Batt Insulation Above Suspended Ceilings

The national electrical code prohibits installation of any insulation over or within 3 76 mm of recessed light fixtures unless approved insulated ceiling ic lighting fixtures are used.

Batt insulation above suspended ceilings.

The other is typically a wood frame structure with a truss roof kraft faced fg batts stapled between the lower truss chord and a suspended ceiling below. Begin working the strip of batt insulation above the ceiling grid and into the row you are working on keeping the backing faced down. Sonobatts and thermal batts may be used above suspended ceilings but not in areas with high inside relative humidities. Batt insulation above suspended ceilings have been used for years for sound control and is being used a little less in todays economy due to the improved stc ratings of drop in tiles that are available.

The space above suspended ceilings should not be vented to the outside. The surface burning characteristics of ecotouch insulation were derived from products tested in accordance with astm e84. These leak like crazy too and of course after a few years some insulation falls down poor stapling or gets disturbed by some tradesman or another and the problem gets worse. Acoustical ceiling batts are available unfaced and kraft faced without stapling tabs for installation on suspended ceilings.

Dropped ceiling grids are typically 2 foot by 2 foot or 2 foot by 4 foot so they accommodate standard 24 inch fiberglass insulation batts. It is available in thicknesses to 12 inches and r values up to r 38. Sit the insulation flush against the hanger wires so that there won t be any air space between neighboring strips of batting. Add the batt insulation.

For the best results use batts that have paper facing. In many commercial jobs however code officials approve insulation applications that do not conform to the prevailing building code. Sonobatts insulation is designed for use over ceiling panels in a suspended ceiling system. The batt insulation should be unfaced and can be of various thicknesses varying on the stc required.