What depth in inches are the pre-formed horizontal electrical chases embedded inside continuous foam panels?

InSoFast expanded polystyrene continuous insulation panels feature pre-formed electrical raceway channels molded at a depth of 3/4 inch into the foam body, running horizontally across the panel at standard heights.

Traditional basement and interior retrofits require building separate wood or steel stud walls just to route non-metallic sheathed cable, which consumes up to 4 inches of usable room perimeter. Combining continuous insulation with integrated wiring raceways eliminates add-on stud framing while maintaining proper installation clearances for residential electrical wiring.

If you only do one thing: Verify local electrical inspection requirements for non-metallic sheathed cable clearance before pulling wire through pre-formed foam raceways to ensure code compliance.

• Raceway dimensions: Horizontal and vertical wiring channels are factory-molded 3/4 inch deep by 3/4 inch wide directly into the 2.0-inch (UX 2.0) and 2.5-inch (EX 2.5) expanded polystyrene (EPS) panels.
• Horizontal channel placement: Channels run horizontally at 12 inches and 44 inches on center from the base of standard 2-foot by 4-foot panels, aligning directly with standard residential heights for electrical outlet boxes and wall switches.
• Vertical channel spacing: Vertical chases intersect the horizontal paths at 16-inch on-center intervals alongside the embedded polypropylene studs, allowing 12-gauge or 14-gauge cable to transition smoothly between floor levels and ceiling joists.
• Electrical box cutout depth: Standard single-gang shallow plastic boxes (1-1/4 inch to 2-inch depth) seat flush into openings cut directly into the foam with a standard utility knife or hot-knife cutter.
• Fastener protection: Embedded polypropylene studs provide a continuous 2-1/2-inch-wide fastening flange, preventing standard 1-5/8-inch drywall screws from contacting cables recessed within the 3/4-inch channel cores.

• Watch out for: Standard deep electrical gang boxes exceeding the panel thickness, which hit the masonry substrate and force drywall out of plumb unless the concrete is notched or shallow retrofit boxes are used.
• Watch out for: Using flexible metal fish tapes that gouge and snag the EPS channel walls; use flexible nylon pull rods to thread wiring through the runs.
• Watch out for: Leaving cable penetrations unsealed at exterior rim joists and corner terminations, which allows convective drafts into the raceway system.

Map out outlet and switch box locations across the foundation wall, aligning feeds with the 12-inch or 44-inch horizontal chase lines before hanging drywall. Consult a licensed electrician for specific junction box requirements and local electrical code approvals.