Sprayed polyurethane foam insulation has the best R-value per inch compared to other insulating materials. Because it provides a higher R-value per inch, homeowners using this insulation can use 2x4 construction on exterior walls instead of 2x6 studs required with traditional insulation. This can save on framing costs as well as extended window and door jambs. This simple change can also increase the amount of living space as much as 35 square feet in a 1,500 square foot home. The equivalent of an extra closet.
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Examples of contaminated insulation:
• animal feces (associated with various diseases)
• mould (respiratory diseases)
• VERMICULITE REMOVAL
Examples of toxic insulation:
• asbestos insulation (associated with various lung diseases)
• Zonolite-vermiculite (can contain asbestos)
Prior to the 80’s, the product Zonolite was used as a popular attic insulation in approximately 35 million homes in North America. Zonolite (vermiculite) material is brownish in color and may contain metallic and gold looking flakes. It has been described as looking like pieces of popcorn.
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