Ceilings

Of particular concern to the NIBS–IEQ Products & Materials Committee are T-bar suspended ceilings used as return air plenums in buildings, because both sides of the panels come in contact with indoor air. In addition, penetrations for sprinklers, alarms, and smoke detectors may significantly increase the area exposed to emissions. Temperatures near ceiling surfaces and in return air plenums are usually higher than those in occupied zones and, as a result, increased emissions from ceiling materials may occur. The individual selecting ceiling materials should carefully consider the acoustic, fire, and aesthetic requirements for each space prior to material selection. Nonporous materials are now available that combine aesthetic, acoustical, and fire code requirements.

Ceiling materials that contain organic materials present the possibility of mold contamination if the ceiling system becomes wet. Porous ceilings and ceiling finishes can also act as receptors for toxins and VOCs that are brought into the building and later re-emit them. Many ceiling tile products are made using urea formaldehyde. No products using urea formaldehyde should be allowed.

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