4.1088.2 Radiant Barrier

Topic: 
Attics
Subtopic: 
Special Considerations
For supporting material, see Building America Solution Center.
Desired Outcome: 
Radiant heat flow reduced
TitleSpecification(s)Objective(s)
4.1088.2a
Stapling

An air space no less than ¾" will be maintained between the barrier and the bottom of the roof deck

Ensure performance of radiant barrier

4.1088.2b
Ventilation

A minimum of 3" clearance from soffit vents and ridge vents will be maintained

Allow for air flow behind barrier

4.1088.2c
Gable walls

Radiant barrier will apply to gable walls while maintaining a ¾" air space

Radiant barrier will not block gable vents

Ensure performance of radiant barrier

4.1088.2d
Porch and garage attic spaces

Radiant barrier will be installed to separate the attic above conditioned space from adjacent attics

Radiant barrier will be installed to withstand local wind loads

Reduce radiant heat entry

Ensure durability

4.1088.2e
Onsite documentation
A dated receipt signed by the installer will be provided that includes:
  • Number and thickness of air spaces
  • R-value
  • Direction of heat flow

Document job completion to contract specifications

Comply with 16 CFR 460.17