A faster, easier, more affordable way to meet NFPA 13 requirements.

Once, NFPA 13 Standard only mandated the use of sprinklers in the interstitial spaces of multi-family construction projects. Now, code changes allow the substitution of insulation—and Inner-Safe™ Concealed Space Batt Insulation is the cost-effective way to fill interstitial spaces. It’s an innovative new alternative to sprinklers or blown-in insulation that meets and exceeds code, while installing quickly, easily and affordably.


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NFPA 13 Standard

The language above, excerpted from NFPA 13 Standard, highlights revised sections that address requirements for the filling of interstitial spaces. Note that non-combustible insulation is now permitted—and that the code allows a maximum two-inch air gap at the top of the space.

What Inner-Safe brings to the job

  • Satisfies a range of joist thicknesses from 8″ to 24″
  • Easier to estimate and allocate labor
  • Friction-fit into cavities—no fasteners or support needed
  • Same batt crews for walls and floor
  • Provides easier inspection, via a depth indicator on its packaging

Advantages over sprinklers

  • Inner-Safe requires no specialized labor or equipment to install
  • Eliminates long-term maintenance and inspection costs
  • Inner-Safe enhances thermal separation and noise reduction

Advantages over loose-fill and traditional batt insulation

  • Inner-Safe Concealed Space Batt Insulation requires no additional, specialized equipment on the jobsite
  • Eliminates additional labor needed with loose-fill installs
  • Inner-Safe installation costs are roughly half of a loose-fill application