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What R-Value
R-Value =
temp diff X area X time

heat loss
Really Means

Cellulose Insulation Provides Helps Control Fires

Cellulose Insulation has a Class 1 Fire rating. It is treated with fire retardants to meet all federal, state, and local fire safety requirements. The rating applies to the building assembly. Cellulose insulation flame spread and smoke development ratings Walls with cellulose insulation are one-hour (or greater) fire walls and can help control the spread of fire.

Cellulose insulation, as a Class 1 or Class A material, means it has a flame spread of 25 or less. It also has a very low smoke development index level.

When properly installed, cellulose insulation can help reduce the spread of flames in house and building fires. Some cellulose insulation manufacturers have even qualified two and three hour firewall designs using Cellulose Insulation.

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