Re-pointing is the process of renewing the pointing which is the external part of the mortar joints. In masonry construction, over time, weathering and decay cause voids in the joints between the brickwork allowing the penetration of damp and moisture, Water entering through these joints can cause significant damage through frost weathering and salt deposition. Damage can also occur more rapidly in built-up or urban areas as can the previous inappropriate use of Portland cement (OPC) Aspire restoration ltd fully understands every building's needs and our work is always faithful to the traditional roots of that building and its intended design. On some of our projects in the past, we have had the benefit of working alongside some of this country’s most respected voices on this subject and are grateful for their invaluable knowledge that has been passed down to us.
Source: https://aspirerestorationltd.co.uk/re-pointing/