Replacing existing timber windows with new, double glazed windows is often promoted as a means of combating heat loss, draughts, dust ingress and providing perceived improvements to sound insulation and security. However research has shown that double glazed replacement of existing windows is not cost effective in comparison with other energy conservation measures.
We work with local manufacturers and can create stunning handmade bespoke replacement sash and case windows to suit all styles. We also supply and fit single, double and heritage double glazed windows in a range of beautiful paint finishes.
Replacement sash and case windows Stirling
In fact your existing windows can be upgraded at a lower cost to bring these benefits whilst still retaining the original features and style which give character to your home. The replacement of the panes of glass in existing multi-paned sashes with double glazed units is usually not possible. This is due to the narrow astragal and small glazing rebate dimensions of existing windows being incompatible with the technical requirements of double glazed units, which usually require a much larger rebate and a corresponding enlargement of astragal size.
As an alternative, secondary glazing, using side hung or horizontally or vertically sliding windows, can be fitted internally. Secondary glazing reduces heat loss and dust ingress and provides very good insulation against noise. Where the building is listed, this alteration would require consent from your Local Authority planning department.
Listed Building Consent
Plans to carry out any work that may change the appearance of windows in listed buildings will require listed building consent.
Works requiring listed building consent include plans to change:
- window frame material or operating method
- timber astragal (glazing bar) profile or the arrangement of panes
- glazing panes to double glazed units
- paint colour or finish
Plans to install secondary glazing or special ventilation arrangements are also likely to require listed building consent. Find out more about listed building consent.
Your home may be unlisted but within a conservation area where planning controls over window alterations are in effect. Your planning authority may also have planning policies controlling alterations to windows in other locations such as flatted properties or properties along important routes. These may include acceptable paint colours for external joinery.
Contact us now on 07710 096553 if you are looking for replacement timber sash and case windows.