Starting price per square foot for 3.5-inch Batt-Bracket systems

The InSoFast 3.5-inch Batt-Bracket system starts at $0.89 per square foot ($122.21 per box), providing a continuous insulation framing system designed for exterior wall and roof assemblies.

Exterior continuous insulation retrofits often introduce severe thermal bridging when standard wood furring or metal framing penetrates the thermal boundary. Building assemblies require non-conductive brackets that eliminate thermal breaks while creating a ventilated rainscreen cavity behind exterior cladding.

If you only do one thing: Pair 3.5-inch Batt-Brackets with 16¼-inch or 24¼-inch steel-stud-width high-density batts to maintain friction-fit retention without sag or compression.

• Unit pricing: Pricing starts at $122.21 per box, yielding an entry-level material cost of approximately $0.89 per square foot before fasteners and batt insulation.
• Box coverage: One box provides approximately 77 to 97 square feet of coverage at 16 inches on-center (O.C.) spacing, or 116 to 136 square feet at 24 inches O.C.
• Thermal performance: The 3.5-inch bracket depth accommodates mineral wool, fiberglass, or wood fiber batts to achieve thermal resistance values between R-13 and R-15.
• Batt dimensioning: Brackets require steel-stud-width batts measuring 16¼ inches or 24¼ inches wide rather than standard 15¼-inch or 23¼-inch wood-stud batts to span bracket flanges properly.
• Ventilation cavity: Built-in bracket standoff geometry creates a continuous, ventilated rainscreen gap across the 3.5-inch profile to drain incidental moisture behind siding.
• Substrate attachment: Brackets fasten through exterior sheathing into structural framing studs or solid masonry substrates at 16-inch or 24-inch intervals using code-approved fasteners.

• Watch out for: Using standard 15¼-inch wood-framing batts, which leave a 1-inch thermal gap; always install 16¼-inch steel-stud-width insulation batts.
• Watch out for: Fastening brackets off-layout, because bracket attachment points must align directly into underlying structural framing to support exterior cladding weight.
• Watch out for: Skipping the weather-resistive barrier (WRB), which must be detailed continuously beneath the bracket base across exterior wall assemblies.

Calculate total exterior wall square footage minus rough openings to determine box quantities at 16-inch or 24-inch spacing, then contact InSoFast at (888) 501-7899 for technical support or online ordering.

General information only, not medical advice. Decisions about health, treatment or wellbeing should be made with a doctor or other qualified healthcare professional.