Have you been considering gracing your home with replacement windows and frames? If this sounds like you, you may have been toying with the idea of whether to install casement or sash style windows. This is a dilemma that many are plagued with, as we don’t want to make the wrong decision for our homes! There are many benefits to casement windows and sash windows, and you can’t go wrong with either option. Allow us to talk you through the differences and benefits of each style, helping you to make your decision for your property.

What is a sash window?

Sash windows are comprised of two panes of glass that open by sliding against each other on a vertical pulley. They originate from the 17th century and have been providing beauty in homes ever since. This makes them a sought-after addition to homes, adding value and providing thermal efficiency. This style can be elevated into a double-hung sash window, where the glass is able to be opened from both the top and the bottom. This adds further benefits to the home and are beneficial in hot and humid environments such as kitchens.

What are the benefits of sash windows?

Sash windows provide many undeniable benefits to homes of all kinds. Let’s explore what your home could benefit from if you decide that sash windows are your next venture:

  • Beautiful aesthetics – The aesthetics of sash windows are envied by many, and they provide the flair of design that your home could have been searching for.
  • Safe and secure – Sash windows can be adorned with safety features, such as impenetrable locks and child safety clasps. There are also restrictors that can limit how far your windows can open, making it much more difficult for people to climb in.
  • Energy efficient – Sash windows have advanced since their initial designs in the 17th century, meaning that the glass now available is much more energy efficient, and the frames are equipped with staff beads and draught proofing that help your home retain heat.

What is a casement window?

Casement windows are those that operate on hinges to open and close. When closed, casement windows benefit from a tight seal, which encourages their energy efficiency and also blocks noise pollution. Casement windows often lean into a more modern aesthetic and are often found in new builds and homes of a more recent origin. The material for casement windows varies between timber and uPVC. Both offer benefits for your home.

What are the benefits of casement windows?

Casement windows are typically opted for by those in newer builds and looking for an abundance of energy efficiency. There are many benefits that your home can reap by installing casement windows:

  • Brilliant energy efficiency – Casement windows have a tight seal around the perimeter, meaning that when the window is closed, the tight seal ensures that as much heat is retained as possible. This increases the energy efficiency of your home.
  • A modern aesthetic – This style of window lends itself well to a modern aesthetic, which is why they are so frequently used in new builds. Although sash windows are beautiful, they don’t fit in every home.
  • Provide a good amount of airflow – Casement windows can be opened entirely if you need them to be, meaning that they provide good airflow. This is great in bathrooms and kitchens where you may need good ventilation.

Which style should I choose for my home?

Your decision about whether to choose casement or sash windows for your home will depend on several things. Consider the style of your home, and the level of thermal efficiency that you may need.

If you need assistance in deciding which style of window will complement your home the best, our experts at Wandsworth Sash Windows are available to talk. We are experienced, having been working in this industry for years. Contact us for further information about our window styles and how they can benefit your property.


Contact the Wandsworth Sash Windows team

Talk to us – we can help with your bespoke window, door and joinery requirements. Call 02079247303 or email