What repointing actually involves
Repointing is the renewal of the mortar in the outer part of the joints between bricks. The old material is raked out to a sound depth, the joints are cleaned and dampened as required, and new mortar is worked in and finished to a suitable joint profile.
The mortar, preparation and finish all matter. A poor match or shallow surface repair may fail early and can contribute to damage, particularly where harder mortar is used with softer brickwork.
- Rake-out depth: generally to a depth that allows the new mortar to hold, rather than a thin skim over the old joint.
- Mortar specification: the mix should suit the brick, the exposure and the age of the wall.
- Joint profile: weatherstruck, bucket handle, flush or recessed, chosen to suit the wall and shed water.
- Access: ladders, tower or scaffold, which affects both safety and cost.
