When used as a pipe or boiler wrap, the heat causes the asbestos to become increasingly fragile. Asbestos insulation that has not been disturbed is not considered a serious health threat. Under the Construction Safety Act of 1973, both the practice of spraying asbestos and using it for pipe and boiler wrap were prohibited. In the late 1960s and early 1970s, it was used extensively for residential and commercial insulation. ft.Īsbestos is an effective insulator against heat, cold, electricity and noise. Positive identification can only be done by laboratory testing. Colors and textures of UFFI vary, but it can be distinguished from other foam insulations by its crumbly structure and powdery residue. Formaldehyde gas is an irritant and may be carcinogenic (cancer causing). UFFI was banned in Canada in December 1980, because of suspected health hazards. Urea Formaldehyde foam insulation was used extensively as a residential insulation in the mid-1970s. They have the highest R-value, and are more expensive than most types. If applied on interior or exterior walls, they should be covered by at least a half inch drywall or plaster. Plastic Board Insulations are made from polystyrene, or polyurethane. It is used in block cavities in commercial construction. It is non-combustible, subject to moisture damage and relatively expensive. Vermiculite is a mineral substance made from mica It is available as loose fill and can be recognized by the small individual rectangular pieces.
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Though cellulose fiber is inexpensive, it will absorb water which will lead to deterioration.
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It is usually grey in color and is similar to lint from a dryer in texture.
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It is usually blown in, but can also be poured. installed.Ĭellulose Fiber is made from paper, finely shredded and treated with chemicals to make it somewhat resistant to moisture, fire rot and vermin. Like glass fiber insulation it resists fire and rot, and is less irritating to work with than glass. Mineral Fiber or Mineral Wool is similar to glass fiber except that rock or slag is used to form the wool like texture.
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During installation it is a skin irritant, and inhaling the small threads of glass fiber can affect the respiratory system. It is resistant to moisture, mildew, fungus, and vermin, and is generally considered non-combustible. It is available in blanket or batt form, as well as loose fill. Glass Fiber Insulation is one of the most common and is made from threads of glass and formaldehyde.