ICF Construction in 25 Steps Lessons Step 23: Electrical Installation

Step 23: Electrical Installation

The preferred code compliant method is to install electrical wires or conduit into a snug chase in the EPS foam on the face of the wall. The foam is 2.5-inches deep on each side of the wall.

Cut chases at least 2 to 2 ½ inches deep so the wire or conduit fits snugly and is a minimum of one and one-half inches from the wall face. This will ensure that screws cannot hit any electrical wires when sheetrock or other wall finishes are attached.

When this is not possible, a galvanized metal plate should be installed in front of the wire. Consult local codes for specific requirements. Lastly, securely spot glue the wire in place using spray foam adhesive.

Special electrical boxes are available for ICF blocks that mount securely in the foam. Standard boxes may also be mounted and anchored into the concrete wall itself by removing foam and using foam adhesive or tapcon screws to secure boxes completely in place. Boxes with a side flange may be attached to the BuildBlock web

It is recommended that electrical panels be mounted on the ICF wall and be furred out the depth of the panel. Typically this is a small area in a garage or mechanical room. If mounting directly to an ICF wall, a 15-minute thermal barrier must be installed. This can be accomplished by mounting on a 3/4 inch or greater plywood base attached to the ICF wall.

Electrical placed in ICF walls.
Step 23: Electrical wires can be chased directly into the foam of BuildBlock ICFs. Use a chainsaw, pruning saw, or knife to create chase. Wires fit snuggly in the chae and you can use foam adhesive to hold them in place.
Step 23: Electrical wires can be chased directly into the foam of BuildBlock ICFs. Use a chainsaw, pruning knife, or knife to create chases. Wires fit snuggly in the chase and you can use foam adhesive to hold them in place.