BuildBlock ICF
4″-8″

BuildLock KnockDown ICF

The BuildLock Knockdown ICF System is a high-performance knock-down insulating concrete form (ICF) wall system.

BuildBlock Knockdown ICF System is a patented ICF building system that uses interlocking EPS foam blocks to create a formwork for reinforced concrete walls. The unique feature of the Knockdown ICF System is that forms ship flat in bundles and the appropriate bridges are then used to create the needed form core size.

Easy assembly of the forms onsite makes it ideal for structures that require thick or multiple core sizes. Installation is quick and efficient.

The Knockdown ICF System’s interlocking design allows for a tight and secure formwork for the concrete, which includes internal webs connecting a continuous insulation layer to eliminate thermal bridging and air leaks. The system also includes a snap-in plastic connector that holds the blocks together, making the assembly process fast and straightforward.

The reinforced concrete is poured into the formwork, creating a solid and durable wall system. The concrete core provides excellent resistance to wind, debris, and other natural disasters, making Knockdown ICFs a popular choice for construction in areas prone to severe weather events.

The insulation properties of the EPS foam in the formwork provide superior energy efficiency and can reduce heating and cooling costs by up to 50%. The tight fit of the formwork also offers excellent sound insulation properties, making Knockdown ICFs ideal for structures where noise is a concern.

The use of Knockdown ICFs offers a range of benefits, including ease of assembly and disassembly, versatility in design, and environmental responsibility. The EPS foam used in the formwork is recyclable, and the long-term energy savings of Knockdown ICFs can help reduce a building’s carbon footprint. Additionally, the customizable design of Knockdown ICFs allows for flexibility in construction, making it possible to build a variety of structures, from temporary housing to permanent commercial buildings.

The BuildLock Knockdown Insulating Concrete Forms is a system that is comprised of two separate 2½ inch Expanded Polystyrene (EPS) panels which are connected by strong, high-density plastic webs on 6-inch centers. BuildLock is the strongest knock-down product on the market today. 

Each web bridge features a 3-axis positive locking attachment that snaps the web securely in the proper position to eliminate racking and provide superior structural stability throughout the construction process. The BuildLock Knockdown block exceeds even the superior strength of BuildBlock ICF blocks.

BuildLock KD combine strength and speed for a more efficient ICF knockdown system.
The BuildLock Knockdown System makes it easier and cost effective to get large core forms to your jobsite and easily create any size concrete core you need.

Why BuildLock Knockdown?

  • Available in 4”, 6”, 8”, 10”, 12” or greater core widths.
  • BuildLock’s patented web is the strongest web on the market.
  • Double-reinforced corner webs on 10” and 12” forms for safer pours and more attachment points.
  • Expandable core for larger sizes (24”+) with optional bridge connectors.
  • Blocks ship flat to reduce shipping costs when shipping overseas and increase product storage capacity.
  • Larger rebar saddles for multiple rebar sizes.
  • Reinforced web flanges for additional strength.
  • Simple, quick on-site assembly.
  • Completely reversible webs for multiple rebar locations and 8” horizontal spacing.
  • Connect multiple webs for special construction needs such as pilasters.
  • Use BuildBlock Hardwall to create an ICF wall with bare concrete on one side.

Knockdown Advantages

  • Commercial ICF block for projects requiring 4” to 12”+ concrete cores.
  • Patented strongest ICF web design on 6” centers.
  • Build 4”-24”+ walls using optional bridge clip connector.
  • Integrate pilasters into ICF walls.
  • Create insulated footings and foundations.
  • Designed to easily allow 8” horizontal rebar spacing in large commercial projects.
  • Tilt-up & retrofit insulation applications.
  • On-site assembly for integration of pre-set penetrations such as blast-proof door and window frames.

BuildLock Benefits

  • Fully reversible blocks and webs.
  • Numbered vertical cut lines every
  • 1-inch and horizontal cut lines every 2-inches.
  • Tight interlocking blocks with 100% surface-to-surface connections eliminating costly ties and accessories.
  • High-Density Plastic Webs with 2 Extra Heavy Duty Attachment Points (450lb.+ pullout) on each web.
  • Form and insulate in one step and use any finish application including BuildBlock Hardwall.
  • 4-hour fire rating and low sound transmission.
  • Fully integrates with all other BuildBlock ICF Products.

See ICFs in action & learn more about building with icfs!

BuildLock Features the Best Corner Web on the Market

Reversible corners for left or right stacking; longer length in both directions eliminates the need for additional strapping during installation and concrete pour saving time and labor as well as many additional attachment points.

Standard BuildBlock Features:

  • Webs on 6-inch centers
  • Fully reversible blocks and webs
  • Numbered and marked 1” cut lines
  • Molded-in horizontal cut-lines every 2 inches
  • Strong interlocking connectors
  • Easy electrical and plumbing installation
  • Form and insulate in one step
  • Allows for any type of finish application
  • Lowers sound transmission
  • Contributes to high thermal insulation values resulting in reduced energy costs
  • All BuildBlock products meet or exceed industry standards

The webs also serve as furring strips for interior and exterior finishes with a pull-out strength of 150 lbs. These furring strips include hardpoints with a pull-out strength of more than 450 lbs. and are easily identified by molded-in markings on both sides of the form.

Form
(Height 16 in)
CoreWidthLength
Ext – Int
Return
Ext – Int
AreaConcrete
Volume
R-Value
Perf. R-Value

BuildLock Knockdown Product Family

BuildLock Knockdown Straight

4 in
101.6 mm

9 in
228.6 mm

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.065844 yd3
.050341 m3

R-22
R-45-55

6 in
152.4 mm

11 in
279.4 mm

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.098765 yd3
.07551 m3

R-22
R-45-55

8 in
203.2 mm

13 in
330.2 mm

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.131687 yd3
.100682 m3

R-22
R-45-55

10 in
254 mm

15 in
381 mm

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.164609 yd3
.125852 m3

R-22
R-45-55

12 in
304.8 mm

17 in
431.8 mm

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.197529 yd3
.151022 m3

R-22
R-45-55

BL1090 High Side

BuildLock Knockdown 90° Corner

10 in
254 mm

15 in
381 mm

37 in – 22 in
939.8 mm– 558.8 mm

25 in – 10 in
635 mm – 254 mm

Exterior
6.88 ft2
.6391m2

Interior
3.56 ft2
.3307 m2

.151444 yd3
.115787 m3

R-22
R-45-55

12 in
304.8 mm

17 in
431.8 mm

39 in – 22 in
990.6 mm – 558.8 mm

27 in – 10 in
685.8 mm – 254 mm

Exterior
7.33 ft2
.6809 m2

Interior
3.56 ft2
.3307 m2

.191408 yd3
.146341 m3

R-22
R-45-55

bb6BL-end-oblique

Brickledge

4 in
101.6 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.111729 yd3
.077377 m3

R-22
R-45-55

6 in
152.4 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.134140 yd3
.102557 m3

R-22
R-45-55

8 in
203.2 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.167074 yd3
.127737 m3

R-22
R-45-55

10 in
254 mm
 N/A48 in
1219.2 mm
 n/a5.33 ft2
.4951 m2
.200008 yd3
.152917 m3
 R-22
R-45-55
12 in
304.8 mm 
 N/A 48 in
1219.2 mm
n/a5.33 ft2
.4951 m2
.232942 yd3
.178097 m3
 R-22
R-45-55

bb6DT-end-oblique

Double Taper Top

4 in
152.4 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.130128 yd3
.099489 m3

R-22
R-45-55

6 in
152.4 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.130128 yd3
.099489 m3

R-22
R-45-55

8 in
203.2 mm

N/A

48 in
1219.2 mm

n/a

5.33 ft2
.4951 m2

.163050 yd3
.124660 m3

R-22
R-45-55

10 in
254 mm
 N/A 48 in
1219.2 mm
 n/a5.33 ft2
.4951 m2
.195972 yd3
.149831 m3
R-22
R-45-55
12 in
304.8 mm
 N/A 48 in
1219.2 mm
 n/a 5.33 ft2
.4951 m2
.228894 yd3
.175002 m3
 R-22
R-45-55

BuildLock Knockdown Straight Block Forms

Core
Volume
Length
Area
Concrete Width
4 in / 101.6 mm
9 in / 228.6 mm
48 in / 1219.2 mm
5.33 ft2 / .4951 m2
6 in / 152.4 mm
11 in / 279.4 mm
48 in / 1219.2 mm
5.33 ft2 / .4951 m2
.098765 yd3 / .07551 m3
8 in / 203.2 mm
13 in / 330.2 mm
48 in / 1219.2 mm
5.33 ft2 / .4951 m2
.131687 yd3 / .100682 m3
10 in / 254 mm
15 in / 381 mm
48 in / 1219.2 mm
5.33 ft2 / .4951 m2
.164609 yd3 / .125852 m3
12 in / 304.8 mm
17 in / 431.8 mm
48 in / 1219.2 mm
5.33 ft2 / .4951 m2
.197529 yd3 / .151022 m3

BuildLock Knockdown 90° Corner Block Forms

Core
Width
Length Ext-Int
Return Ext-Int
Area
Concrete Volume
10 in / 254 mm
15 in / 381 mm
37 in – 22 in / 939.8 mm– 558.8 mm
25 in – 10 in / 635 mm – 254 mm
6.88 ft2 / .6391 m2
.151444 yd3 / .115787 m3
12 in / 304.8 mm
17 in / 431.8 mm
39 in – 22 in / 990.6 mm – 558.8 mm
27 in – 10 in / 685.8 mm – 254 mm
7.33 ft2 / .68097 m2
.191408 yd3 / .146341 m3
NOTE: 4in–8in corners use existing dedicated BuildBlock corners.

BuildLock Knockdown Brickledge Forms

Core
Width
Length Ext-Int
Return Ext-Int
Area
Concrete Volume
10 in / 254 mm
15 in / 381 mm
37 in – 22 in / 939.8 mm– 558.8 mm
25 in – 10 in / 635 mm – 254 mm
6.88 ft2 / .6391 m2
.151444 yd3 / .115787 m3
12 in / 304.8 mm
17 in / 431.8 mm
39 in – 22 in / 990.6 mm – 558.8 mm
27 in – 10 in / 685.8 mm – 254 mm
7.33 ft2 / .68097 m2
.191408 yd3 / .146341 m3
NOTE: 4in–8in corners use existing dedicated BuildBlock corners.

BuildLock Knockdown Double Taper Top Forms

Core
Width
Length Ext-Int
Return Ext-Int
Area
Concrete Volume
10 in / 254 mm
15 in / 381 mm
37 in – 22 in / 939.8 mm– 558.8 mm
25 in – 10 in / 635 mm – 254 mm
6.88 ft2 / .6391 m2
.151444 yd3 / .115787 m3
12 in / 304.8 mm
17 in / 431.8 mm
39 in – 22 in / 990.6 mm – 558.8 mm
27 in – 10 in / 685.8 mm – 254 mm
7.33 ft2 / .68097 m2
.191408 yd3 / .146341 m3

NOTE: 4in–8in corners use existing dedicated BuildBlock corners.

BuildBlock Knockdown Brochure
Learn about the strongest ICF knockdown product on the market today. The BuildLock Knockdown brochure …
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