ul-stc ratings-matrix v6 160203 - prescientco.com€¦ · stc iic stc iic 57 70 57 55 stc iic ......

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Sound Ratings Wall Assembly UL W428 STC Prescient 1618 ga. metal studs with (2) layers of 5/8" Type X GWB, 3.5" batt insulation, 1/2" RC Deluxe 24" OC, and (1) layer of 5/8" Type X GWB 57 Floor/Ceiling Assembly UL G592* STC IIC STC IIC 57 70 57 55 STC IIC STC IIC 61 54 61 54 1" cementitious board on 18" deep Prescient trusses, 1/2" RC Deluxe 12" OC, (1) layer 5/8" Type C GWB *An underlayment is required with all floor finishes in order to reach code minimum IIC levels. Per IBC 1207.2, assemblies separating dwelling units must have STC and IIC ratings of not less than 50 (45 if field tested). STC & IIC ratings are based on field tests (ASTC & AIIC standards). VCT Vinyl Plank Carpet Hardwood

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Page 1: UL-STC Ratings-Matrix V6 160203 - prescientco.com€¦ · STC IIC STC IIC 57 70 57 55 STC IIC ... with all floor finishes in order to reach code minimum IIC levels. Per IBC 1207.2,

Sound RatingsWall Assembly ‐ UL W428 STC

Prescient 16‐18 ga. metal studs with (2) 

layers of 5/8" Type X GWB, 3.5" batt 

insulation, 1/2" RC Deluxe 24" OC, and (1) 

layer of 5/8" Type X GWB 

57

Floor/Ceiling Assembly ‐ UL G592*

STC IIC STC IIC

57 70 57 55

STC IIC STC IIC

61 54 61 54

1" cementitious board on 18" deep 

Prescient trusses, 1/2" RC Deluxe 12" OC, (1) 

layer 5/8" Type C GWB

 *An underlayment is required with all floor finishes in order to reach code minimum IIC levels.  Per IBC 1207.2, assemblies separating 

dwelling units must have STC and IIC ratings of not less than 50 (45 if field tested).  STC & IIC ratings are based on field tests (ASTC & AIIC 

standards).

VCT Vinyl Plank

Carpet Hardwood

Page 2: UL-STC Ratings-Matrix V6 160203 - prescientco.com€¦ · STC IIC STC IIC 57 70 57 55 STC IIC ... with all floor finishes in order to reach code minimum IIC levels. Per IBC 1207.2,