Atlas Radiant Barriers: Airflow and Vapor Permeability Matter
Bulletin date: not stated in source
Atlas distinguishes acceptable under-deck radiant-barrier arrangements from barriers that trap moisture or sit directly beneath the shingles. Its guidance addresses perforated panels, ventilation paths and coating permeability
Atlas technical bulletin: Radiant Barriers in Shingle Roof Assemblies.
What this means for your roof
Atlas distinguishes acceptable under-deck radiant-barrier arrangements from barriers that trap moisture or sit directly beneath the shingles. Its guidance addresses perforated panels, ventilation paths and coating permeability. A reflective surface alone does not establish compatibility with the roof assembly.
A useful question for your contractor
Does the selected barrier preserve the required ventilation and drying path?
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin dated: not stated in source. The date shown identifies the manufacturer document used for this summary.
Read Atlas: Radiant Barriers in Shingle Roof Assemblies
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.