DECKfon Quattro 39 acoustic structural treatments are created to be laid on top of timber floor joists in a refurbishment timber floor application. The boards feature four high performance layers. Once installed the existing ceiling does not need to be replaced. DECKfon 37T will enhance acoustic performance for timber floors where the ceiling is to be replaced and DECKfon Quattro 39 & 45 for floors where the ceiling is to be retained. Made from a tongue and groove edge detail with a moisture resistant P5 chipboard.