The Leading Provider For Premium SIPs

Enercept has been manufacturing quality Structural Insulated Panels (SIPs) for over 30 years.

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 huge, 26,000 square-foot facility of its own design and products in Watertown, South Dakota. 

Enercept designs custom Structural Insulated Panels (SIPs) to exactly fit your building needs. Whether you’re building a timber frame, conventional home, commercial, agricultural or light industrial 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-24.87 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 factory-installs electrical wiring in our SIP roof panels (when allowed by local code).
  • 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 an on-site training technician for first-time builders to ensure quality construction and minimize the learning curve.
  • We include a detailed Construction Guide, Electrical Guide, and durable panel layouts with every project.
  • Not only have we been in business for over 35 years, but we were also the original holders of the patents for our insulated connecting posts, 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), the National Association of Home Builders (NAHB) and the Timber Framers Guild.



Denver Log Home and Timber Show:

September 28-30, 2018


Greenbuild International Conference & Expo

November 14-16, 2018



SIPs and the HERS Index - Dare To Go Low

The Path to Net Zero Energy Homes According to the Structural Insulated Panel Association, there were over 2,000 homes in the United States receiving a HERS Index of 40 or less in 2017.

July 18, 2018 Read more

Love Affair With Log Homes

Often associated with American colonial life, log cabins have a long history in the United States and are still popular today. Today's Log Homes are being built to be more energy efficient and are often topped off with a SIP roof.

July 18, 2018 Read more