This glass extension in Bath combines historic character with modern minimalism to create a refined addition to a listed home. Frameless structural glazing forms a light-filled upper dining space with uninterrupted garden views, while a glazed roof draws daylight deep into the interior. At ground level, slim framed sliding doors provide direct access to the garden with detailing that supports security, ventilation and clean threshold lines. Solar control glazing is used throughout to balance comfort, clarity and day-to-day usability.
Products Used
Project Partners
Architect: Ask And Embla Architecture
Contractor: Chepstow Construction
Location
Bath, UK
Listed building glazing with frameless structural glass
The design brief was to introduce a contemporary glazed addition that would sit quietly alongside the existing house, keeping structure visually discreet while maximising transparency to the garden. At upper level, the glazing needed to read as a continuous elevation rather than a series of framed openings, so large glass panels were joined with structural silicone to maintain clear sightlines and a minimal appearance. That frameless wall then continues into a glazed roof, requiring careful alignment of roof and wall junctions so the glass extension in Bath reads as one connected volume of light.
Internally, steel structural elements within the intermediate floor zone were concealed behind back-painted glass to preserve a calm, consistent interior finish. The result is a contemporary intervention that remains visually lightweight while respecting the character of the listed building.
Three-panel frameless glass wall with glazed roof
The upper floor is defined by three large glass panels joined to create uninterrupted views across the garden. Structural silicone reinforces the assembly without introducing visually heavy framing, allowing the dining room to feel directly connected to the landscape. This frameless glazing continues upward into a glazed roof, increasing daylight penetration and helping the centre of the extension feel bright and open throughout the day.
Slim sliding doors with slot drainage and secure ventilation
On the ground floor, a slim framed aluminium sliding door system provides the primary connection to the garden. Integrated detailing includes a slot drain to manage water at the threshold, internal key locking for security, and slot aeration to allow background ventilation without disrupting the minimal design. Within this glass extension in Bath, solar control glazing helps reduce glare and overheating while keeping the new dining and living spaces naturally bright.
Performance considerations
The extension is designed to remain comfortable and usable across the seasons. Solar control glazing helps limit glare and solar gain while preserving clear views and high daylight levels. Ventilation is supported through a combination of sliding door opening, secure background airflow via slot aeration, and an automated rooflight positioned to provide additional purge ventilation to the dining area. Concealed structural elements finished in back-painted glass help maintain a calm interior and reduce visual clutter at key junctions, reinforcing the minimal architectural intent of the glass extension in Bath.
Technical details
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Slim framed sliding doors: 21mm sightline; slot aeration positions of 7mm and 27mm; typical Uw > 1.1 W/m²K; tested to Air Class 4 / Driving rain Class 7A / Wind Class C4/B5; sound insulation up to 39dB; PAS 24
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Frameless structural glazing: thermally broken fixing profile depth 63mm; max glass thickness 41.5mm; expected Uw 1.1 W/m²K; minimum fixing setback 55mm; structure deflection allowance 5mm
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Automated rooflight: venting pane sizes up to 3000mm span × 6000mm length; opening stroke 300mm or up to 600mm; max vent weight 160kg or 400kg; max glass thickness 41.5mm; fully thermally broken frame with concealed motors
Brook Lodge shows how a glass extension in Bath can be detailed to feel calm and minimal while delivering panoramic views, high daylight levels and practical ventilation for everyday use. This approach is particularly well suited to listed and heritage homes where the aim is to add a clearly contemporary glazed volume without heavy framing or visually dominant structure.
To discuss a similar glazing-led extension, and for advice on design detailing, specification and installation, contact our technical team now.
