These days,
you spend your life paying off a house, and even building a shed or animal
shelter can be expensive, as timber, brick or any other modern building
material requires a heavy investment of money, time and skilled labour. For
thousands of years, though, people used a simpler technique that used nothing
but natural, local materials.
“Wattle and
daub,” as it’s called, takes its name from its two components; a “wattle” was a
wicker fence or wall made of a pliable wood like willow or hazel, woven around
upright posts like a horizontal basket. Farmers sometimes surrounded their
fields with wattle fences, which could be made in modular, lightweight pieces a
metre or two high and a metre or two across – hurdles -- and then uprooted,
carried to a new location, and stamped into the ground where needed.
The farmer
usually created a wattle by putting the upright posts (sometimes called zales
or sails on these islands) into a wooden frame (sometimes called a gallows) to
hold them in place. Then withies – slim cuttings of willow or hazel – were
wound back and forth around the uprights. At the end of the hurdle the withy
would be twisted for greater flexibility, wound around the last zale, and woven
back in the other direction. Usually a gap would be left in the middle of the
hurdle, called a twilly hole, which allowed a shepherd or farmer to carry a few
hurdles as a time on his back.
According to
author Una McGovern, hurdle fences were vital to medieval agriculture; by
keeping sheep confined without the need for permanent infrastructure, they
allowed tenant farmers to graze sheep on a patch of land, letting them manure
the fields one by one and deposit the fertilisers necessary for cereal crops.
The same
technique could form the walls of a building, once a log or timber frame was
built and the wattle filled in with a “daub” plaster for insulation and
privacy. The daub often contained clay, human or animal hair and cow dung, and
hardened around the wattle like concrete around rebar. The technique proved
popular throughout the ancient world, among Sumerians, Chinese and Mayans
alike. If kept dry the walls would last for centuries, and even now restoring
or demolishing old buildings in Europe sometimes reveals wattle inside the
walls.
Not all
ancient builders loved it; the Roman architect Vetruvius, in the first century
BC, moaned about its hazards in his Ten Books on Architecture:
“As for
‘wattle and daub’ I could wish that it had never been invented,” Vetruvius
wrote testily. “…But since some are obliged to use it either to save time or
money, or for partitions on an unsupported span, the proper method of
construction is as follows. Give it a high foundation so that it may nowhere
come in contact with the broken stone-work composing the floor; for if it is
sunk in this, it rots in course of time, then settles and sags forward, and so
breaks through the surface of the stucco covering.”
Vetruvius’
disdain notwithstanding, however, clearly many of his contemporaries loved it,
and it’s easy to see why; it allowed people to build a structure cheaply and
easily. The main disadvantage, as the Roman mentioned, is that it cannot get
damp; like cob, straw bales or other natural building methods, it works best
when you build the foundation and walls of rock for the first metre or so.
The
technique is similar to building in cob, that mixture of sand, straw and clay,
mixed with water and squeezed together – usually by humans walking on it. Handfuls of the mixture – the word “cob” comes
from an Old English word for “lump” – are stacked them on top of each other in
a row, stomped solid by people’s feet, and then another layer of cob added,
until people have a wall.
The straw
binds the clay and sand together; instead of a wall’s mass hanging on a few
large structures like girders or beams, it hangs on the many tiny structures of
the straw. Once the cob dries it can be almost as durable as stone. Daub needs
to be thinner than cob, like stucco or plaster – to be spread across the wattle
rather than creating a self-supporting wall – but is can be made from quite
similar materials.
Of course,
wattle and daub is probably not suitable for modern homeowners unaccustomed to
mud walls. That doesn’t mean, however, that it has no relevance to today’s
homesteader; animals don’t tend to mind such all-natural surroundings, as long
as the interior remains warm and dry, and neither do garden tools.
Building
techniques like cob or wattle-and-daub fell out of favour in the modern era
because they are more labour-intensive than our modern building techniques that
rely on fossil fuels. We should not let such skills disappear entirely,
however, for these methods still have advantages. They are completely
ecological, requiring no machines, and generating no pollution. They can last
for centuries, as evidenced by homes built this way in Europe – and might still
stand when our reinforced concrete has collapsed to ruin. And when a
wattle-and-daub home is finally torn down, it merely adds fertiliser to the
soil, rather than toxic waste – and another one can be built, literally dirt
cheap.
References:
Una
McGovern, Lost Crafts, published by Chambers, 2009.
Vetruvius,
Ten Books on Architecture, Chapter 8, Section 20.
Photo: Cottage in Heimbach, Germany.
Photo: Cottage in Heimbach, Germany.