A larger glass area doesn’t make your door any less secure. Our glass is thermally toughened, making it incredibly difficult to break. We also use an internal glazing bead, so the glass cannot be removed from the outside. An anti-life security strip, prevents the door from being lifted out of the frame. With a 20mm gap between the panes, Low-E internal glass, weather resistant seals and trickle ventilation help retain the heat inside your home. Our patio doors are also fully insulated; the door panel engages into a channel in the outer frame to provide draught resistance.