- 1). Look for the brand name Zonolite. This type of insulation was made by W.R. Grace & Co. for many decades, using vermiculite that had been tainted with asbestos.
- 2). Contact the manufacturer, if you know who made it. The company name might be written on the insulation itself.
- 3). Note the appearance of the insulation. Asbestos insulation often looks like a cast used for broken bones, or, alternatively, like ridged paper covered with tape. Tainted vermiculite insulation looks like dark gray pebbles.
- 4). Consider the age of your home. If your home was built recently, you probably will not have asbestos insulation, as it has been phased out of new construction. Older homes still might contain the material, however.
- 5). Contact a certified professional to take a sample of the insulation material and test it for asbestos.
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