Sash windows are one of the important parts of the heritage of many of our towns. Many buildings have a character which is dependent on the retention of the building's original features such as these elegant windows. Retaining original features is more than just a matter of taste, it can also make good economic sense. Period windows were often made with higher qualities of wood than are used today, and most real estate agents feel that having original features will add value to any property, and make it sell more quickly. This short article shows how sash window restoration can increase the sale value of your property.
The first sash windows were a single-hung variety, probably invented in France. This style was imported into England during the 17th century, where the double-hung variety then seems to have been invented, some time around the year 1700. These new windows allowed more varied and subtle ventilation than the earlier side-hung casements, which they quickly displaced from new building designs.
Until around 1700 windows often used hardwoods such as native oak, but these woods were becoming harder to find and quite expensive, so joiners turned to softwoods from fir and pine trees. At this time these woods could be imported from the Baltic and from North America.
Many timber windows built in the last 50 years are already in poor condition, yet there are sash windows dating from the 18th and 19th centuries which are still in excellent condition. This is because the old builders used better quality timber. They selected heartwood, which comes from the tree's center, and is superior to the low priced sapwood which is often used today.
In any repair or refurbishment project on period windows it is preferable to use the highest quality wood. If it is not possible to source heartwood, then use sapwood treated with modern preservatives. Contrary to many peoples' belief, softwoods are not automatically poor quality woods, and many excellent timbers can be procured from managed forests in North America, Scandinavia and the UK.
Sash windows may be repaired and refurbished using appropriate materials, modern preservatives, and modern paints, which will reduce the frequency at which repainting is necessary. The timbers can be machined to accept discreet weather seals, which stop rattling and eliminate draughts.
The original window glass can be replaced by low E laminated glass, which improves the energy efficiency and reduces noise intrusion into the home. Secondary double glazing is also an alternative for those who wish to further improve energy efficiency. Modern locking devices may be fitted. These will improve security, and make homes safer for younger children. Home insurance costs may also be lower if improved locks are fitted.
Get inside info on how sash window restoration can significantly increase the sale value of your property now in our comprehensive guide to sash window repairs and sash windows london .