Series 548 High Performance BI-FOLD DOORS
Sound Transmission Loss
Doors glazed with 6.38mm laminated glass rate 31dB(A) RW32.
Doors glazed with 20mm IGU made up of two layers of 5mm toughened glass slightly increases the rating to 32dB(A) RW33.
Doors were tested at the National Acoustics Laboratory, Chatswood, N.S.W.
