Sevenoaks School New House

The acoustic strategy is an evolution of the design we applied on Aisher House. Both boarding houses have a cross laminated timber (CLT) structure, which presents particular challenges for sound insulation. Using data from the sound insulation measurements we took in Aisher House, we were able to optimise the wall and floor buildups, and provide acoustic performance well above the regulatory minimum, saving space, money and embodied carbon.

The control of noise from the communal social spaces, including the music/games room, to the dormitory bedrooms was a particular consideration. Acoustic plaster and slatted timber finishes in the communal areas limit the degree to which sound can build up when these spaces are busy. Carefully specified walls and doors to the surrounding dormitories also provide high levels of separation.

The end result is a quieter environment for occupants that enhances wellbeing, focus, and overall quality of life.

Adopting Passivhaus principles means the accommodation is low-energy, high-quality, and with a high-comfort standard. The building is constructed from CLT, selected for its low embodied carbon. An exceptional thermal envelope with minimal thermal bridging means the heating demand is very low, but the provision of electric radiators in bedrooms, and underfloor heating in communal spaces, all with end-user control, ensures occupants' comfort all year round. 

The Passivhaus approach has reduced the need for space heating to such an extent that heat pumps are able to supply all the hot water for the building. There is natural ventilation during the summer, and MVHR for the colder months, with high-efficiency heat exchangers to minimise heat loss. The air intake and exhaust is situated in the chimneys, which keeps any noise to a minimum.