The Sigma Range is a continuously hidden hinged system offering a mid level acoustic performance.
With its concealed hinges, PPC profiles and FSB Handles all as standard, this system really is a market leader
With multiple fixed rubber sweep seals it can offer an acoustic insulation up to 45dB.
For added flexibility, or when there is no suitable structure to suspend from, the Sigma can be supplied as a bottom rolling option, running along a low profile floor track.