4.1005.2 Accessible Floors—Loose Fill Installation

Topic: 
Attics
Subtopic: 
Attic Floors
Desired Outcome: 
Consistent, thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow between conditioned and unconditioned space controls the heat flow
TitleSpecification(s)Objective(s)
4.1005.2a
Preparation

Subfloor or drywall will be removed to access cavities as necessary, including inaccessible knee-wall attic floor spaces

Insulation will be adequately marked for depth a minimum of every 300 square feet of attic area, with measurement beginning at the 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

All electrical boxes will be flagged to be seen above the level of the insulation

Open electrical junctions will have covers installed

Insulation dams and enclosures will be installed as required

Access the workspace

Verify uniformity of insulation material

Provide location of electrical boxes for future servicing

Prevent an electrical hazard

4.1005.2b
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

Existence of 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 material in line with the knee walls will be installed or verified when dense packing

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 material will not bend, sag, or move once dense packed

Hold dense pack Dense pack The process of installing loose-fill insulation to reduce air flow and perform to a stated R-value in place

4.1005.2c
Installation

All insulation will be installed to the minimum unsettled depth and the maximum coverage per bag to reach a consistent depth for desired R-value indicated on the manufacturer's coverage chart.

Reduce heating and air conditioning costs

Improve comfort

Minimize noise

4.1005.2d
Onsite documentation

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

  • Insulation type
  • Coverage area
  • R-value
  • Installed thickness and settled thickness
  • Number of bags installed in accordance with manufacturer specification

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

4.1005.2e
Occupant education

Documentation of material and R-value will be provided to occupants

Provide occupant with documentation of installation