4.1004.4 Knee Wall Without Framing

Topic: 
Attics
Subtopic: 
Knee Walls
Desired Outcome: 
Consistent uniform thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow between the conditioned space and unconditioned space to prescribed R-value
TitleSpecification(s)Objective(s)
4.1004.4a
Sealing

Holes and penetrations will be sealed

Bypasses will be blocked and sealed

Prevent air leakage

4.1004.4b
Flat cavity present

Gap between framing and existing 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 insulated

Create a flat insulated surface

4.1004.4c
Installation

A rigid insulated sheathing will be mechanically fastened to code required R-value

Seams will be sealed

Insulate to prescribed R-value

4.1004.4d
Occupant education

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

  • Coverage area
  • Thickness
  • R-value

  • Document job completion to contract specifications

    Confirm amount of insulation installed

    Comply with 16 CFR 460.17