What is the maximum R-Value that you can get when using the X-Bracket System with sprayfoam?

The maximum thermal resistance achievable with the InSoFast X-Bracket System using closed-cell spray foam is R-60, delivered by installing the largest 9.5-inch bracket depth across the building envelope.

Deep exterior retrofits and extreme cold climate builds in northern zones (IECC Climate Zones 6 through 8) struggle to meet high thermal envelope targets without creating structural thermal bridges or excessive wall weight. The bracket standoff system isolates framing while creating a cavity specifically sized for continuous spray foam or dense-pack fill.

If you only do one thing: Size your bracket depth to your regional code minimum plus a 10% thermal safety margin, stepping up to the 9.5-inch bracket whenever targeting R-50 to R-60 high-performance standards.

• 9.5-inch bracket thermal rating: Provides an insulation depth delivering R-50 to R-60 when filled with 2.0 lb/cu ft closed-cell polyurethane spray foam (foam plastic insulation with sealed cellular structure).
• 7.5-inch bracket thermal rating: Delivers an R-40 to R-47 rating, engineered for meeting Zone 7 and Zone 8 roof and exterior continuous wall insulation specifications.
• 5.5-inch bracket thermal rating: Produces R-30 to R-38 thermal resistance, commonly specified for above-grade commercial retrofits, exterior framing, and conditioned roof assemblies.
• 2.5-inch and 3.75-inch bracket tiers: Yield R-10 to R-17.5 for the 2.5-inch depth and R-20 to R-26 for the 3.75-inch depth, providing low-profile options for basements and shipping containers.
• Coverage and spacing rates: Covers approximately 77 to 97 square feet per box at 16-inch on-center layout, or 116 to 136 square feet per box at 24-inch on-center spacing.
• Thermal bridge elimination: Isolates outer strapping from the structural substrate, eliminating conductive heat loss through wood studs or steel framing members.

• Watch out for: Foam lift thickness limitations, as closed-cell spray foam must be applied in consecutive passes of 2 inches or less to prevent internal scorching and allow proper curing.
• Watch out for: Over-spraying past the bracket face, which requires labor-intensive trimming with a foam planer before attaching exterior furring strips or interior drywall.
• Watch out for: Fastener pull-out capacity on concrete or light-gauge steel substrates, requiring mechanical testing to confirm the bracket anchor carries the full cantilevered weight of thick foam assemblies.

Calculate your assembly's target R-value against local IECC climate requirements, then order the corresponding bracket depth starting from the 2.5-inch base model up to 9.5 inches.