Fox Buck (for windows/doors)

Core Width
Form Width
Surface Area
4.89 sq. ft.
4.89 sq. ft.
4.89 sq. ft.
Concreate Vol
0.00 cu. yd.
0.00 cu. yd.
0.00 cu. yd.
Price Per Block
$ 19.50
$ 20.00
$ 22.00

Product Specification

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 for weather events. The buck is exactly 2″ thick for easy measurements, and measures 48″ long to match the length of the three blocks. 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. The expanded 2015 Fox Buck product line now includes the 4″, 6″, 8″, 10″, and 12″ sizes.



Wind Resistance

Wind-rated to over 200mph

Fire Resistance

Up to 4-hour fire rating

Earthquake protection

Engineering available for all seismic zones

Moisture protection

Prohibits the growth of mold, mildew, and rot.

Sound Insulation

70% less sound transmission compared to wood frame

Heat Insulation

Between 40-70% in energy savings

Wondering what amount you need?

Using the calculator at,you can easily calculate the amount and types of ICF Block you need to complete your construction - whether that's an ICF basement or a whole new home.

Need help with your order?

For only $99.00 we will make a list of all the blocks you need.*
*Up to 2000 sqft.

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