RM Watson Concrete Repair, Collaroy

In Collaroy, a unit complex faced concrete spalling issues, leading to waterproofing problems impacting the balconies and some internal units. The cause of the extensive damage was magnesite.

• A Consulting Engineering report was completed, with recommendation to significant repairs for most of the balconies and some units affected by concrete spalling caused by magnesite.
  
• Following on from the spalling repairs all the units and balconies required waterproofing to ensure the minimisation and prevention of future issues.

• Sika Monotop 412 NFG was specified as the concrete repair mortar.
• Sika Monotop 910N was specified as the corrosion inhibitor for the steel reinforcement and as a primer for the 412NFG.
• Moisture Seal 2k was used as the primer and Sikatite Undertile as the waterproofing membrane.