Most people know that lime is a traditional material that
has been used for many years and is more widely being
specified by conservationists and architects. This is
because it is now widely recognised that hard cement mortars
and gypsum plasters are not appropriate for a traditional
constructed building and that modern materials can in fact
cause serious damage to the fabric of such a building. Some
insurance companies have recently been known to reduce the
sums claimed by householders where the damage compounded by
the use of inappropriate materials.
It is not just traditional building repairs that benefit
from the use of lime. New build and our environment can
benefit. Traditional lime plasters are more porous and can
absorb moisture
from the air. When
used with a breathable paint this can reduce the possibility
of condensation in the home. This increases porosity also
offers an improvement in acoustic insulation. Many millions
of bricks are fired annually using a huge amount of energy.
The vast majority of these bricks will be laid with cement
mortars and are destined never to be recycled apart from the
use of hard core.
The energy used in the production of lime is also less than
that for cement. Lime also sets by carbonation, reabsorbing
most of the carbon dioxide releasing from the limestone as
it is burnt. With greater moral and legal emphasis being
placed on more environmentally friendly options in every
aspect of life, lime could be a major contribution to
reducing the adverse effects of our throw away, carbon
producing society.