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Discreet Secondary Glazing for Period Properties

Discreet Secondary Glazing for Period Properties

Our bespoke timber secondary glazing sliding sash units are designed to improve comfort, thermal efficiency and acoustic performance whilst preserving the character of existing period windows. Installed internally behind the original sash window, these slim-profile systems provide an additional insulating barrier without altering the external appearance of the property, making them ideal for listed buildings, conservation areas and heritage refurbishments.

Manufactured to order in our UK workshop, each secondary glazing unit is carefully designed to integrate neatly within the existing window reveal using slim timber sections and discreet detailing to maximise natural light and maintain traditional sightlines. Suitable for Georgian, Victorian and Edwardian properties, our secondary glazing systems provide a sympathetic solution for improving the performance of original timber sash windows without the need for full replacement.

Improved Thermal & Acoustic Performance

Improved Thermal & Acoustic Performance

Every secondary glazing sliding sash unit is handcrafted using premium timber, precision joinery techniques and smooth spring-balanced operating systems designed for reliable everyday use and minimal visual impact. The slim internal sash system allows practical ventilation and access whilst helping to significantly reduce draughts, condensation, external noise and heat loss within the property.

Available options include laminated acoustic glazing, vacuum glazing for enhanced thermal performance, discreet locking systems, brush seals and factory-applied paint or stain finishes tailored to your project requirements. We can also manufacture shaped and bespoke secondary glazing systems designed to work sympathetically alongside existing shutters, trims and original sash window detailing whilst maintaining the elegant appearance of traditional period interiors.

FAQ

Secondary Glazing Sliding Sash

Do I need to replace my existing sash windows to install secondary glazing?

No — secondary glazing is designed specifically for properties where the original sash windows cannot be changed or where customers want to keep the existing frames. The new unit sits discreetly on the inside.

Will secondary glazing change the appearance of my windows?

No. The system is fitted internally with slim timber profiles, so the external appearance of the property remains completely unchanged.

What timber options are available?

Units can be manufactured in Redwood, Sapele or Tulipwood, with other species available on request.

What glazing options do you offer?

We typically supply laminated single glazing or vacuum‑sealed units for enhanced thermal and acoustic performance. Both options are fitted within thin profiles to maximise natural light.

Does secondary glazing help with heat loss and draughts?

Yes. Secondary glazing creates an additional insulating layer, significantly reducing heat loss, draughts and cold spots around older sash windows.

Will it reduce noise from outside?

Yes — laminated and vacuum‑sealed glazing options provide excellent acoustic performance, making them ideal for busy roads, urban areas or noise‑sensitive properties.

Are the units made to measure?

Yes. Every secondary glazing unit is manufactured to bespoke sizes to ensure a precise, discreet fit behind the existing sash window.

Where are your windows manufactured?

All of our timber windows are manufactured in the UK.