Magnesite Removal And Floor Topping

Rod Finlayson Remedial Building

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Magnesite Removal And Floor Topping

Magnesite floor coverings are a widespread trend for homes built during the 1960’s and 70’s. Magnesite is a form of cement mixed with other materials, with its main component being magnesium chloride. A variety of fillers can be used including wood chips, sawdust and synthetic materials which causes the concrete to be prone to rust. Used as a floor topping or underlay to carpets, the floor structure begins to slowly corrode due to decades of exposure to moisture and water ingress.

How does it happen?

Magnesite flooring is composed of magnesium chloride, which is prone to sweating moisture. When exposed to household moisture and water ingress, the magnesite begins to diffuse ions that begin to corrode metal support structures and creates concrete spalling.

Concrete cancer and spalling is most commonly found in floors around balconies, kitchens, bathrooms and windows. Constant exposure to moisture in the air and water from rainfall damages the flooring more than you know. Deteriorating magnesite comes in many forms, with extensive damage able to be seen on the exterior of carpets and flooring. Signs to look out for include:

Why fix it?

Corroding magnesite can result in a floor needing to be completely repaired and re-concreted. Concrete cancer and spalling can threaten the strength of surrounding balconies and major structural supports of the building.

Our services include the mechanical removal of magnesite that has not adhered to the slab correctly or has been damaged due to water ingress. We use several different brands of cementitious floor levellers to repair floor toppings and to prevent any corrosion.