11 March 2019

New Case Study: Streatham & Clapham High School

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The celebrated Streatham & Clapham High School, which is based in London, features a series of extensions which carefully expand, re-use, refurbish and protect the school’s original 1930’s building.


The first phase provided a new sixth form centre, which sits atop the main body of the school as a rooftop pavilion. This pavilion contains study spaces, classrooms, offices and a science laboratory, and is connected to the rest of the school via new stair towers.


The second phase comprised a ground floor extension featuring a new dining hall and school entrance.


The internal spaces of both extensions are characterised by the prominent use of exposed cross-laminated timber (CLT) – PEFC certified, sustainably sourced Austrian spruce, provided by TRADA member KLH UK. The addition of curved glulam cross-columns mirror the trees outside, more of which have been introduced to provide the school with varying colour across the seasons, while internal window mullions further highlight the natural beauty of a timber finish.


This use of CLT, along with careful design consideration of even the finer details, maximised the impact offsite construction had on reducing onsite build time and wastage – both necessary to the project in order to minimise disruption to the occupied school. 3D modelling enabled the creation of complex forms while the preparation and precision of CLT facilitated an efficient erection. The relative lightness of the construction meant additional foundation work was unnecessary, while sufficient mass was still provided for acoustic separation and fire protection.


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