The Way
High-Performance, Net-Zero Ready Structures

Building smarter, faster, and more sustainable

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Welcome to Preflex, the intersection of sustainability and efficiency in modern construction. Our ICC-certified Structural Insulated Panels (SIPs) are at the forefront of green building technology. Preflex's innovative panelized building systems offer more than just superior insulation and structural integrity; they're a testament to our commitment to environmental stewardship and value engineering. By integrating energy-saving features and state-of-the-art fabrication processes, our SIPs ensure faster build times, no waste, cost-effective solutions, and robust structures that stand the test of time. Explore Preflex SIPS today and join the revolution in sustainable construction that's redefining quality and performance.

What people are saying

"The SIPs are great to work with. We saved substantially on the labor cost. We're saving 18 - 30% in overall framing costs."
- Kelly Klute
"It's been a great experience working with the Preflex team."
-Terrell Martin
"We got this up in 5 days. It is nicely insulated, it has more R-Value than the average ADU."
-Andrew Ignacio

"Low-Cost, Energy-Efficient, Sustainable Buildings – Made Easier."

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Preflex Services



Interior & Exterior Sheathing


Structural Insulated Panels

Preflex SIPs are a revolutionary building system that consists of a solid core of expanded polystyrene (EPS) structurally laminated to 2 oriented strand board (OSB) skins.

The panels include framing, insulation, wire conduits, and sheathing in a single component; it's considered one of the most energy-efficient building systems on the market.

Preflex Panels are manufactured to the highest standards and are Code Compliant with Building Residential codes at the US Federal and California State levels for use as load bearing Walls, Roofs and Floors






Preflex SIPs are engineered for versatile application in walls, roofs, and floors, providing high R-Value and a hermetically sealed structure from floor to ceiling for optimal energy efficiency. Additionally, our Retro-Fit SIPs can be seamlessly integrated into existing structures, enhancing energy efficiency through innovative adaptation.





Preflex SIPs are meticulously engineered for a wide range of applications, including Residential, Multifamily, Accessory Dwelling Units (ADUs), and Commercial building projects. Utilizing advanced fabrication techniques these SIPs offer a tailored, versatile solution to meet specific structural requirements across various construction domains while resulting in a Net Zero ready high performance building.

Preflex Panels allow you to build faster, greener, and more efficiently, creating a higher-value build.


Faster Construction

Prefabricated panels can be deployed quickly, built in as little as one (1) day.

Material & Labor Savings

Off-site fabrication results in accurate material and labor costs with no overages.

Sustainable & Energy Efficient

Low carbon construction and superior insulation results in up to 50% energy savings.

Avoid Labor Shortages

Remove the need for skilled carpentry.

Zero Waste Production

All material and scrap from fabrication are either recycled or reused for another project eliminating fabrication and job site waste.

Increase Property Value

Increased Energy Efficiency reduces operating costs while increasing property valuation.

Healthy Home

No VOCs, Healthy Interior Air Quality


Our designs are minimalistic, modern, and flexible enough to customize to your own taste.

Included in your Kit

Preflex SIP Plan Sets

Preflex SIP Installation Manual

Pre-cut Preflex SIP walls (window & door cuts)

Pre-cut Preflex SIP roof

LVL Engineered Lumber for ridges

SIP Fasteners

Sealant to use during installation

High expansion foam for ridge and valley joints, as needed

Panel joint tape for roof seams

Green Construction

Reduce Energy Consumption by up to 50%

Healthier Indoor Environment

90% Less Waste On-Site

Any waste from manufacturing is either reused or recycled.

Earn Leed Points

Toward an Environment Certification and Crucial Tax Credits.

65% Less Timber

Than traditional building methods.

No Harmful Chemicals

No off-gassing or VOCs. No Wall Cavities for Mold growth.

Low Carbon Footprint

Reduce the carbon footprint by over a million lbs over the lifetime of the building.

Tight Envelope Continuous Insulation
Environmentally sustainable
1 days assembly with 4 installers: 700sqft
Engineering included
21 year limited warranty
Fixed cost
Zero on site waste
Stick Frame
Thermal bridging and air cavities
High carbon footprint
15 day framing with highly skilled carpinter: 700sqft
Engineering cost 6-8K
Floating Material cost estimates
Expensive change in order cost
Continues cleanup and trash hauling
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Pre-Designed Kits

Model 12

R 192ft²‍ | L 288ft²‍ | XL 384ft²

Model 16

R 542ft²‍ | L 640ft²‍ | XL 768ft²

Model 20

R 640ft²‍ | L 800ft²‍ | XL 960ft²

Model 24

R 768ft²‍ | L 960ft²‍ | XL 1152ft²

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