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GLAZING ONLY <br />These STC values are for glazing only and do not necessarily represent the <br />window assemblies in which this glazing is used. <br />Monolithic STC <br />1/4" <br />1/2" <br />Laminated <br />31 <br />36 <br />1/8"-0.030"-1/8" 35 <br />1/4"-0.030"-1/8" 36 <br />3/8"-0.030"-1/4" 40 <br />Insulating <br />1/8"-1/4" AS*-1/8" 28 <br />1/4"-1/2" AS*-1/4" 35 <br />1/4"-1" AS*-1/4" 37 <br />3/16"-4" AS*-3/16" 44 <br />Laminated Insulating <br />1/4" Laminated-3/8" AS*-3/16" 37 <br />1/4" Laminated-1/2" AS*-3/16" 39 <br />1/4" Laminated-1" AS*-3/16" 42 <br />1/4" Laminated-2" AS*-3/16" 45 <br />1/2" Laminated-2" AS*-3/16" 46 <br />1/2" Laminated-4" AS*-3/16" 49 <br />Double -Laminated Insulating <br />1/4" Laminated-1/2" AS*-1/4" Laminated 42 <br />1/2" Laminated-1" AS*-1/4" Laminated 46 <br />1/2" Laminated-4" AS*-1/2" Laminated 50 <br />*AS - air space <br />Source: Acoustical Glazing Design Guide, Monsanto Chemical Company <br />12 <br />