Secondary Glazing for Listed Buildings
For a building with protected historic features, an internal glazing proposal needs to respect the original window and setting.

Secondary Glazing for Listed Buildings — respect retained fabric while required heritage permissions, with site access, working hours and protection requirements planned, with the property access and working requirements reviewed.
We consider slim sightlines, fixing details and the potential to remove the system later. Obtain advice on the specific building and proposed work before committing to manufacture.
The detail that matters
Can I assume internal glazing needs no consent?
No. Ask the relevant conservation authority about the proposed alteration and retain its advice with the project records.
Before the work
is agreed.
Can I assume internal glazing needs no consent?
No. Ask the relevant conservation authority about the proposed alteration and retain its advice with the project records.
Can historic glass be left untouched?
Retention may be possible, but any existing damage or required specialist repair should be assessed independently.
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 Listed Buildings by area
Select a place to view this service for that location. Please provide the postcode when you enquire.