Environmental

Urea-formaldehyde foam insulation (UFFI) was commonly used in homes built in the 1970s and is a concern because it:

ACorrodes plumbing and electrical systems
BCan outgas formaldehyde into interior air spaces✓ Correct
CContributes to radon accumulation
DHarbors mold more readily than other insulation types

Explanation

UFFI was banned for residential use in 1982 because it can outgas formaldehyde, an irritant and potential carcinogen, into the indoor air. Disclosure of UFFI in Massachusetts is required.

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