If you want to improve the energy efficiency of your sash windows, then there are a number of options available to you including sash window secondary glazing. Here are just some of the benefits of secondary window glazing for traditional timber windows in your period property.
Planning permission may not be required
If you live in a conservation area or your building is listed you may need to secure planning permission or listed building consent to carry out alterations to your windows. In these cases installing double-glazing for your sash windows may not be an option as this may alter the overall appearance of your property. However, permission may be granted, or may not be needed at all, for secondary glazing as this is generally viewed as a non-intrusive way to insulate historic windows.
As well as potentially being a cheaper option to double-glazing or replacing your sash windows altogether, secondary glazing could also slash the cost of your energy bills. According to the Energy Saving Trust adding secondary glazing to your windows could cut your annual fuel bills by a figure of £105. This saving could be particularly beneficial at a time when the cost of gas and electricity for consumers is continuing to climb upwards.
Windows can be a key culprit for heat loss if they are not properly insulated. As a result installing secondary glazing for your sash windows will help to improve thermal insulation, and reduce your reliance on gas and electricity to heat your home.
Installing secondary glazing to your sash windows can help to prevent the build-up of condensation. However, for best effect English Heritage recommends that it is important to afford a degree of ventilation to the air between the outer windows and the secondary glazing. They argue that this can be achieved by leaving the outer windows without draught proofing.