Restoring your sash and case windows might feel a little daunting.
At Pren, we like to be transparent with what’s involved in your window restoration. We’ve put together this little guide to let you know about the core components and parts that make up a sash window.
There are several parts and components that make up a sash window. We have labelled them below so that you can identify the different areas.
The architrave is a moulded trim that covers the frame and the wall. The trim provides a clear indication of the age of the window.
A pulley is essentially a wheel with a groove in it. A cord or cable is placed in the groove and when pulled, allows it to pull the object (in this case, a sash window) up and down. Axle wheels on sash windows can come in many materials, such as brass, iron, and nylon.
This is located at the lower end of the sash and its purpose is to allow room for the slope of the cill.
The cill acts as the frame on which the box-frame is constructed. Most premium sash windows use hardwood when building the box-frame as this allows better protection from the elements and looks far superior.
Draught strips are not present in all sash window designs, but it is a welcome addition in the right circumstances. For example, if you live on the coast or experience draughting problems, a draught strip may be incorporated into the design.
There are a few catches that can be used in a sash window, but a flitch catch is the most common. It’s mounted on the meeting rails to fasten the window.
Glazing comes in a few variations, single glazing, and double glazing. Most sash window designs incorporate a single-glazed finish but if you are looking for superior thermal efficiency, you can opt for double glazed sash windows. This is something we provide at Pren, and each window is constructed to mimic the traditional design of a sash window with the combined benefit of being thermally-efficient. However, if you are living or renovating a listed property, you may only be able to install single glazed windows.
Horns are typically used to strengthen the joints of the window and prevent it from being opened too far.
As the name suggests, the inside lining is the lining that lines the inner sides of the box frame.
The name given to the top and bottom meeting rails (position at the top and bottom of the sash window). They play an important part in boosting the durability and security of the window.
This part of the sash window juts out from the lower side of the frame. The reason for this is because sash windows are typically built into the inner side of the property’s brickwork.
The parting bead serves to separate the sashes (to allow for easy mobility) and holds them in place so they don’t fall when opened. They remain in place thanks to the pulley-stiles and head.
The pocket allows easy access into the weights within the sash.
The pulley stile is responsible for bearing the weight of the sashes and the weights. It’s positioned over the axle-pulley.
Sash bar (or sash-gut) serves to separate the panes of glass (if the window has more than one window pane). This prevents rubbing and catching.
This is simply the rope that is fed through the axle pulley.
As the name suggests, sash lifts help you raise the bottom sash. They are usually made from metals (typically brass) but can be made from wood.
Sash weights keep the sash balanced so they are able to remain fixed in position when pulled up.
This is the moulding that covers the sash join between the outer redlining and the masonry.
Unlike the traditional means of balancing a sash window, spiral balances use a spiral-based mechanism which includes a spring that helps to suspend the weight of the sash. In box-frame sash windows, they are positioned within the edges of the sash stiles, in modern sash windows they are placed into the frame stiles.
This is a moulded bead responsible for securing the bottom sash. Staff beads are screwed into the inner lining of the frame.
Positioned on both sides of the sash, stiles are the mouldings.
The top rail of the sash window.
A trickle-vent is ideal for customers who require a small gap or vent for air to pass through.
Ideal for placing trinkets for decorative purposes.
Looking to restore your sash and case windows?
Whether you’re restoring your sash windows or are considering purchasing entirely new ones, we can help.
We provide customers with completely bespoke sash windows across Edinburgh. Each window is made bespoke for your home. With a range of styles, materials, colours, and fittings, our team can transform the appearance of your home with a beautifully-crafted sash window.
Looking to maintain your sash and case windows?
The Pren maintenance plan has been created as we have several years’ experience with sash and case windows and many of the refurbishments we carry out are caused by windows suffering from a lack of maintenance over the years.
By offering our clients a maintenance package for a small monthly payment, we can maintain and enhance the external appearance of your property, whilst ensuring your windows are always in full working order.
Instead of having to spend thousands on full renovations every 5-10 years, your windows can be maintained to the highest of standards by us. Our pricing and packages are very straight forward and we can have your windows in prime condition in no time.
View our sash and case maintenance plans here.