In 2014 we were given the exciting opportunity to design a replacement for a dilapidated, unused and unloved glass conservatory in East London. In this we saw the opportunity to experiment and develop an innovative timber roofing system. The result, a self reciprocating, double curved timber roof with a stressed skin. A unique roof was created unlike any in the surrounding area, floating above a beautiful space which is flooded with natural daylight everyday no matter the time of year.
STEP 1 - 3D Modelling
After we had the idea for our new roofing system, we modelled it completely down to every nut and bolt on BIM. This allowed us to collaborate with structural engineers to ensure the rigidity of our proposed design. From our BIM model we were then able to extract each timber beam's outline for our test model.
STEP 2 - Laser Cut Model
As our excitement increased about our idea becoming a reality we decided that we wanted to build a little version to keep in our office for ourselves. We produced a scaled laser cut model of the roofing structure - which not only looked cool but helped settle our nerves about it fitting together. Effectively we had designed a timber jigsaw on a building scale.
STEP 3 - CNC Cutting
Physical model complete, it was now time for the real thing! After final structural checks, we exported our template for the timber beams and sent it over to Finland. We had decided that the best construction material would be Kerto-Q Structural LVL (Laminated Veneer Lumber) from Metsa Wood in Finland. The reason we decided on this was due to its exceptional structural performance. This super strength comes from its cross lamination, with each layer going in a different direction, meaning that when cut into curved beams the structural strength is in no way comprised. The below image shows how each sheet of LVL was cut using a CNC machine forming our individual pieces, with millimetre accuracy.
It was then a waiting game for our timber to arrive in London!
STEP 4 - Timber Arrives!
After a quick few weeks the wait was over and our oversized jigsaw pieces were in London! We began the trouble free, seamless operation of slotting ever piece together forming our double curved timber latice that served as the roofs 'structural bones'. Each element was bolted together, spreading the load across the entire roof, then down to the foundations through the steel support columns. Of course we had to go to site in order to see this process happen, we couldn't miss it!
STEP 5 - Completion
After the roof structure was assembled it was then lifted into to place, floating on thin steel columns and then made water tight with slithers of glass between the roof and the minimal side walls. The result, an innovative roof curving up graciously towards the sky. Not only an architectural showpiece in East London but also an engineering triumph. We were thrilled with our design but not as excited as the clients were to gain an extra room in their house. They were able to enjoy their garden all year round and fall back in love with their home. While great on the inside the unique extension also looks fantastic for passers by, especially once the sun has set and the building glows from within.
