If you're interested in secondary double glazing please contact us and we will provide you with cost estimate. Secondary glazing can open in a selection of ways such as horizontal or vertical sliders and hinge units to supply you with easy access. It can provide a number of benefits. It allows the owner to enhance acoustic and thermal insulation without any structural changes or changing the look of the building from the outside, a key concern of most building managers. Perhaps secondary double glazing is the solution for you.