Acoustical tile is a familiar sight in homes and public buildings. As with a cottage-cheese ceiling, this fibrous or Styrofoam-based material is great at absorbing sound — along with dust, dirt, grease and smoke.
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Dirt can be removed by using a
dry sponge, either clamped to a pole or hand-held from a ladder. As the
sponge reaches capacity in one spot, switch to a cleaner part of the sponge, then toss it out when it’s dirty all around. Grease, oil and/or smoke can be removed by the same bleaching method described in the acoustical popcorn entry, above. Fiber-type ceilings cannot be washed wet, since the tiles will suck up the water and cleaning agent along with the soils you’re seeking to remove. These ceilings can be painted, but again, this is done at the expense of the materials’ acoustic properties.
Reference:
Don Aslett in The Cleaning Encyclopedia: Your A to Z Illustrated Guide to Cleaning Like the Pros.
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