A good repointing job is meant to last, at least 30 years, and
preferably 50- 100 years. Shortcuts and poor craftsmanship result
not only in diminishing the historic character of a building,
but also in a job that looks bad, and will require future repointing
sooner than if the work had been done correctly.
The mortar joint in a historic masonry building has often been
called a wall's "first line of defense." Good repointing
practices guarantee the long life of the mortar joint, the wall,
and the historic structure. Although careful maintenance will
help preserve the freshly repointed mortar joints, it is important
to remember that mortar joints are intended to be sacrificial
and will probably require repointing some time in the future.
Nevertheless, if the historic mortar joints proved durable for
many years, then careful repointing should have an equally long
life, ultimately contributing to the preservation of the entire