Secondary Glazing for Listed Buildings
Retain your original windows. Add thermal and acoustic performance. Planning-friendly secondary glazing for Edinburgh's heritage properties.
Keep your original windows. Improve your comfort.
Secondary glazing is the planning-approved solution for listed buildings and conservation areas where replacing original windows isn't permitted — or isn't desired.
An internal secondary panel is fitted to the existing window reveal. It is removable for summer months and maintenance, and invisible from outside.
- No planning permission required in most cases
- Improves U-value without replacing original windows
- Considerably reduces noise levels
- Removable — no permanent modification to the building
- Recognised by Edinburgh City Council conservation officers
Secondary Glazing Options
Lift-Out Panels
Simple, removable panels. Lowest cost option. Suitable for infrequently opened windows.
Horizontal Sliding
Two panels slide past each other. Full ventilation access maintained. Most popular option.
Vertical Sliding
Mirrors the operation of original sash windows. Perfect for traditional sash and case properties.
Side-Hung Casement
Hinged on one side, opens like a door. Ideal for wide windows or French door openings.
Acoustic Grade
Laminated glass with large air gap. Significant noise reduction. Ideal for city-centre properties.
Thermal Grade
Argon-filled sealed unit in secondary position. Maximum thermal improvement for period homes.
Frequently Asked Questions
Does secondary glazing need planning permission?
In most cases, no planning permission is needed for secondary glazing. Because the original windows are not altered and the secondary panels are on the inside, it is generally accepted even in conservation areas and listed buildings. Always confirm with your local authority for listed buildings.
Can secondary glazing be removed?
Yes — that's one of its key advantages. Our secondary glazing is designed to be removable, making it ideal for the summer months or for maintenance purposes. It can be taken down and stored when not needed.
How much noise does secondary glazing reduce?
Secondary glazing can considerably reduce noise levels, making it one of the most effective solutions for city-centre properties or those near busy roads. The large air gap between the original window and the secondary panel is key to this performance.
Will secondary glazing affect the look of my windows?
Secondary glazing is fitted internally and is invisible from outside. Inside, slim aluminium frames are used which are designed to be as unobtrusive as possible. Most clients find them barely noticeable.
Is secondary glazing better than replacing my windows?
For listed buildings and conservation area properties, secondary glazing is often the only compliant option. Even where replacement is permitted, secondary glazing can be a cost-effective way to dramatically improve thermal and acoustic performance while retaining original windows.
Do you install secondary glazing Scotland-wide?
Yes. We install secondary glazing across Edinburgh, Glasgow, and throughout Scotland. Contact us to discuss your property and arrange a survey.