Keller minimal windows® Sliding Doors Open the Extension to the Garden
The principal garden-facing elevation is formed by a Keller minimal windows® three-track sliding door system, comprising two sliding panes alongside three fixed panes. The arrangement creates a broad glazed elevation while retaining the minimal framing characteristic of the system.
The two central sliding panes provide the main opening onto the garden. When opened, they create a direct physical connection between the extension and the outdoor space, while the fixed panes maintain the glazed composition beyond the opening.
This balance between fixed and opening glass was important to the architectural concept. The elevation is predominantly transparent, allowing the garden to remain visually connected to the interior, while the restrained framing prevents the sliding doors from becoming visually dominant.
The sliding door system was also designed in conjunction with the structural framework supporting the extension. The architectural drawings identify supporting structure by IQ Glass around the rear glazing, with the interfaces between the sliding system, steelwork and surrounding construction carefully detailed.
The result is a rear elevation that can transition between a fully enclosed interior and an open garden-facing space, reinforcing the connection between the renovated house and its landscape.
A Frameless-Effect Glass Roof Creates a Light-Filled Interior
The glazing continues overhead through a large frameless-effect fixed glass roof spanning the new extension. Formed from six silicone-jointed glass panes with supporting steel sections between the panels, the roof brings natural light deep into the new space while maintaining the restrained appearance of the wider glazing scheme.
The roof is an important part of the architectural concept because it allows the extension to receive light from above as well as through the garden-facing elevation. This creates a brighter interior without relying solely on the rear wall of glazing.
The frameless-effect approach also helps maintain the visual simplicity of the extension. Instead of introducing a conventional framed rooflight structure, the design keeps the glass visually prominent, allowing the roof to read as a continuation of the transparent architectural language established by the rear elevation.
The structural requirements of the roof were closely integrated with the wider construction. The architectural details show the glass roof fixed to supporting structure, with steelwork coordinated around the junction with the sliding doors and concealed guttering used to resolve the roof edge.
This careful coordination allows the roof to provide a significant amount of natural light while maintaining the clean, minimal character of the extension.
