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Old 22nd July 2010
  #1
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QRD with unfaced or FRK-faced OC703 beneath wells

Many DIY put OC703 beneath the wells of a QRD.

Questions:
1. Should the OC703 be faced with FRK or unfaced?

2. Could one use Armstrong 403a acoustic ceiling panels (made of OC701 or OC703) faced with a white plastic instead of the OC703 and use the white plastic instead of FRK if your answer to #1 was that it should be faced with FRK.