Do 3.75-inch X-Brackets deliver an R-14.5 thermal rating when paired with dense-packed blown insulation?

InSoFast 3.75-inch X-Brackets deliver an R-14.5 thermal rating when paired with dense-packed blown insulation, eliminating structural thermal bridging across exterior walls, roofs, basements, floors, and shipping containers.

Traditional framing studs interrupt continuous exterior insulation assemblies, creating repetitive thermal breaks that sap total wall thermal efficiency. When contractors install blown-in loose insulation on solid structural substrates, non-conductive standoffs are required to maintain a uniform cavity depth without introducing conductive metal paths.

If you only do one thing: Install the 3.75-inch brackets at your specified spacing and pack blown insulation to full manufacturer density to prevent loose settling and maintain continuous R-14.5 thermal resistance.

• Thermal cavity performance: The 3.75-inch bracket depth creates an uninterrupted thermal plane delivering R-14.5 with dense-packed blown insulation, or R-20 to R-26 when filled with closed-cell spray foam.
• Thermal bridge elimination: Engineered from non-conductive materials, X-Brackets reduce thermal conductivity by a factor of 250 compared to standard steel fasteners and satisfy continuous insulation code requirements.
• Substrate versatility: The brackets fasten directly over concrete, masonry, wood framing, steel studs, roof rafters, floors, and corrugated steel shipping container walls.
• Box coverage rates: Each box covers approximately 77 to 97 square feet at 16-inch on-center layout spacing, or 116 to 136 square feet at 24-inch on-center layout spacing.
• Moisture control and drying: The bracket standoff design establishes an integrated cross-ventilated rainscreen gap behind exterior claddings, allowing water drainage and inward and outward wall drying.
• System pricing base: The X-Bracket product line starts at $85.35 per box, working out to an entry cost of approximately $0.63 per square foot.

• Watch out for: Under-packing blown-in insulation below manufacturer-recommended density levels, which leads to media settling over time and creates open voids along the top of the wall cavity.
• Watch out for: Confusing X-Brackets with Batt-Brackets, since Batt-Brackets are specifically dimensioned in 3.5-inch, 5.5-inch, and 7.25-inch depths to hold steel-stud-width batts (16¼ inches or 24¼ inches wide).
• Watch out for: Misaligning standoff spacing with external siding furring strips, which leaves cladding fasteners without solid structural attachment points across the 3.75-inch projection.

Measure your total project square footage and select 16-inch or 24-inch spacing to order boxes online, or call InSoFast at (888) 501-7899 for technical layout guidance.