4.1003.2 Pitched/Vaulted/Cathedralized Ceilings—Dense Pack Over

Topic: 
Attics
Subtopic: 
Attic Ceilings
Desired Outcome: 
Insulation reduces heat transfer through ceiling and closed attic sections as well as framing cavities inaccessible to other treatments
For supporting material, see Calculation of the Infiltration Credit and Referenced Standards.
TitleSpecification(s)Objective(s)
4.1003.2a
Fill slant ceilings

Using fill tube, 100% of each cavity will be filled to a consistent density:

  • Cellulose material will be installed to a minimum density of 3.5 pounds per cubic foot
  • Loose fiberglass material will be installed and will be specifically approved for air flow resistance per manufacturer's recommendation

The number of bags installed will be confirmed and will match the number required on the coverage chart

Insulation will be verified to prevent visible air movement at 50 pascals of pressure difference using chemical smoke, IR scans, or other approved verification method.
 

Ensure complete and consistent coverage throughout ceiling plane

Eliminate voids and settling

Minimize framing cavity air flows
4.1003.2b
Onsite documentation

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