Based in North West London, T R I G L A S S specialise in the supply and installation of energy efficient windows and doors to clients throughout the London area. Their window range includes uPVC and aluminium double glazing, casement and sash windows, as well as a wide variety of front and back doors, including composite and patio doors. Established in 1982 the company has almost 30 years of experience in the Double Glazing Industry. All of their products are available on either a supply only basis, or installed by their fully experienced fitters.