Secondary Glazing for Listed Buildings and Conservation Areas

The approved, reversible solution for Scotland’s traditional and historic homes — made to measure in Aberdeen.

The listed building problem

Scotland’s Category A, B, and C listed buildings are some of the most beautiful properties in the country — and some of the coldest. Single-glazed sash windows, draughty original frames, and thick granite walls that lose heat the moment the wind picks up can make them expensive and uncomfortable to live in.

Replacing the windows isn’t an option. Replacing or altering original glazing in a listed building requires Listed Building Consent from your local council, and permission is rarely granted where it would change the appearance of the building. Standard double glazing is almost always refused.

Secondary glazing is the solution Historic Environment Scotland recommends. It sits on the inside of your existing window — leaving the original completely untouched — and creates an insulating air gap that dramatically cuts heat loss, reduces draughts, and lowers noise.

Why InGlaze is right for listed buildings

InGlaze secondary glazing is manufactured at our Aberdeen factory and custom-cut to fit your exact windows — including irregular, arched, and stained glass frames common in Scotland’s traditional buildings.

No planning permission required
Our secondary glazing is fully internal, reversible, and leaves no permanent marks on the building. It does not affect the external appearance of your property, which means it falls outside the restrictions that apply to listed building alterations.

Works with uneven and aged frames
Our patent-pending adaptive TPE seal accommodates the uneven, settled frames typical of older Scottish properties — the kind that standard off-the-shelf systems simply can’t fit.

Invisible from the outside
Made from 3mm crystal-clear acrylic, InGlaze panels are virtually undetectable once fitted. Conservation officers and neighbours won’t notice a thing — only you’ll feel the difference.

Made in Scotland, for Scotland’s buildings
We manufacture everything in Aberdeen. We understand granite tenements, Victorian sash windows, Georgian town houses, and rural stone cottages. Our systems are designed around Scotland’s building stock, not imported and adapted.

Which buildings can InGlaze help?

InGlaze is suitable for:

– Category A, B, and C listed buildings
– Conservation area properties
– Aberdeen granite homes and tenements
– Victorian and Georgian sash and case windows
– Arched windows, stained glass, and irregular heritage frames
– Churches, commercial buildings, and community halls
– Rented properties (fully removable with no damage to frames)

FAQ

Do I need Listed Building Consent for secondary glazing in Scotland? In most cases, no. Because InGlaze secondary glazing is internal, reversible, and does not affect the external appearance of your property, it is generally considered an exempt alteration. However, each local council has its own policies — we always recommend checking with your planning authority if you are unsure. We can advise on this when you get in touch.

Will secondary glazing look out of place in a historic interior? No. InGlaze panels use crystal-clear acrylic and fit closely into your existing window reveal. They are designed to be discreet. Many customers in listed buildings report that visitors simply don’t notice them.

How much heat will I actually save? InGlaze Push-In Panes have been independently tested by the University of Salford and shown to reduce heat loss through the window by up to 50%. In older buildings with single glazing and draughty frames, the improvement to comfort is often immediate.

Can you fit secondary glazing to sash and case windows? Yes. Our Push-In Panes are particularly well-suited to individual sashes in Georgian and Victorian windows. Each pane is custom-cut to fit the exact dimensions of your sash, including any slight variation between panes in the same window.

Can I fit InGlaze myself? Our Push-In Panes are designed for self-installation. Measure at home, order online, and fit in minutes — no tools or fixings required. Our Whole Pane system is installed by our team. [See our installation guide →]

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