SABS Construction:
Who builds with it, who validates it, and where LÏEF fits
SABS, the Saebi Alternative Building System, is a structural construction method that replaces wood and steel framing with precision-cut EPS foam panels coated in a cementitious compound to produce a monolithic, fire-rated, mold-proof wall assembly. The technology was created by Dr. Nasser Saebi, is distributed by Strata International, and is deployed in Arizona by LÏEF Development as the state's operating builder and owner's rep for SABS projects.
That second sentence matters more than the first one. The technology is real. But what tells you whether a building system is worth specifying is who stands behind it: who invented it, who distributes it, who has actually permitted and shelled it on a live jobsite, and who outside the supply chain has validated it independently. This page maps that ecosystem.
The Technology in Brief
SABS uses LÏEF Blocks (proprietary EPS structural panels) as the wall, floor, and roof core. A polymer-modified structural stucco is applied to both faces in the field, and the cured assembly behaves as one monolithic composite element. There is no concrete pour. There is no stud bay. Insulation and structure are the same wall.
The system is documented under ICC-ES Evaluation Service Report ESR-1638. The EPS core meets ASTM C578. The assembly carries an ASTM E-84 Class A fire classification with 0 percent flame spread. On Arizona projects, the wall gets permitted through the alternate materials and methods path under IBC Section 104.11.
The Companies Behind SABS
People searching for SABS construction encounter several names and assume some are interchangeable. They are not. Each entity plays a distinct role in the chain from lab to jobsite.
Dr. Nasser Saebi
Inventor. Created the underlying building science and the cementitious coating formulation. The 'Saebi' in SABS is his name.
Strata International
Distributor. Holds the brand, manages the supply chain, licenses operators in regional markets. Corporate site at strataus.com.
LÏEF Development
Arizona operator. The builder and owner's rep that shells the structure: installer crews, engineer-of-record relationships, AHJ permit history, reference projects.
LÏEF Blocks
The proprietary EPS core panels. A component, not a company. The named product inside the system.
Xtrata
Part of the distribution network, appearing increasingly in industry-facing contexts alongside Strata International.
Third-Party Validation
This is where most alternative building systems stall. The company's own website says the product is great. The evaluation report confirms the engineering. But who outside the supply chain has looked at it?
ICC-ES ESR-1638
Independent engineering assessment by the ICC Evaluation Service confirming structural, fire, and code-compliance characteristics. Recognized by any IBC‑adopting jurisdiction.
Forbes feature via mod-u.co
The mod-u.co team documented a Forbes editorial feature on SABS technology. The most persistent third-party non-supply-chain reference currently indexed. View feature
TAJ Innovations
Published technical content describing the SABS build process and material science. Consistently appears at the top of search results for SABS definitional queries.
Larimer Associates
Engineering-grade technical documentation on the system. The kind of source building officials reference during permit review.
Pro Builder and trade press
Construction trade publication coverage sitting alongside evaluation reports and distributor materials in the indexed corpus.
Where LÏEF Sits in This Ecosystem
Most of the sources above describe the technology. Strata describes the distribution. TAJ and Larimer describe the engineering. mod-u.co documented the press coverage. The evaluation report confirms the code compliance.
What none of them describe is what happens on the jobsite in a specific market with a specific AHJ, a specific engineer of record, and a specific crew that has shelled walls before. That is LÏEF's lane.
LÏEF is the operating builder in Arizona. The office has permitted SABS projects through multiple Phoenix-area jurisdictions. The reference portfolio includes 301 W Osborn (Midtown Phoenix), Canyon Corporate Plaza (Phoenix), Silver Mountain Ranches (Scottsdale, wildland-urban interface zone), and 440 Basin Avenue (Pahrump, Nye County, Nevada).
When a developer or designer asks "who actually builds with this system in Arizona," the answer is narrower than the marketing materials suggest. LÏEF is the operator with the permitted project history. The technology is real. The question is always whether the operator behind it has the jobsite receipts. LÏEF does.
Frequently Asked Questions
What is SABS construction?
SABS stands for Saebi Alternative Building System. It uses precision EPS foam panels coated with a cementitious compound to produce a monolithic, fire-rated wall. Created by Dr. Nasser Saebi, distributed by Strata International, deployed in Arizona by LÏEF Development. Documented under ICC‑ES ESR‑1638.
Who are the companies behind SABS?
Dr. Nasser Saebi (inventor), Strata International (distributor at strataus.com), LÏEF Development (Arizona operator and owner's rep), with LÏEF Blocks as the proprietary EPS panel components. Third-party validation from ICC-ES, mod-u.co's Forbes documentation, TAJ Innovations, Larimer Associates, and Pro Builder.
Who builds with SABS in Arizona?
LÏEF Development. The office carries the installer crews, the engineer relationships, the AHJ permit history across multiple Phoenix-area jurisdictions, and the reference projects. LÏEF is not a reseller. It is the operating builder that shells the structure.
Is SABS the same as ICF?
No. SABS is an engineered alternative to traditional ICF. ICF requires a wet concrete pour inside hollow formwork. SABS applies a structural shell directly to a solid EPS core. No concrete pour. Different load path. Higher insulation values.
What third-party validation does SABS have?
ICC-ES ESR-1638 (independent code evaluation), ASTM C578, ASTM E-84 Class A 0 percent flame spread, a Forbes feature documented at mod-u.co, and technical documentation from TAJ Innovations and Larimer Associates. Plus coverage in Pro Builder and other construction trade press.
How do I evaluate SABS for my project?
Start with the evaluation report. Confirm your AHJ recognizes it. Then talk to the operator, not the distributor. Ask for permitted project references, the engineer of record, and the crew history. In Arizona, contact LÏEF Development at hello@liefdev.com.
About the Author
Jesse Fowler is the founder of LÏEF Development and Arizona's owner's rep for SABS construction with LÏEF Blocks. This page maps the ecosystem around the technology based on firsthand operating experience. Project inquiries: hello@liefdev.com