By Rob Hopkins, posted May 16, 2012:
What might we learn from the construction, between 1438 and 1448 of the Hospital of St. John in Sherborne (see above) that might shape the way we think about construction in the 21st century? While the bulk of the building was built using local oolitic limestone, it was dressed with Lias stone from Ham Hill, some 12 miles from the building site. However, in those days, without the internal combustion engine, 12 miles was a long way to carry stone (you try it). The meticulous accounts kept of the project at the time show that the cost of transporting the stone by cart cost more than the stone itself. As Alec Clifton-Taylor says in his seminal ‘The Pattern of English Building’, “it was the great difficulty of transporting heavy materials which led all but the most affluent until the end of the eighteenth century to build with the materials that were most readily available near the site, even when not very durable”.
I often use the analogy, in terms of food, of a cake. Until recently, local production provided the cake (the bulk of our needs) and what was imported was the ‘icing’ and cherry on top, nice to have but we didn’t depend on it. What cheap energy and globalisation has created is a situation where now the cake is imported from wherever in the world it can be found cheapest, and local production is just the icing. In the same way that for food we need to urgently reverse this, for many reasons that will be only too familiar to regular readers of this blog, the same can be argued for building materials.
In the case of these alms houses in Sherborne, it literally was the building’s ‘icing’ that caused the difficulties. With about 30% of UK road freight now due to the movement of construction materials, many of which already have a high level of embodied energy, I’d like to argue here that we need to think about construction in the same way we are starting to think about food, specifically in the context of the Atmos Project, a community initiative I am involved in in Totnes.
Historically, as well as being the only option people had, the use of local materials also led to the evolution of vernacular styles of building, so that each region had its own distinct styles of building, rooted in materials, culture and tradition. As John and Jane Penoyre note in ‘Houses in the Landscape’ “in these simple buildings the available materials are the principal dictators of style”. Mark Gorgolewski writes in The Green Building Bible:
“… as materials closer to their natural state will tend to have had less processing, which often means less energy use, less waste and less pollution. Local materials can reduce the need for transport and benefits the local economy and community”.
Christopher Day writes that “local materials minimise transport energy, suit local climate, support local employment and society and reinforce locality identity, anchoring buildings into local culture … so roundwood instead of sawn, adobe or brick instead of concrete”. As well as having far less embodied energy due to requiring so little transportation, they also often have far less embodied energy in their manufacturre, as the graph below showing overall CO2 emissions by weight [kg] released by production of 1 kg of twenty-four common building materials demonstrates (source). Note that those materials on the right hand side actually lock up more carbon than they emit (depending on how far they are transported of course, a strawbale house in the UK built with Turkish bales would clearly not qualify):
Then there’s also the aesthetics. The other day I was in Marlborough in Wiltshire, and took a walk around the town. It is easy to be nostalgic about old buildings, and to assume that they are so characterful and attractive simply because they are old. I would argue that the ambience that comes through in some of the photos below has more to do with the materials than with the age of the building.
Clay wall tiles that were fired in kilns with variable temperatures produced tiles of a range of colours, from black to orange, which gives the tiled surface much more richness.
This timber frame house is a beautiful example of how the materials available locally dictated the design of the building and its character.
There has been a resurgence in interest in the use of natural and local building materials in recent years. Cob building, strawbale, lime plasters, roundwood timber, hemp, clay plasters, have all experienced a renewal of energy, but are still almost only ever used in self build projects, and have yet to cross over into mainstream construction. Yet, as Gill Seyfang points out, they are still very much in a niche and what is needed is “scaling up the existing small-scale, one-off housing projects to industrial mass production”. She argues for the natural/local building niche “adapting itself to resemble the regime”. Key to that will be scale.
Of course, running alongside the discussions about materials is the need to create truly low carbon buildings, in their construction, their inhabitation and eventual demolition/recycling. The Larch and Lime houses built recently in Ebbw Vale are passivhauses (Larch House right), that is they are built in such a way as to require no space heating. When I talked to the architect behind them, Justin Bere, he told me that most of the materials were local (stone, slate, locally made Rockwool etc) but hadn’t veered too far into the world of very local and natural materials. Part of the reason for that is that for the kind of accurate modelling needed for passivhaus certification, data for many of these materials doesn’t yet exist. I would argue that this is a pressingly urgent area for new research.
Enter the Atmos Project. For the past couple of months, as well as my Transition Network stuff, I have been working a day a week on the Atmos Totnes campaign. Atmos has been running for the past 5 years, since Dairy Crest closed their 8 acre site next to Totnes station, and since when it has sat and become more and more of an eyesore (you can read the story so far here). The Atmos Project, as it became known, due to it being home to a building built to house Isambard Kingdom Brunel’s experimental ‘atmospheric railway’, has sought to bring the site into community ownership to develop it as a catalyst for new businesses in the town and as a demonstration of Transition in action.
The initiative did a lot of work, raised bits of funding to do design work, business planning and so on, but seemed to be getting nowhere due to the site’s owners’ unwillingness to engage seriously with the community. So a couple of months ago we started a campaign, aimed to bring sufficient pressure to bear on the site’s owners. We gathered voices from around the community, got a lot of media exposure, got people in the town out for a big photo opportunity and for a public meeting, and a couple of weeks ago, had a very positive meeting with Dairy Crest, and all of a sudden the project is moving forward with an energy that is a delight to see.
The tagline for the campaign has been ‘the heart of a new economy’, and it is seen as a development that in all that it does is focused on skills, training, the creation of new businesses and the boosting of the local economy. It is of a scale where it can do some very exciting things in terms of construction. One of the founding ideas is that the place that the development starts its very first question, is what are the local materials that we have to hand? In the same way that I always used to teach on permaculture courses that the question should be “I’m going to cook a meal, what’s in the garden”, rather than “what’s in the fridge?”, that same principle could and should apply to building materials.
So, as the first part of the design process, and as part of what will form a key part of the brief for whoever ends up being the project’s architect, will be a list of the local materials available to such a project in Totnes. We have commissioned a specialist in this to draw this up, including the places locally where they would be sourced. My initial list off the top of my head is:
Timber: for construction grade timber, internal studwork, window and door frames, roofing shingles, laths, panelling, flooring, wattles, wood fibre insulation.
Clay: for rammed earth construction, cob walling, daubs, clay plasters, cob bricks, clay paints
Hemp: for use in hemp/lime construction, to make insulation, for hemp/lime or hemp/clay plasters and bricks
Slate: for roofing
Stone: for foundations, walls,
Reed: for thatching roofs, and also to make ‘reedboards’, an alternative to plasterboard
Lime: for plasters, mortars, renders, as well as in construction systems such as hemp/lime
Straw: baled, and used in ‘straw bale building’, chopped as an ingredient in plasters
Sheepswool: insulation
Horse hair/other fibres: used to strengthen plasters
Recycled Materials: newspaper processed as an insulation product, car tyres, recycled bricks
It used to be that when a cathedral was built, a temporary village was built around it, with a stone masons’ quarter, a timber framers’ quarter and so on. On the scale of something like the Atmos project, it may well be possible to do something very similar, processing the timber needed on site, making cob blocks, even hand-making tiles for external cladding. If done skilfully enough, integrating training and apprenticeships, it could be a vitally needed new approach to development, especially when combined with the potential for the community to invest into the development.
Panels at Charing Cross tube station in London showing the various trades associated with the construction of Charing Cross in the late 1200s.
A development that from the outset seeks to source it’s metaphorical cake locally. As the Euro crisis continues to unravel at a pace, as the academics are telling us that the only thing that will halt climate change is a massive economic downturn, or at least a huge rethink about how we make economic activity happen, we need a new approach to development.
Work in progress: Cob walls, hemp plaster on the walls, clay plaster onto lath on the ceiling, local timber window frames…
Could it be that we could create new housing, and new work spaces in such a way that each new development produces houses that lock up a lot of carbon in terms of their materials, generate very little carbon during their inhabitation, which create a diversity of new enterprises and livelihoods, show what deep public consultation in relation to development really looks like, all kinds of trainings, opportunities for people to invest in and benefit from the development, which create a huge sense of excitement and anticipation, invites the local community to get involved at regular stages and which create buildings and developments that feel timeless, rather than bound to a particular short-lived era of architectural fashion? I think so. I think the time is right for that, and that’s what we want to do with Atmos. Watch this space.
Originally published at Transition Culture


Next time you find yourself in traffic, try this nifty thought exercise. Ignore the cars within your field of vision and imagine instead the contents of their fuel tanks. Visualize gasoline flowing up and down the highway.
While waiting to see how the Iranian nuclear confrontation and the various Eurozone crises sort themselves out, there is time to step back and look at the interaction of the major forces that will shape our future. While the problems of oil depletion are already upon us, shrinking resources are only a part of global dynamics currently.
The Williams River was so languid and lovely last Saturday morning that it was almost impossible to imagine the violence with which it must have been running on August 28, 2011. And yet the evidence was all around: sand piled high on its banks, trees still scattered as if by a giant’s fist, and most obvious of all, a utilitarian temporary bridge where for 140 years a graceful covered bridge had spanned the water.

A group of scholars at the University of Wisconsin recently counted nearly 30,000 cooperatives in the United States operating at 73,000 locations. The vast majority are consumer cooperatives, with 343 million memberships (many people belong to multiple co-ops, hence the number of memberships exceeds the U.S. population). Another 7 million memberships can be found in producer and purchasing cooperatives. Credit unions, which are essentially banking cooperatives, have 92 million members. Electrical utility co-ops reach 42 million Americans. Agricultural cooperatives have three million members.



For nearly a century local investing has been essentially illegal, and Wall Street has monopolized all the investment options for the average investor. Thanks to the JOBS Act that President Barack Obama recently signed into law, local investing in job-creating small businesses is now legal.
One of the more transformative technologies ever developed for the world’s poor farmers is a water-lifting device called a treadle pump.
By Bill Bigelow and Bill McKibben
A Broken Narrative




Darell Duppa, a late nineteenth century pioneer of the American Southwest, may barely warrant a historical footnote, but he left one memorable legacy:



McKibben: Well, you know, it’s going to be hard to gin up the “Environmentalists for Romney” campaign… The calculations they were making in the fall, I’m sure, when they were responsive on Keystone, was, “We need people to be enthusiastic.” It’s a different stage now, and he’s campaigning. And the true ugliness of the GOP guys is clearer probably than it was on these issues. The thing that we all have to get out of the habit of is thinking, “Elect the right guy and we’re OK.” But if you elect the right guy then the definition of the right guy is, “He might listen to you if you put enough pressure on him,” OK? You could put endless pressure on Rick Santorum and nothing would happen. This is a guy who is campaigning with a piece of shale rock as his prop.
With global warming driving down the demand for natural gas as a home heating fuel and natural gas drillers producing record amounts, an oversupply situation has developed quickly. Stocks of natural gas are rising. As a result natural gas prices have fallen way below profitability and drillers are scrambling to cut back production.

There is a lot of talk recently that "tight oil" as found in North Dakota’s Bakken and other shales in the Southwest will save America from stagnant global oil production and increasing gasoline prices. The current glut of natural gas which has brought prices to a 10-year low has forced companies drilling for gas to curtail their activity and move the crews and rigs to North Dakota and Texas where money can still be made in drilling for shale oil. New well completions in North Dakota are expected to surge again this year.
If current population trends continue . . .
News flash: The culture at Goldman Sachs is “toxic and destructive,” and “purely about how [Goldman Sachs] can make the most possible money off of [clients].”
With the EU’s debt crisis and the Iranian confrontation relatively quiescent, attention has turned to the incessant increase in U.S. gasoline prices. The Capitol Hill gas station, where at least some members of Congress fill up, is currently selling regular for $4.49 a gallon. If you prefer to do business at the Watergate Exxon it will set you back $5.39 for regular. For a real taste of the future, then be sure to come in a full-sized SUV with a big V-8 and a 33 gallon gas tank – a fill-up will only be $188 for premium.
I seem to have done rather a lot of talks in schools recently. I did one last week which included showing clips from the film ‘In Transition 2.0’ and talking about all kinds of stories from Transition initiatives around the world. It was also the first one I have done yet where no-one was texting at the back of the room, which was a nice change (might one assured way to raise educational standards in schools be to make sure none of them have a mobile phone signal? Bit radical.) One of the questions I was asked was about how Transition got started, a question I am asked with alarming regularity still). It got me thinking about the whole question of getting things started.

World coal production and consumption data for 2011 are not yet compiled and published, but one key number is in. China’s Ministry of Industry and Information Technology reports that the country’s coal output rose 8.7 percent from 2010 to reach 3.88 billion short tons last year. For comparison, US consumption in 2010 was 
[Excerpt]: In one sense, the analysts who forecast that “peak oil”—i.e., the point at which the rate of global petroleum extraction will begin to decline—would be reached over the last few years were correct. The planet is running short of the easy stuff, where you stick a drill in the ground and crude comes bubbling to the surface. The great oil fields of Saudi Arabia and Mexico have begun to dwindle; one result has been a rising price for energy.
It has been six weeks since we last discussed the problems that could be in store for the U.S.’s East Coast due to closing of refineries in the Philadelphia area.