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Cellulose insulation and the process of weatherizing and insulating a building involves a number of technical terms and concepts. We've compiled this glossary to help you decipher them.
[A] [B] [C] [D-E] [F-G] [H-I] [J-P] [Q-R] [S] [T] [U-Z] Loose-blown A term used to describe installation in an unrestrained space or cavity, such as in an attic, where cellulose would be loose-blown over the attic floor. NFPA The National Fire Protection Association Outgassing or Offgassing Particularly when referring to indoor air quality, is the slow release from a material, over a period of time, of a gas or chemical that was previously contained in or trapped in that material, either by design or use in the manufacturing process. Over-issue newsprint Over-issue or over-issued newsprint refers to newspapers that are printed but not purchased by consumers. For example, the Boston Globe may produce and distribute 1,000,000 newspapers on a given day, and have 250,000 returned unpurchased. These are over-issue newsprint and National Fiber purchases them in bulk for upcycling into cellulose insulation. Permeability A measurement used to determine how fast water vapor is able to move through the pores of a material. A material with a perm rating of less than one, as defined by ASTM E-96, is commonly referred to as a vapor barrier. |
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