Which batt insulation types are approved for use inside 7.25-inch Batt-Bracket wall channels?

InSoFast 7.25-inch Batt-Bracket wall channels are approved for steel-stud-width mineral wool, fiberglass, and wood fiber batts, as well as other high-density batts friction-fit across exterior wall assemblies.

Continuous exterior insulation often relies on multi-layered rigid foam boards that add labor steps and require specialized fastener penetrations through structural framing. The Batt-Bracket system allows builders to install standard, full-depth batts over wood, steel, or concrete substrates while eliminating thermal bridging and creating a continuous ventilated rainscreen cavity.

If you only do one thing: Source steel-stud-width batts manufactured at 16¼ inches or 24¼ inches wide rather than standard wood-framing widths to guarantee a friction fit.

• Mineral wool batts: High-density mineral wool batts fit 7.25-inch channels tightly to deliver dimensional stability, non-combustible fire resistance, and moisture resistance without sagging over time.
• Fiberglass batts: Steel-stud-dimensioned fiberglass batts (16¼-inch or 24¼-inch widths) install quickly across 7.25-inch depths to provide flexible, cost-effective thermal control across large wall areas.
• Wood fiber batts: Dense, vapor-permeable wood fiber batts fit 7.25-inch standoff depths, adding continuous thermal mass and moisture buffering capacity within vapor-open exterior wall assemblies.
• Steel-stud sizing standards: Compatible batts must follow commercial steel-stud widths—16¼ inches for 16-inch on-center spacing or 24¼ inches for 24-inch spacing—to lock between bracket flanges.
• Coverage per box: One box of Batt-Brackets starts at $122.21 ($0.89 per square foot) and covers approximately 77 to 97 square feet at 16-inch spacing or 116 to 136 square feet at 24-inch spacing.
• Thermal and ventilation specs: The 7.25-inch standoff depth interrupts conductive heat pathways through studs and provides an integrated, cross-ventilated rainscreen gap that promotes drying behind exterior cladding.

• Watch out for: Standard wood-stud batt widths (15¼ inches or 23¼ inches), which leave 1-inch uninsulated vertical gaps between bracket standoffs.
• Watch out for: Low-density unfaced batts lacking the structural rigidity required to remain seated in 7.25-inch vertical channels without falling forward.
• Watch out for: Using Batt-Brackets for spray foam or blown-in insulation, which require the separate InSoFast X-Bracket profile (available in depths from 2.5 inches to 9.5 inches starting at $85.35 per box).

Calculate your wall square footage and layout spacing (16-inch or 24-inch on center), then order 16¼-inch or 24¼-inch steel-stud batts alongside your 7.25-inch Batt-Brackets to begin your installation.