Cracked Masonry

Cracked Masonry

Cracked Arch

Cracking can and does affect a building in a number of ways. If it is severe, it may result in a loss of structural stability. Even moderate cracking will lead to rain penetration, air infiltration, heat loss and reduced sound insulation. All these outcomes lead to a loss in efficiency of the building. Cracking of any kind is unsightly and is normally unacceptable to the occupants.

The majority of buildings will develop cracks in their fabric. This often happens soon after construction when many materials are drying-out or swelling due to moisture take-up. These initial movements, although usually minor, may continue for some years. Much could be done to minimise or even avoid cracking by recognising that movement of building materials and components is inevitable and should therefore be allowed for in design.

What are the causes of cracked masonry?

When considering the causes of cracking it must be borne in mind that there is very rarely just one specific cause. It is much more likely to be a combination of factors that will cause a building to crack. Some of the most common causes of cracking are outlined below. The list is not exhaustive. It would be almost impossible to attempt to identify every possible cause.

Cracked Masonry

Lintel Failure

Some causes include:

  • Changes in Temperature;
  • Changes in Moisture Content;
  • Freezing and Thawing;
  • Sulphate Attack;
  • Corrosion or Oxidation of Steel;
  • Moisture Expansion of Clay Fired Products;
  • Carbonation;
  • Foundation Movement; or
  • Lintel Failure.

How does Target fix cracked masonry?

Target's experienced employees can advise on all aspects of cracked masonry from identification of causes to solutions.

When considering remedial work using the Target System there is no longer the requirement to identify the single original cause. Provided that the damage is within a specific category, and the causes can be identified as lying within a specific group, the Target System solutions can be adapted to cover most probable eventualities.

Target's Bar Flex crack stitching system along with Bond Flex XL cementitious grout provides a solution to many cracked masonry problems.

The Heli Pile system used in conjunction with the Bar Flex and Bond Flex XL systems can be used when foundation problems are identified as a cause.

Cem Flex ties are also used in standard construction repair techniques for bonding across cracks in masonry and as a restraint for bowing solid walls.