Private Residence in Kew

The extension to this exquisite private residence in Kew is the great work of Simon Merrony Architects. Unique sawtooth lighting sections consisting of vertical glazing with bespoke Conservation Plateau Rooflights introduce height and an abundance of light into this open living space.

The client’s brief set out their vision for an extension with a sophisticated interpretation of the glazing and roof style of a 1930s factory. The extension would serve as a seamless link between the house and the garden.

A ‘secret stair’ off the kitchen area gives access to a split-level study above that overlooks the rooflights on the flat roof. The loft was also converted to provide a whole new floor for two further bedrooms and a bathroom, maximising the footprint of the property.

Located in the Conservation Area around Kew Station, the project necessitated a sympathetic approach to the property and its surroundings. A unique adaptation of the Conservation Plateau Rooflight, with its Victorian-style features such as the angled silicone wedge and exposed hinges, dutifully honoured the land’s heritage.

The distinctive, fully glazed sawtooth rooflights rest above the open-plan kitchen and dining area, creating a focal point in the room. The custom-designed and handcrafted Conservation Plateau Rooflights integrate with the vertical glazing to form the sawtooth structure. Combined with the crittal vertical windows below, the architect has achieved a stylish representation of the industrial theme whilst also creating a bright, welcoming space.

Sawtooth roof design was first conceived by British architect and engineer William Fairburn in 1827 and became a common feature of industrial buildings in the early 20th century. Its purpose was to create the optimum working environment by increasing natural light while maintaining comfortable temperatures.

Simon Merrony’s interpretation sees glazing on both the pitched and vertical faces. To realise this vision, our design team collaborated with Simon from the early project stages to encapsulate the essence of the design into a workable technical solution. Structural engineer Quorum also supported the team to ensure the final design was both beautiful and structurally robust.

The result was two bespoke Conservation Plateau Rooflights featuring customised base frame structures designed to align with the kerb and the vertical glazing. The base frames include additional upstand and abutment detailing to ensure complete weathertightness for this tailor-made installation.

Balancing the elements, the kitchen and dining space benefits from plenty of natural light and optimal comfort levels, supported by carefully selected glazing specifications. An 8mm Cool-Lite outer pane was teamed with an 8.8mm laminated inner pane for solar control and thermal performance, achieving a G-value of 0.36 and a light transmission of 68 percent.

The overall effect is striking. The composition of the extension has been carefully considered, with the proportions and placement of the rooflights enhancing the interior. The natural light from above creates shifting patterns throughout the day, resulting in a dynamic, uplifting space and an impactful focal point.