Urbanisation is one of the most significant issues facing humanity today. By 2050, two thirds of the world’s population will live in cities. Consequently, urban growth is fast outpacing the ability to build affordable and sustainable living space.
Cities all over the world are in dire need of new ways to house a rapidly growing urban population. Nowhere is this more evident than in the UK and in our capital city, where space is at a premium and housing the ever-growing population continues to pose a huge challenge.
London is at the heart of the housing crisis with experts forecasting that the city will require 60,000 new homes a year (around double the current rate) to meet new projections. Innovation in building methods and materials is required for house building in urban areas to hit these targets, while ensuring fast and sustainable construction.
One obvious, yet often overlooked solution is to start building up, and stop tearing down. Utilising new modern timber materials such as Metsä Wood’s Kerto® LVL (Laminated Veneer Lumber), enables several stories to be constructed on top of existing structures. A building extension constructed with a timber frame can be a fast, sustainable and inexpensive solution.
At a recent roundtable event hosted by Metsa Wood in London, industry professionals, including architects, designers, planners, and academics discussed the merits of modern timber and how it could be better utilized in urban architecture.
Speaking at the event, Rory Bergin of HTA Design said: “We find there is still a lot of anxiety and lack of knowledge, particularly on cost. The way to further innovation is to push at the sweet spots where the benefits are indisputable to the client.”
These comments were echoed by Nick Milestone of B & K Structures, “The people we need to convince are quantity surveyors. I’m starting to see that firms are now measuring the costs of engineered timber against traditional construction. They are saying to developers they can now build it quicker, lighter and cheaper. It is now a competitive solution. Reinforced Concrete frame is becoming very expensive.”
Linda Thiel of Sweden’s White Arkitekter discussed how timber is being used in her country for commercial and public buildings as well as houses, where it wouldn’t have necessarily been considered in the past. She said: “Too often engineered timber is being used simply to replace concrete. Once designers see it as a different material, design will flourish and create a new architecture.”
This is particularly true in urban areas, such as London, where space is at a premium and planners are looking to build on existing structures to maximise every last square foot of space.
Research shows that approximately a quarter of existing buildings are strong enough to carry additional floors made of wood. Moreover, it is the only material light enough to build quickly on to existing structures. This makes wood a highly promising building material for providing living space for billions of people – while also preserving the architectural heritage of our cities.
One of the other main considerations for considering timber in urban construction is energy efficiency, not only during the construction process but also for the lifetime of the building. This is extremely important in London as it currently has a target of a 60% reduction in carbon emissions by 2025. With homes and workplaces currently accounting for 78% of CO2 emissions in London and with 80% of the existing housing stock likely to still be in place by 2025, it is essential to improve the energy performance of new builds in order to cut costs and carbon.
In the UK, building a million new homes by 2020 in order to meet the demand of the UK housing crisis requires innovative thinking and the need to explore new possibilities, such a hybrid construction, using a range of materials including steel, concrete, brick and timber.
Through its Plan B project, Metsä Wood has been challenging the perception of architects, constructions engineers and builders as to what is possible with timber construction. As part of the project, which explores various possibilities of building with wood, Metsä Wood offers detailed examples of how to build recognizable, but modern versions of well known architectural buildings, such as the Empire State Building using wood as the main material. The models have been exhibited at trade shows across the globe and have helped to raise awareness and spark debate around modern timber construction.