Enercept

Enercept Enercept is the builders' choice for structural insulated panels (SIPS). By 1982, Enercept was incorporated and built a huge, 26,000 sq. ft. Mike S.

Enercept, started as a subsidiary of Energy Industries in 1981, with the vision of crafting a future in manufacturing structural insulated panels, founder Harold Henley dared it all. facility of its own design and products in Watertown, SD. Enercept has been manufacturing SIPs since 1981. Enercept designs custom Structural Insulated Panels (SIPs) to exactly fit your timber frame. Whether you're bu

ilding a full timber frame or a hybrid (partial timber frame), enclosing timber frames with SIPs is 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. Each and every panel is custom manufactured to fit on your timber frame. 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 an on-site training technician for first-time builders to ensure quality construction and minimize the learning curve. A detailed Construction Guide, Electrical Guide and durable panel layouts are issued with every project. Not only have we been in business for over 35 years, 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, Spain, Japan, Switzerland, France, Mexico and Canada. The largest project being the recently completed 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

Testimonials:

"I've been using Enercept panels for the roof and gables of the log homes I build for many years. The people at Enercept are friendly, knowledgeable and always helpful. The panels are amazingly easy and fast to assemble because they come completely fabricated. The window openings and complex roof angle cuts are done at the factory - we don't have to cut any panels on site, they just slip together." "I would rate the insulation qualities of our Enercept home 100% better than any other house we have lived in. Even the floors in the basement, which are constructed of Enercept panels, are warm to the touch, even with the coldest temperatures outside. One of the major factors in deciding to build an Enercept home was the energy efficiency. After living in our home over the winter, I can say with certainty that the decision was a very wise one. I would recommend building an Enercept home to anyone that asks me." L Andera​

"Delivery was coordinated in a very thoughtful way to reduce costs and worked out beyond what one would normally expect. The panels were constructed very well and were precise. Thanks for the opportunity of dealing with a great company!"
Dave K.​

When do SIPs make sense, and when do they make $?
05/04/2026

When do SIPs make sense, and when do they make $?

40 likes, 5 comments. "When Enercept SIPs make sense and when they make dollars!"

Earth Day 2026: Why high-performance building matters more than ever.
04/22/2026

Earth Day 2026: Why high-performance building matters more than ever.

Building Green Earth Day Every Day

04/06/2026
04/06/2026

If you've decided to build with SIPs, what's your next step? Jon Golz points you in the right direction.

https://bit.ly/4sePKUxHeld in our corporate offices and manufacturing facility in Watertown, South Dakota, Enercept Univ...
04/02/2026

https://bit.ly/4sePKUx
Held in our corporate offices and manufacturing facility in Watertown, South Dakota, Enercept University is a two-day workshop focusing on all things SIPs, from seeing how the foam is made to assembling panels for a small cabin. Registration opens in December. Space is limited to 50 attendees.

Which part of your home is least efficient and costing you the most each month?
03/30/2026

Which part of your home is least efficient and costing you the most each month?

www.enercept.comEvery winter, your home could be losing more heat than you think.In traditional construction, walls are built piece by piece—studs, insulatio...

Come check out the Enercept booth at the Black Hills Home Builders Association Home Show this weekend. Ask Neal for a fr...
03/27/2026

Come check out the Enercept booth at the Black Hills Home Builders Association Home Show this weekend. Ask Neal for a free carpenter's pencil and talk about your building plans.

Address

3100 9th Avenue SE
Watertown, SD
57201

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 12pm

Telephone

+16058822222

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