPS) rigid foam core sandwiched between two structural skins of 7/16″ oriented strand board (OSB) used in floors, walls, and roofs.  Enercept’s standard 6″ SIP wall has an R-25 value, and we additionally offer R-40 or R-50 panels for your roof.  Every panel is custom-manufactured to fit. Each panel comes with our standard features including:

  • Enercept installs electrical chases at the factory and has developed an easy to follow electrical guide for your electrician.
  • Enercept’s unique 4-foot line panel press can accommodate panel core thickness from 1″ to 16″.
  • Enercept is known in the SIP industry for our ability to produce panels for even the most difficult designs. We employ an experienced drafting team to assist you with SIP design questions.
  • Enercept can provide a virtual on-site training technician for builders to ensure quality construction and minimize the learning curve.
  • We include a detailed Construction Guide, Electrical Guide, and durable panel layout drawings with every project.
  • Not only have we been in business since 1981, but we were also the original holders of the patents for our insulated panel system, which virtually eliminate thermal bridging. Our patented design means faster, easier, stronger construction.

Enercept panels have been used internationally with projects in Antarctica, Greenland, Spain, Japan, Switzerland, France, Mexico and Canada. The largest project utilizing Enercept SIPs is the International Science Station located at the South Pole.

In 2012, Enercept added an 8’wide (jumbo) panel line.

Enercept is a proud member of The Structural Insulated Panel Association (SIPA) and the National Association of Home Builders (NAHB).