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 building 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.​

🍂 The leaves are falling, temperatures are dropping, but your comfort shouldn't! 🏈With Enercept Structural Insulated Pan...
09/29/2026

🍂 The leaves are falling, temperatures are dropping, but your comfort shouldn't! 🏈

With Enercept Structural Insulated Panels, you can build for better insulation, energy efficiency, and year-round comfort.
Don't let winter sack your energy efficiency! 🏈

🎅🎄 Guess Who’s Making the Nice List? 🎄🎅Our next spotlight is someone who works hard all year, but come Christmas time, h...
09/28/2026

🎅🎄 Guess Who’s Making the Nice List? 🎄🎅

Our next spotlight is someone who works hard all year, but come Christmas time, he has a little extra responsibility… making spirits bright! 🎁✨ You might know him as our very own Santa Claus! 😂🎅

We appreciate all the hard work, dedication, and holiday cheer he brings to our team. We’re lucky to have him, and we think he’s definitely earned a spot on the nice list!

09/25/2026
09/24/2026

Who knew our team had THIS much jumping talent? 😂🏗️

The tallest one barely leaves the ground… and somehow the shortest one has hops for DAYS. 💀😂

We may not all be able to jump high, but we can build high. 😉

Ready to turn your next project into something you’ll love? Come build with us! 🏠🔨


🌟 Shining a Spotlight on Another One of Our Amazing Team Members!We truly appreciate all the hard work, dedication, and ...
09/23/2026

🌟 Shining a Spotlight on Another One of Our Amazing Team Members!

We truly appreciate all the hard work, dedication, and positive energy Amanda brings to our team. We’re grateful to have you as part of the team and appreciate everything you do!

🏡 Building Progress in Valentine, Nebraska! 🏡We’re excited to share the progress on this beautiful two-story home with a...
09/22/2026

🏡 Building Progress in Valentine, Nebraska! 🏡

We’re excited to share the progress on this beautiful two-story home with an attached garage in Valentine, Nebraska!

A huge thank you to JBar Construction Specialties for their hard work, craftsmanship, and dedication throughout the installation process. Their team brought these Enercept panels to life with impressive speed and precision!

⏱️ Main floor panel installation: just 2 hours and 49 minutes!

We’re proud to showcase the work being done by the JBar team and can’t wait to see this home continue to take shape!

📍 Valentine, Nebraska
🏗️ JBar Construction Specialties
🏠 Enercept SIPs

Thank you, JBar, for doing an amazing job! 👏🏼

Nothing makes us happier than hearing our customers say, “This product is awesome!” 🙌Mark loved the look and layout of t...
09/15/2026

Nothing makes us happier than hearing our customers say, “This product is awesome!” 🙌

Mark loved the look and layout of the beams, and we loved seeing this project come together!

📍 Shell Lake, WI | 24’ × 39’ Shop/Garage | 2½ days of assembly

That’s the power of building with Enercept! 🏗️

✨ Chris’s Turn to Shine ✨ We appreciate Chris for always going the extra mile.
09/14/2026

✨ Chris’s Turn to Shine ✨

We appreciate Chris for always going the extra mile.

09/10/2026

It all starts with the process. 🏗️

Here’s a behind-the-scenes look at our team building jumbo panels by bonding OSB to foam—creating a strong, efficient panel ready for the next step in the build. 🔨

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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