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Resilient Construction

Build faster. Build stronger. Build smarter with CelBlox insulated concrete forms.

CelBlox manufactures insulated concrete forms (ICF) built for strength, efficiency, and dependable performance. CelBlox embedded studs are made from high-strength engineered Thermylene resin for greater durability and holding power than the competition's polypropylene nailing strips. Combined with our patented steel-pinned tri-folding hinge, CelBlox are designed to withstand jobsite conditions while shipping flat for lower freight costs and easier handling.

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Quality ICF Blocks

Each of our insulated concrete forms is available in 5 different concrete core sizes: 4", 6", 8", 10", 12".

Long x 16" Tall. Standard Straight ICF block with straight interlocking ridges along the top and bottom edges, black plastic ties spaced across the panel, and the CelBlox logo stamped on the foam face.

Standard Straight Block

48" Long x 16" Tall. 

From $28.95
48" Long x 16" Tall. Taper Top ICF block with one side of the top edge angled lower than the other for tapered wall transitions, straight interlocking ridges, black plastic ties, and the CelBlox logo printed on the panel.

Taper Top Block

48" Long x 16" Tall. 

Double sided Taper Tops available upon special request.

From $31.85

48" Long x 16" Tall. Brick Ledge ICF block with a stepped ledge line running across the top of the panel to support brick veneer, interlocking ridges, black plastic ties, and the CelBlox logo on the foam face.

Brick Ledge Block

48" Long x 16" Tall. 

Double sided Brick Ledge available upon special request. 



From $42.34


48" Outside Diameter x 16" Tall. 90° Corner ICF block molded into a right-angle L-shape with interlocking ridges on both legs, black plastic ties, and the CelBlox logo stamped on the panel.

90° Corner Block 

48" Outside Diameter x 16" Tall. 

From $32.95
48" Outside Diameter x 16" Tall. 45° Corner ICF block molded into a wide-angle bend for 45-degree wall corners, with interlocking ridges, black plastic ties, and the CelBlox logo on the foam face.

45° Corner Block

48" Outside diameter x 16" Tall. 

From $32.99

ICF Block Features


Our patented steel-pinned tri-folding hinge allows our blocks to fold flat for shipping across the USA while still retaining their strength.

All CelBlox products are manufactured to precise specifications. Download engineering specifications below:

CAD Files Detail Sheets


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Flat rectangular sheet of rigid closed-cell EPS under-slab insulation, 4' x 8' x 2", shown at an angle to display its thickness and beveled edge.

CELDECK® Under Slab Insulation 

4' x 8' x 2" Sheet of Closed Cell EPS Under-Slab Insulation. Available in any thickness up to 48”.

2lb Foam Density

From $28.99


Single black zigzag-shaped high tensile strength clip used to fasten CelBlox insulated concrete forms horizontally and vertically.

BLOX LOX®  HV Clip

Hight tensile strength HV Clip. For horizontal and vertical clipping.


From $0.80 Each or
$180 per box of 250



Why Builders Choose CelBlox:


Wisconsin-Based

Manufactured in Reedsburg, WI, and delivered throughout the USA, meaning lower freight costs that benefit your project.

Consistent Quality

CelBlox manufactures everything you need for insulated concrete form construction, including structural blocks themselves, reinforcement, fasteners, and bracing.

Technical Support

Engineers available with responsive service, faster delivery, and the security of a local manufacturer who understands your regional building codes and climate.

Why Build with ICF Blocks

Our insulated concrete form system cuts construction time by up to 30% compared to traditional methods. A team of 2-3 workers can build an ICF wall in 48 hours as opposed to 2-3 weeks. And the concrete core creates walls so strong they withstand 200+ mph winds, earn 4-hour fire ratings, and last 100+ years without rot, termites, or settling. From residential homes to multi-story commercial buildings, ICF construction delivers superior insulation, exceptional indoor comfort, and unmatched disaster resilience.


Strength

We manufacture the strongest ICF blocks on the market using the highest quality materials for secure installation.

A worker in a red shirt installs and levels white CelBlox ICF blocks at a wall corner, showing the interlocking ridges near a window opening.

Affordability

ICF construction reduces total project cost through faster building, lower labor expenses, and long-term energy savings.

A residential development under construction with several white CelBlox ICF homes going up, materials covered by a blue tarp in the foreground, on a snow-dusted lot.

Efficiency

Precision manufacturing eliminates guesswork and ensures consistent, engineer-ready construction.

A finished home with a gray shingle roof and white CelBlox ICF walls, trees in the background.
Bundles of tan composite MST rebar rods stacked in the CelBlox Wisconsin warehouse beneath a yellow overhead crane.


MST Re-Bar

Over 4X Stronger than Steel.

Rust Proof.

75% Lighter than Steel.

High Performance in all Climates.

200+ Years Service Life.

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Technical diagram of an adjustable steel bracing post with a curved orange arrow illustrating how the ICF wall bracing is leveled and adjusted.


PlumWall® Bracing 

We are a proud distributor of PlumWall Bracing.

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Complete ICF System Bracing & Accessories

Our bracing and accessories are designed to work seamlessly with CelBlox ICF blocks, providing the structural support during concrete pour. Every product in our lineup is tested for compatibility, performance, and durability.

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Get a Free Estimate 

Reach out to our team and get a quote for ICF construction products.

Contact For Quote