TD Pre-Insulated Duct is a sandwich panel of polyurethane, sandwiched between aluminium sheets of varying thickness, smooth or embossed, with an anti-bacteria epoxy coating. Totally complies with the BCA (NCC). Works by hand or machine. Consistency in both density and panel thickness ensures consistent thermal properties throughout the board and reduces wastage.
The greatest benefit of the TD product is that the further you are away from a support mechanism, such as a sheet metal workshop, the more value the TD product becomes.