Non-IC rated pot light housings are used in the same situations as the IC rated housings, only they require that there be no contact with insulation and at least 3 in (7.6 cm) spacing from insulation.
IC or “insulation contact” rated refers to the housing, or the fixture itself that is installed inside the ceiling and contains the lamp holder. IC housings must be installed wherever insulation will be in direct contact with the housing. If installing spray foam insulation the foam must remain a minimum of 1.5? away. Our process is to cover the pot light with fiberglass batts and spray foam over top.