Removing weathered pointing mortar

01:25

Weathered mortar needs to be removed and replaced as the loss of cohesion increases the risk of moisture ingress in the masonry.

• 00:09 Rake weathered mortar out manually with a chisel and if necessary, a hammer.
• 00:24 The depth depends on the repointing mortar to be used. With NHL, it is important to remove to a depth of at least twice the height of the joint.
• 00:46 Dust out debris.
• 00:58 Finish with square-cut joints.
• Throroughly rinse with water before repointing.