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Fox Blocks - Insulated Concrete Forms (ICFs)


Energy efficient:

The combination of insulation and the concrete core acts as a mass wall and blocks air infiltration, allowing buildings to save significantly on their heating and cooling costs.            


ICFs are a lightweight rigid foam insulation block. Walls can be designed tall, short, of varying thicknesses and with any curve or shape.

Fast build - lower cost:

You don't need additional air or vapor barriers or external insulation; and the stay-in-place insulation lets you place concrete in cold weather without additional heating or curing. A reduced construction schedule will move you into your more energy efficient building even sooner.

Superior Structures:

Structures build with ICFs are up to 25% stronger than other concrete walls, helping withstand earthquakes, hurricanes and tornadoes.


ICF products are made with recycled materials and can contribute LEED credits. They improve indoor air quality and emit no volatile organic compounds (VOCs).


The leading manufacturer of ICFs, provides you with the most efficient and profitable building envelope available.  Fox Blocks ICF buildings are energy-efficient, environmentally-friendly, sustainable, quiet and comfortable and give you superior results when compared to conventional building methods. An envelope that resists harmful mold, dust and allergens, along with powerful wind, storm and fire damage.


Fox Buck

Fox Buck is a fully integrated, continuous insulation window and door buck for residential and commercial applications. The 1" x 1" notches create a dual barrier against drafts or moisture penetration. When installed properly, the concrete barrier protection is continuous around the entire opening. These barriers also anchor the Fox Buck to the wall with enough strength to hold in most weather conditions.

The buck is exactly 2" thick for easy measurements, and measures 48" high to match the height of the three blocks. It can be used conjuction with the internal "Energy Sticks" as well.

The buck features a 1 1/2" wide "fastening zone" for door and window attachments that runs the full height of the buck every 8" on center. Notches ensure proper alignment between the buck and the wall form. On the inside, Dual full-length 1" x 1" grooves create a solid concrete barrier against drafts and moisture. Circles are marked at 16" centers for sill cutouts and vibrator access.

HV Clip

The HV Clip is engineered to be perfectly balanced to secure Fox Blocks together. The clip works horizontally or vertically to give flat walls post concrete. Using the Fox Block HV Clip eliminates the need for truss wire completely.

 Product Number Description Eps  L x W x H
FB FOX S600 6" Straight 2-5/8 inch 48 in x 11.25 in x 16 in
FB FOX EC690 6" Corner 2-5/8 inch 40 in x 24.00 in x 16 in
FB FOX S800 8" Straight 2-5/8 inch 48 in x 13.25 in x 16 in
FB FOX EC890 8" Corner 2-5/8 inch 40 in x 24.00 in x 16 in
FB FOX BUCK6 6" Fox Buck 2 inch 48 in x 11.25 in
FB FOX BUCK8 8" Fox Buck 2 inch 48 in x 11.25 in
FB FOX HVCLIPS Horizontal/
Vertical Clips
 250 / box