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Repointing of mortar joints
The removal of defective mortar from between
the joints of masonry units and the replacing it
with new mortar.
See page 48 for types of joints.
The mortar is not intended to tie the units
together, but to separate them. The units need to
move independently. Thus it is important that the
mortar be softer than the units.
Sealant installation
Installation of material or devices used to prevent
the passage of liquid or gas across a joint or
opening.
Sealant is used instead of mortar where
movement is anticipated. Sealant will allow the
movement but will prevent the water intrusion.
The installation of sealant is critical.
Please refer to Chapter III – SEALANTS.
Maintenance
It is not uncommon to hear that natural stones do
not require maintenance. If this would be the
case, our Roman structures would still be
standing or would not need extensive restoration
today. The proper choice of stones for specific
application is vital and the proper protection of
the stones to prevent water intrusion is also
necessary.
Nothing lasts forever-not even the
stones.
END OF CHAPTER V