New Hardwood Sash Boxes | SashWise

New Hardwood Sash Boxes

If you wish to reinstate traditional sash windows into your property, whether they are beyond repair or have previously replaced with non-timber or casement windows. We can supply and fit new hardwood sash boxes complete with double glazed sash windows that replicate the originals.


Is this for you?

Have your timber sash windows been replaced with UPVC or aluminium casement windows?
Do you want to reinstate the original features?
Are your timber sash windows and frames beyond repair?



A double glazed sash will provide improved thermal performance, will retain heat and reduce noise levels.
Our new sash windows will replicate the original window keeping the character and architectural identity of your property.
By installing a new sash window where they have been previously replaced you are reinstating the original character features to your home, improving both the aesthetic look of the property and its market value.
We increase the depth of our sash boxes to allow us to accommodate a thinker double glazed unit, triple glazing or combining acoustic glass to within a double glazed unit.
By installing a new sash window, you have the peace of the mind that all of the joinery is new, spray finished, completely draught-proofed and meets current building regulations.


How do we do it?

We carefully remove the old sash windows, and the window openings are cleaned and prepared. We install the new sash boxes complete with draught-proofed double glazed sashes. We point the external surroundings of the new box and fit new internal architrave and bullnose cill. Finally, we make good any plasterwork that has been disturbed.  

We fit all of our new sash windows with new security locks and window furniture. For more information on how we do it, click below. 

Find out more about New Hardwood Sash Boxes or contact us for a no obligation chat

Our other services

Full restoration

We will completely and sympathetically restore the windows, so they will look like new without losing any original features.

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Servicing and draught-proofing

If your sash window are jammed, or the cords are broken, this service will get them working smoothly again

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New hardwood double glazing

Here at SashWise we can make new double glazed hardwood timber sash windows to fit within your original box sash frame.

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