Secondary Glazing for Sash Windows
Secondary glazing can preserve an existing sash window while adding an internal glazed layer.

Secondary Glazing for Sash Windows — preserve access to sash cords while opening leaves, with specification, handling and safe installation requirements agreed, with the installation method, protection and finishing details planned.
The survey compares sliding, hinged and removable options against the reveal depth, sash access and any shutters. Repairs to the original sash are identified separately from the inner installation.
The detail that matters
Does the old sash normally stay in position?
Retaining it is usually the purpose of this approach, subject to addressing any faults in the original window.
Before the work
is agreed.
Does the old sash normally stay in position?
Retaining it is usually the purpose of this approach, subject to addressing any faults in the original window.
Will internal shutters still open?
Their full movement and folded position need to clear the proposed secondary frame, so they must be included in the measurements.
What should I include in this enquiry?
Send photographs of the whole window and room-side reveal, including handles, shutters and blinds. Give the postcode and explain whether noise, heat loss or another concern is driving the enquiry.
Secondary Glazing for Sash Windows by area
Select a place to view this service for that location. Please provide the postcode when you enquire.