By Kofi Adu Domfeh
Housing,
the single largest subsector of the construction industry, is a major
contributor to environmental pollution. With the high levels of energy
consumption and greenhouse gas emissions, the sector contributes to climate
change.
“Ghana
has the potential to build environmentally sound houses”, according to Dr.
Eugene Atiamo, Director of the Building and Road Research Institute (BRRI) of
the Council for Scientific and Industrial Research (CSIR).
The
indoor environment of a building is supposed to provide comport for the
occupant and this is what you get with earth blocks and burnt clay bricks, he said.
Heavy
concrete and glass houses absorb and emit a lot of heat – this prompts the use
of air-conditioners for heat resistance.
“The
compressed earth blocks are durable in the prevention of erosion and wear offs;
and can be fortified with grass husk, palm fibre or any straw to have a good
material which can withstand the elements for the next 50-60 years”, he stated.
The
first batch of 50 trainees has passed out of Ghana’s National Artisan Training
Centre in Kumasi.
The
training is aimed at upgrading the skills of local artisans in the use of
bricks, compressed earth blocks and other indigenous building materials for
construction.
Through
the support of the Minister of Environment, Science, Technology and Innovation,
about 150 to 250 artisans are expected to be trained annually.
“The
primary aim is to train as many artisans as possible because we believe with
the high price of imported building materials, this country will go back and
use the earth and bricks for construction”, observed Dr. Atiamo.
The
building engineer believes there are good green materials for building
foundation, walling and roofing construction project.
“One
thing we should be looking at is the use of biomass – off-cuts from the
sawmills, the sawdust and even the straw which we normally dump as waste; we
can turn them into chip boards and light weight materials for partitioning to
reduce the cost of housing construction”, Dr. Atiamo said.
Ghana’s
Venture Capital Trust Fund presently offers support to real estate developers
who build socially and environmentally responsible homes.
“The
total Fund size is almost $20million; they can apply and start simple real
estate for low-cost housing”, Chief Executive Officer, Daniel Duku, encouraged
investors to source the fund.
For
green technology to be adopted in poorer nations and to have scalable impacts,
it has to be low cost and affordable, according to the World Bank Group.
“Green
housing needs to appeal to a much wider audience. It must be viewed as a socially responsible and commercially viable
proposition for the common builder and developer, and an economically and
socially viable proposition for the average buyer”.
In
developed economies, “green” often entails heavy additional costs, but a large part of the existing green technology
in emerging economies like Ghana is low cost.
Unfortunately,
there are very few production units for earth and brick clay materials in Ghana,
due to lack of market. There is also lack of standard specifications to make
local building materials attractive for the built environment.
Ghana’s
policy direction is to have about 60percent of local materials in the
construction of every public infrastructure by 2015.
Dr.
Atiamo notes that government’s commitment would ensure the target is achieved.
“Even if we cannot do 60 percent, at least there should be a legal backing
which will push government agencies to use 20-30percent to encourage business
investments in local building material production”.
The national housing deficit is
presently estimated to be over 1,500,000 units, whilst government spends about
$250million annually to import construction materials.
Sustainable
green solutions with local building materials could afford the average Ghanaian
access to lower-income housing whilst safeguarding the environment.
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