4.1301.13 Pier Construction Subfloor Insulation—Loose Fill with Rigid BarrierTopic: Floors

Topic: 
Floors
Subtopic: 
Accessible Floors
Desired Outcome: 
Maintain a consistent, uniform thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow between conditioned and unconditioned space to prescribed R-value of an adjoining insulated assembly
TitleSpecification(s)Objective(s)
4.1301.13a
Subfloor preparation

Sealing between conditioned space and crawl space will be completed before insulating

Prevent air leakage

4.1301.13b
Rigid air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary

A rigid air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary will be mechanically fastened to underside of floor assembly

Seams and penetrations will be sealed

Rigid barrier will be resistant to pests

At minimum, all gaps larger than 1/4" x 1/4" will be stuffed with copper metal mesh or other rodent-proof material

If rodents can easily get their mouth around corners, they will be reinforced with hardware cloth or metal angle (e.g., gypsum board bead)

Relocate air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary

4.1301.13c
Installation

Loose-fill insulation will be installed between air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary and subfloor in accordance with manufacturer specifications to achieve required density, maintain consistent coverage, and achieve specified R-value

Insulation will be installed to prescribed R-value

Insulate to prescribed R-value

4.1301.13d
Building operations staff education

A dated receipt signed by the installer will be provided that includes:

  • Insulation type
  • Coverage area
  • R-value
  • Installed thickness and minimum settled thickness
  • Number of bags installed in accordance with manufacturer specifications
  • Document job completion to contract specifications

    Confirm amount of insulation installed

    Ensure ability to match bags required for total area completed

    Comply with 16 CFR 460.17