There is something incredibly exciting about living walls. Stacking green plants on the vertical plane on buildings, where you’d think they just should not be, goes against the odds. Yet nowadays they are almost commonplace, and most people have encountered one somewhere. They cling to life with extraordinary tenacity, usually in a growing medium only a few centimeters thick, with water fed via irrigation pipes. Cynics may criticize and some walls are without doubt better designed and maintained, or use a better system than others, but we should applaud this urban green trend, and encourage it. We need it. Modern systems are reliable and use very little water or energy to run.
As a global society we are going through unprecedented changes; now more than 50% of the world’s population is urbanised and this will grow to 75-80% by 2050. Most of those people are essentially disconnected from Nature. It is now recognised that we have an innate need, called biophilia, to maintain our relationship with Nature. Not surprising really, when you think how we have evolved, yet the psychological and physical cut-off, over the last 100 years, has been astonishing. This can only become more pronounced as cities continue to swell, and highly-stressed people produce dysfunctional societies. If we can green our urban streets then perhaps we can counter this negative effect. Green walls take up almost no footprint in the urban landscape, not even a pavement width. All that is needed is a supporting wall and we have plenty of those. Trees are beautiful and add huge amounts of biophilic interaction into a citiscape, but we find them increasingly difficult to site, due to underground services and growing space needed. Those of you who read my blog will know that I also consult on trees, so I love them dearly, but I see living walls as having a different role to play and as being more versatile.
Living Wall in a small courtyard garden by Vertology
Living walls have physical benefits on the environment too. They provide a haven and food source for insects, especially bees. Birds find seeds, berries and of course, insects on the wall and smaller birds are known to nest amongst the foliage. Living walls are also helpful in mitigation of air pollution; I was involved with designing and plant selection for a wall put up by Transport for London (top picture) to test the ability of plants to capture pm10 – airborne particulates, primarily from diesel engines. Whilst we need to remove the source of these pollutants, capturing them is a good secondary strategy. It turns out that walls in a street canyon (where the building height is greater than the street width) cause the air to move in a cyclical manner, so air passes through the foliage of a living wall several times. Trees can do this, but dense canopies can actually trap particulates down at street level, concentrating them where people are. Most trees also are deciduous, so have no such benefits in the winter months.
Interior Living wall in Norway, installed by a Vertology partner
We can bring living walls into the interior, and in fact in hostile climates, that’s where you’ll find most of them. Whilst I have designed outdoor walls in climates as diverse as Dubai, Norway (Trondheim, 62° latitude) and Chicago, in such places it is often easier to put your dose of biophilia indoors! We spend 80-90% of our time inside, so this makes sense. Such walls also clean the air. Much quoted studies by NASA have shown that a range of common houseplants (which are basically plants of a sub-tropical origin) are efficient at removing Volatile Organic Compounds VOCs, such as formaldehyde) from the air. These can be found in concentrations far higher than outdoors, due to the nature of air recirculation and energy conservation. So we bring the jungle indoors, where we live and work.
Walls have the most drama when they are large, but they don’t have to be. Small walls in intimate spaces still have a large impact. This can be a home, courtyard, rooftop or office reception. Small is beautiful.
A small indoor living wall by Vertology
Having worked extensively with living walls over the last decade, I now consult, design and install them worldwide via my company Vertology Living Walls, and its approved partners. Grab yourself some biophilia – install a living wall!
Posted in Biophilia, Design, Dubai, UAE, Ecosystem Services, Green walls, living walls, Retail, Vertical Greening Tagged with: biodiversity, biophilia, eco-system services, Edgware Road, green walls, Indoor green wall, living walls, UAE, urban greening, Vertical Landscapes
I launched my newsletter this week on vertical greening, sending it out to clients and those who’d signed up here or on the website. From the number of views and feedback, (considerably higher than industry standards) I’d say it was a success! The aim is to inform interested parties of news and developments in the field of vertical greening.
Don’t miss the next issue – sign up using the form on the right!
Posted in Arboriculture, Biophilia, Design, Dubai, UAE, Environment, Indoor Plants, living walls, Retail, Sustainability, Vertical Greening Tagged with: green walls, living walls, newsletter, sustainability
A new wall has just been installed at the Aveda Institute at High Holborn. An unusual design, it is a column wrap-around, which gives some design and technical challenges.
Because it was not possible to retrofit drainage into the building (a common problem when buildings are not owned by the occupiers), a recurculating, tank-based system was designed. Normally, water is not recirculated in a green wall because the addition of nutrients (usually injected into the water-flow) would cause a build-up of excess mineral salts and create chemical burn to the foliage. This system avoids those problems and solves the drainage issue.
A selection of plants has been chosen which will adapt to the existing light levels, which are low on the face away from the windows. Feedback from staff and visitors has been incredibly positive!
A second wall, also a column wrap, has been commissioned for Aveda at their outlet in Libertys, Regent Street.
Note: final trim detail to be added at the time these pictures were taken.
Posted in Biophilia, Design, Indoor Plants, living walls, Retail Tagged with: Aveda, Aveda green wall, biophilia, green walls, high holborn, living walls