Ceiling And Attic Insulation: Installation Instructions

Boxes (electrical, smoke, CO, etc.)

Do: Cut and/or split insulation around wiring and boxes.

Ceiling Fan Boxes

Do: Cut and/or split insulation around wiring and boxes.

Recessed Lights (IC and ICAT rated only)

Do: Cut and/or split insulation around wiring and recessed lights and fit snugly to boxes. Notice: Recommend using ICAT rated.

Wires (electrical, cable, security, low voltage, etc.)

Do: Cut and/or split insulation around wiring and fit snugly to boxes and other obstructions.

Exhaust/Ventilation Fans

Do: Cut and/or split insulation around exhaust fan boxes, ductwork, wiring and any support bracing and fit snugly to boxes.

Ducts/Connectors

Do: Cut and/or split insulation around HVAC Boots and insulated ductwork and any support bracing.

Pipes (Water Supply, Plumbing Vents, etc.)

Do: Cut and/or split insulation around pipes

Notes:

The clearance between insulation and fossil-fuel appliances, chimneys, recessed lights and other hot surfaces must meet the requirements of the National Fire Protection Association (NFPA) and International Code Council (ICC) building codes, and the appliance manufacturers’ recommendations – whichever is most restrictive.

In general, when installing insulation in contact with or near hot surfaces:

Check the manufacturer’s instructions for equipment and appliances to determine any insulation requirements or restrictions.

Check the applicable building code for insulation clearance requirements. These are typically contained in the fire, building and mechanical codes. If there are any questions – consult your local building department for the applicable requirements.

Mineral fiber insulation (fiberglass, rock and slag wool) are noncombustible but may have flammable facings which cannot be used in hot applications. These insulations are also available with noncombustible facings and facings which have flame spread and smoke developed indices appropriate for most code requirements.

When it is permissible to insulate in hot applications, note that most fiberglass products used in building insulation melt at approximately 800 degrees F and rock wool products used to insulate buildings melt at approximately 1200 degrees F. Both fiberglass and rock wool materials are available which have higher melting temperatures.