Pointing
/ ˈpɔɪntɪŋ /
Also known as: repointing, mortar pointing, tuck pointing, weather struck pointing
Definition
Pointing is the mortar finishing applied to the exposed face of the joints between bricks, blocks, or stone in masonry walling. It seals the joint against water penetration, contributes to the structural integrity of the wall, and determines much of the finished appearance of the brickwork. The profile of the pointing - the shape of the mortar face - affects both weather resistance and aesthetics.
In practice
Common pointing profiles include: weather struck (angled to shed water away from the brick below), bucket handle (half-round tooled - the most common modern finish), and flush (used on softer stone where tooling would cause damage). Recessed pointing traps water and is not suitable for exposed elevations.
Failed or eroded pointing is one of the most common causes of penetrating damp in older properties. When repointing, the old mortar must be raked back to at least 15-20mm depth before fresh mortar is applied. The new mortar must be no stronger than the original - using cement-rich mortar on soft brick causes the brick face to spall as moisture becomes trapped. Pre-1919 buildings almost always require lime-based mortar.
Building Regulations
Repointing is generally not notifiable under Building Regulations. However, on listed buildings, repointing with a different mortar type or profile may require Listed Building Consent as it affects the character of the building. Historic England guidance emphasises that mortar must be softer than the masonry it binds to prevent damage.
Full Building Regulations guidanceSee also