Repointing
Repointing
brickwork is a highly skilled craft. It describes
the process of removing deteriorated mortar from
the joints of a brick wall and replacing it with
new mortar.
The
decision to do this is most often related to some
obvious visual signs of decay, such as disintegrating
mortar, cracks in mortar joints, unsecured bricks
or stonework, damp walls, or damaged plaster work.
As a general rule of thumb, if the mortar can easily
be scraped out between brickwork or stonework, then
it's likely that the wall will need repointing.
Over
20% of any wall is made up of mortar joints. In damp
conditions the wall is liable to absorb the damp
and subsequently dries through evaporation. Lime
mortar joints
are
generally
more absorbent than brick or stone and draw most of
the moisture into them, which then evaporates away
safely.
Most of the damage
from salt crystallisation and frost consequently
happens in mortar joints, which can easily
be repointed.
If however, the joints are replaced with harder and less
porous cement mortar the water is forced to evaporate
mainly
from the brick or stone and damage will inevitably
result.
Cavi - Tie provide clients with a suitable analysis
of whether a wall needs
repointing, the raking out of existing mortar, preparation
of the wall, mixing suitable lime mortars and the process
of pointing.
We use gun injection to ensure that mortars go exactly
where they are needed, deep into joints up to 75mm.
This ensures there are no unseen air pockets for water
to collect and therefore no risk of consequent frost
damage. A high quality finish is achieved in a minimum
timeframe.
Cavi
- Tie work can be trusted to be within the British
standard mortar guidelines. We use traditional lime
putty mortars, coloured mortars and mortars that
contain improved bonding to brickwork to ensure that
our work will last for years to come. We use a variety
of power tools to ensure a proper depth of rake of
the old mortar and state of the art mortar guns to
ensure new mortar is thoroughly put back into the
joint.
All
our work is cosmetically pleasing and we don't leave a mess when we're finished!
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Gun
injecting mortar
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Mortar
deep in joints
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