Stone veneer – cracks in the lintel

Cause

Corrosion of steel lintel bar supporting the stone

Repair

  • if lintel corrosion is not severe, remove corrosion by sanding or brushing with a stiff bristle brush; apply zinc-rich primer and a minimum of two coats acrylic paint
  • monitor crack width for one month
    • if cracking increases, consult a chartered professional engineer
    • if it remains the same, replace damaged stone as necessary

Cause

Differential settlement of the building caused by swelling/shrinking of clay soils and inadequate foundations

Repair

  • monitor crack width for one month
    • if cracking increases, consult a chartered professional engineer
    • if it remains the same, replace damaged stone as necessary

Cause

Building subjected to vibration movement such as earthquake, high wind

Repair

  • monitor crack width for one month
    • if cracking increases, consult a chartered professional engineer
    • if it remains the same, replace damaged stone as necessary