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Specifications for Crack Repair

ASCC Position Statement #5

Some specifications hold concrete contractors responsible for crack repair as shown by the following examples: 

Prior to filling any structure with water, cracks 0.01 in. (0.3 mm) in width or greater shall be “vee’d” as indicated and filled with specified sealant; 

  • Repair isolated random horizontal cracks:
  • Less than 0.01 in. wide, using specified silane sealer; 
  • 0.01 in. to less than 0.03 in. (0.7 mm) wide, using specified methyl methacrylate; and
  • 0.03 to 0.06 in. (1.5 mm) wide, using rout and seal with specified sealant.
  • Repair isolated random vertical cracks more than 0.01 in. wide using specified epoxy injection product; and
  • Formed concrete surfaces requiring repairs shall include cracks in excess of 0.01 in. Unformed surfaces requiring repair shall include all surface defects such as crazing, cracks in excess of 0.01 in. wide, or cracks that penetrate to the reinforcement or through the member.

These specifications don’t address how, where, and when the cracks will be measured. Because the warranty period is typically at least 1 year, contractors also can be held responsible for repairing cracks that grow to the specified width while the facility is in operation.

Want to learn more? Download the full Position Statement! 

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