Weyerhaeuser Forest Balsam Wool Insulation

Balsam Wool Insulation was sold in the early part of the 20th century.  Balsam Wool Insulation was made from the following:

1. Wood Fiber

2. Liquid Fire Retardant impregnated into fiber (borax-based)

3. Asphaltic binder to maintain loft

4. Kraft paper backing

A dust mask is recommended for the wood dust and fine particulates if the insulation is to be removed/disturbed

Note:  Weyerhaeuser Balsam Wool Insulation does not and never has contained asbestos fibers. 


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