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.
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When referring to cellulose insulation, 'fiberized' or 'fully fiberized' refers to the reduction of the paper raw material to the original state of long cellulose fibers, bearing no resemblance to the source material. Proper and complete fiberization is key to both the insulating and fire resistance capabilities (after the addition of mineral borate) of cellulose insulation.
Fire blocking refers to both the component and the process of installing a physical barrier, called a 'fire block' and typically made out of wood, in a cavity
, the purpose of which is to slow the progression of fire and/or flame in the event that a cavity is compromised during a fire. Fire blocking can be either eliminated or greatly reduced through the use of cellulose insulation, due to its inherent capability to prevent the spread of flames.
In construction, a firewall is a wall assembly
with a code-rated fire resistance intended to slow the spread of fire from one side to the other.
Greenwashing is a negative term and has a meaning similar to that of 'whitewashing'. It is most often used to describe efforts by corporations to portray themselves or their products as more environmentally friendly or responsible than is the actual case. From a marketing standpoint, it is considered an exaggeration of environmental benefit without discussing environmental downsides.
Refers to the paper making process in which 10% or more or the wood pulp is produced from mechanical means such as grinders.