Guide to restoring sash windows in period properties

Period properties are charming and so easy to fall in love with, however, what many homeowners may not first realise is that they require a lot of TLC.

Much of the value and interest in period properties comes from their history, original details and character. This means it is usually desirable to recover and restore the original features throughout the property, such as fireplaces old floors and windows, all of which are integral to the history and character of older buildings. Sash windows consist of two vertically sliding frames and are common features of period properties, typical of the Georgian and Victorian eras. The timber used for windows before the 20th century was of a higher quality than what is sometimes used in modern homes and therefore more durable.

One of the biggest concerns for windows in modern homes is their energy efficiency; it is of high importance that windows are draughtproofed to avoid energy loss. Older windows lose energy in two ways; by heat passing through the glass, and by warm air escaping in and around the frames. Over time older windows will have faced threats of rotting and erosion, and even with proper care and maintenance there will come a time when they either need replacing or restoring.

Replace or Restore?

There are benefits to both the replacement and restoration of sash windows, and ultimately it comes down to personal preference and the condition of the existing windows.

Original windows can be hard to replicate due to modern regulations. Wooden framed windows can be repaired and draughtproofed if they are in a reasonable condition and it will cost a fraction of the price of a replacement window. Restoration can often be done using most of the original material and can outlast new windows. A lot of the character of period homes comes from the detail and original fixtures are often desired. By restoring original windows, you are ensuring the character of the home remains.

Replacing original windows can have vast benefits from increased value and security to improved aesthetics. Modern windows are typically more energy efficient and the material, colour and finish can be tailored to perfectly fit the style of the property. If considering replacement windows, it is important seek approval from the local planning office if the home is within a conservation area, there is an article 4 direction on the property (removing the right of development) or the building is listed. If given approval or the above do not apply, the replacement of original windows can improve the value of the home if done with sensitivity. Double glazing and modern replacements also usually offer increased security as well as boosting appearance, especially where windows were damaged and or mismatched previously.

Replacement

When replacing sash windows, it is important to replicate original designs as closely as possible. Sash windows from Quickslide are low maintenance and designed to replicate traditional timer sash windows while incorporating the benefits of PVCu. Operating like traditional sash windows, their design lends themselves to that of original sash windows. Where listed buildings are concerned, and consent is required to replace existing fixtures, it is important to consider the quality and the similarity of the replacements to the original designs. It may also be worth considering custom made replacement windows.

Restore

When restoring sash windows, it is advisable to keep as much of the original glass as possible; typically, up to 90 per cent of the original timber and glass can be re-used. It is important to proceed with caution and to take care when working, old material can be fragile and over repairing signs of age can be detrimental to the properties character!