4.1003.3 Unvented Flat Roof with Existing Insulation

Topic: 
Attics
Subtopic: 
Attic Ceilings
For supporting material, see Building America Solution Center.
Desired Outcome: 
Insulation reduces heat flow through unvented roof
TitleSpecification(s)Objective(s)
4.1003.3a
Ventilation

Code compliant ventilation will be installed before insulation

Reduce possibility of moisture issues

4.1003.3b
Installation

Roof cavities will be blown with loose fill insulation (or roof cavities will be dense packed with insulation) without gaps, voids, compressions, misalignments, or wind intrusions

Insulation will be installed to prescribed R-value

Insulate to prescribed R-value

4.1003.3c
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