CRACKED WALLS
Masonry crack repair systems utilise crack stitching bars to enhance the tensile, flexural and shear capacity of cracked walls. Cracks in walls are the direct result of movement beyond that which can be accommodated by the construction materials. Typically a wall cracks where masonry is over-stressed and least restrained, such as at window and door openings or at corners. The movement that results in cracked walls is usually caused by variations in the moisture content of the masonry, or in the ground that supports it, temperature variations or by chemical reactions. Some movements are cyclic and reversible, many are permanent.
Wall cracks in masonry can be divided into three categories:
• active - (a crack which is increasing in width and/or length)
• passive (a crack which is no longer increasing in width or length) and
• cyclic - (a crack in a wall which opens and closes seasonally).
Unless you know the history of the building, and know that the wall cracks fall into the passive or cyclic categories, ascertaining the type and cause of crack can be difficult and will require the input of a structural engineer who may need to monitor the cracked brickwork over an extended period of time before a masonry repair strategy can be determined.
Masonry crack repair systems utilise crack stitching bars to enhance the tensile, flexural and shear capacity of cracked walls. Cracks in walls are the direct result of movement beyond that which can be accommodated by the construction materials. Typically a wall cracks where masonry is over-stressed and least restrained, such as at window and door openings or at corners. The movement that results in cracked walls is usually caused by variations in the moisture content of the masonry, or in the ground that supports it, temperature variations or by chemical reactions. Some movements are cyclic and reversible, many are permanent.Wall cracks in masonry can be divided into three categories:
• active - (a crack which is increasing in width and/or length)
• passive (a crack which is no longer increasing in width or length) and
• cyclic - (a crack in a wall which opens and closes seasonally).
Unless you know the history of the building, and know that the wall cracks fall into the passive or cyclic categories, ascertaining the type and cause of crack can be difficult and will require the input of a structural engineer who may need to monitor the cracked brickwork over an extended period of time before a masonry repair strategy can be determined.



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