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Percolation Tests FAQs, answered by experts

Often found in old insulation, tiles, and roofing materials in pre-1980s buildings.

Many homeowners may never have to test their homes for asbestos. Asbestos particles are only dangerous if they become airborne. If you plan to do construction or notice damage to piping, siding, or drywall, you should hire a specialist to test for asbestos. 

If you plan to remodel your home or have any concerns, you should have your home tested for asbestos just to be safe.

Typical methods for asbestos removal include encapsulation, enclosure, and complete removal.

Costs depend on property size, test types, and additional services like mold sampling.

Vermiculite insulation that comes from a particular mine before 1990 is likely to contain asbestos. This is particularly true in the U.S. However, not all types of vermiculite insulation contain asbestos. Since you can't detect the presence of asbestos without special equipment, it's best to assume that the insulation contains the dangerous mineral and to either leave it alone or hire a professional to handle it.

The Janesville, CA homeowners’ guide to percolation testing services

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