• Protects Against Moisture Entry - Superior Asphalt Saturation for Improved Waterproofing
  
• Breathable Membrane - Allows for the Transmission of Air Vapor while Keeping Water Out
  
• Use Under Roof Shingles, Wood Shake, Tile & Other Primary Coverings
• Meets ASTM D4869
  

APOC organic felts are engineered with True-Breathe™ Technology, keeping rain and water on the outside of your home while allowing water vapor from cooking, cleaning, bathing and other sources to escape home entrapment. Tru-Breathe Technology helps prevent premature damage and rotting of your roof deck materials which can lead to unsafe structures and the development of mold. True-Breathe Technology is designed and manufactured to allow the transmission of air vapor while keeping water out.  Meets ASTM D4869 TYPE I. MEETS CGSB CAN2-51.32, & UL Classified.