Repairing Damaged Mortar Joints in Masonry

Mortar joints in masonry can break down when water collects in them and freezes. The repeated freezing and thawing makes the water expand and shrink. That process creates cracks in the joints and can spread damage over time.

As the mortar worsens, pieces may spall, or break off from the joint sur...

A masonry wall, when exposed to rainwater, often collects water in the mortar-filled joints of the wall.

The water collected in the joints, when subjected to repeated expansion upon freezing and subsequent melting upon thawing, develops cracks in the mortar binding the masonry units.

Eventually, the mortar in the joints splits and ...