Repointing is the process of renewing the pointing (the external part of mortar joints).  Over time, weathering and decay cause voids in the joints between masonry units (usually bricks), allowing the undesirable entrance of water.  Water entering through these voids can cause significant damage through frost weathering and from salt dissolution and deposition.  Repointing is also called pointing, or pointing up, although these terms more properly refer to the finishing step in new construction.

It is essential that the mortar used for repointing have similar performance characteristics to the original mortar used in a building.  Such performance characteristics include permeability, compressive strength, and coefficient of thermal expansion.  For instance, if a soft lime-based mortar was originally used, the most appropriate repointing mortar is likely to also contain a large amount of lime.  The use of Portland cement mortar for repointing on older buildings with soft masonry units can cause significant damage due to physical incompatibilities.

Why Repoint?

A common maintenance task for brick or stone walls is the repair of mortar joints.  The life of mortar joints will vary with the exposure conditions and the mortar materials used, but a lifespan of more than 25 years is typical. The life of brick or stone, however, may well exceed 100 years.  Consequently, occasional repair of the mortar joints is expected over the life of the brick or stone wall. It is our observation that the most common reason for repointing brick masonry is to improve water penetration resistance.  Repointing deteriorated mortar joints is one of the most effective and permanent ways of decreasing water entry into brickwork.  This is because the most common means of water entry into a brick masonry wall is through debonded, cracked or deteriorated mortar joints.

We can cover all your pointing needs

  • All walls and stonework
  • High-level
  • Low level
  • Tower blocks
  • Silos
  • No building to large
  • church's
  • tower blocks and high rise

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