The University of Edinburgh and Edinburgh World Heritage have published a new retrofitting guide for historic sash and case windows.
Sash and case windows are a common feature of older tenement buildings. While they are aesthetically pleasing, these windows are often single-glazed and prone to draughts. Retrofitting sash and case windows not only preserves a property’s cultural significance of but also improves its energy efficiency.
Although replacing sash windows with other types of windows is an option, it is worth taking the time to consider whether this is the best choice:
- Retaining existing timber windows is more sustainable and better for conservation.
- UPVC windows tend to decay more quickly than timber.
- Cheap window installations placed in existing frames can reduce light intake and decrease passive solar heating benefits.
A cheap uPVC window installation. Note the deep uPVC frame added to the depth of the old timber frame. Up to 10 square feet of daylight can be lost in a bay window of an older Victorian tenement. Less sunlight means less gain from solar heating.
This comprehensive guide outlines the steps to retrofit your sash windows, taking into account the condition of your property, existing issues with your windows, and your specific needs and requirements. It includes useful checklists to help you navigate the process effectively.
The guide also details key retrofitting principles and thoroughly explores the various options available for sash and case windows when it comes to retrofit.
