WECU Underlayment

Sound Ratings

WECU IIC on Wood Joist – Light Weight Concrete Floor System *

TEST REFERENCE SUBFLOOR Susp. Ceiling WECU Floor Covering IIC
RAL-TL91-95 & RAL-IN91-3 1.5″ light wt. concrete on 5/8″ plywood NO Soundless+ (½”) Ceramic Tile 52
RAL-TL91-89 & RAL-IN91-4 1.5″ light wt. concrete on 5/8″ plywood YES Soundless+ (½”) Ceramic Tile 56
3013567-002A 1.5″ gypcrete on 5/8″ plywood NO Soundless (6mm) Wood 51
3138449CRT-002B 1 1/2″ lightweight concrete on 5/8″ plywood NO Silently+ (2mm) Laminate 55

WECU IIC on a 6″ Concrete Slab **

TEST REFERENCE SUBFLOOR Susp. Ceiling WECU Floor Covering IIC
J20011278-001 6″ CONCRETE YES Soundless (6mm) Ceramic Tile 56
CK8511.02A 6″ CONCRETE YES Soundless (6mm) Tile 56
J200114367-001 6″ CONCRETE YES Soundless+ (½”) Ceramic Tile 60
CK214.0211 6″ CONCRETE NO Soundless+ (½”) Ceramic Tile 53
CK214.0211 6″ CONCRETE YES Soundless+ (½”) Ceramic Tile 63
J20011278-001 6″ CONCRETE YES Soundless (6mm) Laminate 59
3013567-001A 6″ CONCRETE YES Crackless+ (3/64″) Laminate 58
3026189-001A 6″ CONCRETE NO Soundless (6mm) Laminate 50
J20011278-001 6″ CONCRETE YES Soundless (6mm) Wood 59
I-20581-0228 6″ CONCRETE NO Soundless (6mm) Hardwood 52
I-20580-0228 6″ CONCRETE YES Soundless (6mm) Hardwood 59

WECU Delta IIC on a 6″ Concrete Slab – No Suspended Ceiling

TEST REFERENCE SUBFLOOR WECU Floor Covering Delta IIC
3026189-004 6″ CONCRETE Soundless (6mm) Ceramic Tile 19
3026189-005 6″ CONCRETE Soundless+ (½”) Ceramic Tile 20
3026189-001B 6″ CONCRETE WECU (3.2mm) Laminate 26
3026189-002A 6″ CONCRETE Soundless (6mm) Wood 20
3026189-002C 6″ CONCRETE Soundless (½”) Wood 21

WECU Field Testing Data (FIIC)

TEST REFERENCE SUBFLOOR Susp. Ceiling WECU Floor Covering IIC
Cityfront Terrace 8″ CONCRETE NO Soundless+ (½”) Marble Tile 50
Comstock Apts. 6″ CONCRETE NO Soundless+ (½”) Hardwood 59
The Meridian 6″ CONCRETE YES Soundless+ (½”) Marble Tile 67
850 E. Ocean Blvd. 8″ CONCRETE NO WECU (1/8″) Laminate 59
850 E. Ocean Blvd. 8″ CONCRETE NO WECU (6mm) Hardwood 56
Standard Building Code 50 50 0

*Tests performed by Riverbank Acoustical laboratories in explicit conformity with ASTM Designations E90-90, E413-87, E492-90, E989-89 and E413-87.

**Tests using tile performed by Cedar Knolls Acoustical Labs in explicit conformity with ASTM Designations E492-86, E492-77, E989-84. Tests using hardwood Flooring, performed by Armstrong Acoustics Laboratory in explicit conformity with ASTM designations E989-89 and E492-90STC ratings based on tests performed on bare 6″ slab.

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