Secondary glazing is an ideal solution for single glazed wooden windows, and we offer many different profiles and solutions. Secondary glazing is quite expensive, but if your windows are listed, and single glazed casements are your only option, this is the best solution. The benefits are better sound insulation and less heat loss which makes your house more energy efficent which offsets the price against heating bills. Also, less condensation which means less damp which also increases’s the life of your original wooden window.