The Sustainable Sash Company
The Double Glazed Sash Window Specialists
About Us
At The Sustainable Sash Company, we install bespoke double glazed sash windows into residential and commercial properties across South Wales.
​
We also provide a retrofitting service along with paint and repair services for the original sash window boxes.
With over 15 years of experience in the restoration of sash windows in listed buildings and conservation areas, our focus is on providing sustainable solutions that preserve heritage aesthetics while incorporating modern energy-efficient features and materials.
Contact us to discuss your project and arrange a free quotation.
Our Services
Retrofitted Double Glazing
Retrofitting preserves your original sash windows by replacing the single glazed panes with double glazed units.
When combined with draught proofing, retrofitted double glazed sash windows are an energy efficient and elegant solution for historic properties.
Replica Double Glazed Sash Windows
As an alternative to retrofitting, we supply and fit bespoke hardwood double glazed sash windows.
​
Double glazed replicas of the original sashes are expertly crafted and fitted into the original sash window boxes to ensure the character of the property is retained.
Full Replacement Box & Sash Windows
In many properties the original sash windows were removed and replaced with windows that don't complement the style of the building.
​
Our bespoke sash window fitting service can restore your property to its former glory.