In many of Sydney’s older apartments the concrete flooring had a topping of magnesite added to make a smooth and level finish.

The main component of this topping is magnesia, which has a magnesium chloride content. This chloride, activated when wet, accelerates the corrosion process that leads to concrete cancer.

Common places where water makes contact with magnesite are kitchens, bathrooms, and near windows and balcony openings.

Damaged magnesite must be removed and any exposed steel replaced or treated. Depending on the scale and structural requirements, the area is then repaired to the original profile using cement mortar, epoxy mortar or concrete.

Some floors are so badly damaged that they are removed in their entirety and re-concreted.

MAX BUILD services include:

  • Internal magnesite removal