Sash windows are the part of a window that slides up and down when opened. Sash windows have become classic classics for period properties, offering an authentic look.

Sash windows consist of many parts, each playing an essential role. Understanding these components allows you to identify any problems early and ensure your sash windows continue functioning optimally.

Origin

Sash windows have been around since at least the 13th century, though their exact origins are uncertain. Originally, these simple holes in walls did not completely seal off interior air from outside influences; thankfully, technology progressed so that these windows could be made more secure and easier to keep clean.

Eventually, windows became more sophisticated, using pulleys and ropes to open and close them. These were eventually replaced with a system that utilized weights and a counter balance to maintain their opening position. Furthermore, these weights were concealed within the frame of the window so as not to be visible to view.

Sash windows are an excellent way to bring natural light into your home. Not only are they easy to maintain and stylish, but they are an example of British architecture that continues to be used today.

They have become a popular choice for both new and existing homes in England, typically found in Georgian or Victorian-era residences, though they have also gained widespread acceptance among Edwardian suburban houses.

Sash windows have a somewhat mysterious origins; it is believed they originated in the Netherlands but they are less commonplace elsewhere in Europe than here in the UK.

One of the earliest known examples of sash windows can be seen at Ham House in Richmond, London. This design featured three glass panes across by two up (known as ‘three over three’), with each sash consisting of an upper and lower section for a total of 12 panes.

Although this window design is typically attributed to the Dutch, some historians suggest Robert Hooke – a 17th-century natural philosopher, architect and polymath – invented it. His documented works also show that he had some involvement in developing sash windows as well as doors; however, whether he actually invented them himself or simply adapted them for his own builds remains uncertain.

The sash window quickly gained notoriety among English Royalty and landed aristocracy, being first installed into some of England’s grandest homes like Chatsworth House or Ham House; these joined other Royal Palaces such as Hampton Court and Kensington. Not only did these sash windows add aesthetic value to properties, but they were also great at insulate buildings from cold weather conditions.

Function

Sash windows are an excellent addition to any home. Not only are they durable, secure and energy efficient; but their classic look complements period homes perfectly.

Sash windows are made up of several components that work together to keep them operating optimally. These include the frame, glazing and sash. Together these three pieces form a seal that keeps air and moisture out while securely holding glass in place.

The frame is typically constructed out of wood or aluminum and painted for a more polished appearance. In many cases, it’s made out of uPVC to reduce maintenance costs and boost energy efficiency.

Aluminium sash windows may be more expensive than their wooden counterparts, but they are stronger and less prone to rot or break. Furthermore, these windows come in an array of colors and finishes and can easily be recycled after use.

UPVC and aluminium sash windows tend to require low upkeep, but they should still be examined annually for cracking or flaking paintwork. This is especially important with timber frames since the paint acts as a shield from moisture damage – leaving the wood vulnerable to deterioration over time.

Modern sash windows feature two active sashes that open at the top and bottom to promote natural ventilation in and out of a room. This helps maintain healthy indoor air quality, decreasing the risk of health conditions caused by stale or moist air.

Another advantage of sash windows is their ease of operation and lack of complex mechanisms. Typically, pulleys and counterweights are hidden inside the frame for added discretion, keeping them out of sight.

Sash windows are also easier to clean than other window types due to their tiltable nature; this allows you to clean the exterior of the sashes without needing to climb up a ladder – especially useful in higher-storey buildings.

Are you in the market for quotes on sash windows? Contact us today or fill out our enquiry form online. We will forward your details to up to three local window suppliers so that you can receive tailored quotes tailored to fit within your needs and budget.

Maintenance

Sash windows are classic elements of Georgian and Victorian homes, providing visual nostalgia of a more classic era. To maintain their beauty and prevent replacement needs in the future, it is essential to regularly inspect them.

Regular cleaning is the best way to keep sash windows looking their best and prevent costly replacements. Check for signs of deterioration or wear such as cracking or flaking paintwork, and confirm that the sashes open and close smoothly.

If you are unable to perform maintenance yourself, we suggest hiring a professional. This way, any problems can be identified early and fixed before they become costly issues.

It’s essential to inspect your sash windows for signs of rot as soon as possible. Doing this could save you money in the long run, as early detection helps prevent this issue from escalating and spreading.

Test for decay by inserting a knife into the wood frame and feeling how it feels. If it feels soft and spongy, that could indicate that your timbers are beginning to decay.

If you observe significant rotting in the timber of a window frame, it’s worth getting professional help to assess for further damage. While it may be possible to restore with simple restoration techniques, if left untreated it may be necessary to completely remove and replace all of its components.

Another issue with traditional sash windows is their difficulty in cleaning, as dirt and grime can get trapped between the glass and wooden sash. This allows water to seep into wooden frames and cause rot.

Maintain the appearance of sash windows by regularly cleaning them with a microfibre cloth instead of paper towel. Doing this prevents dirt and grime from building up on the window panes, keeping your windows looking like new for longer.

Resealing timber windows as they age is essential to maintain their paintwork’s quality, and should be done every five to eight years.

Security

Sash windows are a charming feature of period properties, but they can also be an issue for homeowners looking to improve their security. Fortunately, there are some steps you can take to make sure your sash windows remain secure and shield your home against burglars.

First and foremost, you should upgrade your window locks and catches. These components of any sash window’s security should never be neglected, as unlocked ones can pose a major risk to the safety of your home.

For instance, a burglar can use a knife or screwdriver to open up a pivot latch or hammer off screws if your locks are outdated and not well maintained.

One way to secure sash windows is by using chain locks, similar to those used on doors. These restrict how far a window can open. For maximum protection, fasten them securely onto both the sash and frame using screws that extend as far as the window will allow.

To further secure sash windows in different open positions, add additional brackets on the upper sash. Doing so will limit how far a burglar can pry the lower sash open by sliding it past the upper one.

Finally, you can secure your sash windows to the exterior of your property by adding a security bar. These are easy to install and will deter would-be burglars from reaching inside to open up your windows.

Charley offers a range of sash window security bars in various shapes and materials. Choose one that’s both visually appealing and functional, like an arm that attaches to both the sash frame and casement.

If your sash window is equipped with a traditional centre catch, consider replacing it. These catches are frequently targeted by burglars as they’re easy to access from outside.

The Fitch sash window lock is the most secure choice, featuring a half circle catch that’s difficult to knock off from outside your sash window. Other centre catches such as simple pivot or finger screw catch are less vulnerable to attack.