For supply & installation of Sound Dampner 1218 x 1218 x 12 mm STC of 37.
Providing and Fixing of Sound Dampner 12 mm 1218 x 1218 mm made of 10 mm compressed wood fibre cement composites 3 1250Kg/m and 2 mm dampner sheet. (37 STC as per IS : 9901-lll/ISO: 140-3/ASTM 90/413). To be installed directly
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