If you notice that the mortar between the bricks on the chimney stack has perished it
should be replaced. Failure to do so could result in rain penetrating the brickwork,
and damaging the mortar further. Remove any cracked or crumbling mortar. The stack
is now ready for pointing. For full details on the mix of mortar required for repointing
and the method of application refer to the Outdoor projects section.
