4.1301.7 Pier Construction Subfloor Insulation—Loose Fill with Rigid Barrier

Topic: 
Floors
Subtopic: 
Accessible Floors
Desired Outcome: 
Consistent, uniform thermal barrier between conditioned and unconditioned space to prescribed R-value of an adjoining insulated assembly
TitleSpecification(s)Objective(s)
4.1301.7a
Subfloor preparation

Sealing between house and crawl space will be completed before insulating

Prevent air leakage
4.1301.7b
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, providing 100% coverage of the floor assembly

Seams and penetrations will be sealed

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

4.1301.7c
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 according to manufacturer specifications

Insulation will be installed to prescribed R-value

Insulate to prescribed R-value
4.1301.7d
Occupant 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