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New sashes into existing window frames header

New Sashes into Existing Window Frames

New Double Glazed Timber Window Sashes Installed into Existing Window Frames

If your window frames are in good condition we can replace just the moving parts of your timber window (the sashes), allowing for double glazing without full replacement.

High Quality Performance

We purposely select materials that offer the highest quality performance and durability meaning that our windows are easy to use, secure and require minimal maintenance.

What are sashes on a window?

Sashes are the parts of a window that move when you open or close the window. By installing new sashes into existing window frames, you can replace just the moving parts of the sash window or casement window without having to also replace the window frame.

This allows you to upgrade to more energy efficient windows.  Installing new sashes, rather than installing complete new windows, also helps save you money, minimises disruption and helps you retain the heritage of your home.

new sashes installation
Bespoke double glazed windows London

HIGH ATTENTION TO DETAIL

We have extensive experience installing new sashes into the existing box frames for both timber sash windows and casement windows.

When replacing the moving parts of the window, a high level of attention to detail is required in order to ensure that the new sashes fit and operate smoothly. This means that an exceptional level of attention to detail is required when measuring for the replacement sashes, before they are manufactured to fit precisely.

At The Sash Window Workshop, we will always take great care ensuring your existing windows are matched exactly and retain the original style of your home.

Energy Efficiency at a Fraction of the Cost

By replacing just the sashes (moving parts) of the window you can upgrade to all the benefits of double glazing without having to replace the whole window, helping to keep down the cost.

During the installation process, the old sashes are removed, before the new sashes are carefully hung in their place.

For most clients, the new sashes we fit to existing window frames are specified to be double glazed, unless single glazed is expressly required. We offer a range of glazing and paint finish options for your new sashes.

During installation, your windows are draught sealed to help keep your home warm and further improve the energy efficiency of the windows.

Finally, new ironmongery is fitted to your windows.

New Double Glazed Casement Sashes

Below is a quick walk through of The Sash Window Workshop installing new timber sliding sashes into existing window frames

Accoya: Anti-Rot Timber

For new sashes we recommend using a timber called Accoya, which is highly durable and stable and comes with a 50 year anti-rot guarantee.

As the installation of new sashes into the existing window frame does not go back to the brickwork, FENSA deem this work as repair work, rather than replacement. This means that a FENSA certificate is not required for this work.

We also manufacture and install complete new sash windows and casement windows, alongside providing a range of repair services, including draught proofing and a minor repair service.

Below shows a bay sash window where we installed new
sashes into the existing window frames

BEFORE

before work

DURING

during work

AFTER

new sashes installed

Unsure what type of windows you have? Sash windows slide up and/or down to open, whereas casement windows open on hinges, like a door.

OUR NEW SASHES INTO EXISTING WINDOW FRAME GUARANTEES

YEAR

Accoya Anti-Rot
Guarantee

YEAR

Joinery
Guarantee

YEAR

Double Glazing
Guarantee

YEAR

Paint
Guarantee

YEAR

Draught Proof
Guarantee

*Maximum Guarantees Shown. Please see our Guarantee and Maintenance documents for further information.