This residential strata complex was riddled with waterproofing defects when CJ Duncan began a five-month upgrade to the building. Our project team removed approximately 300sqm of defective waterproofing membrane and replaced this with state-of-the-art monomeric PVC membrane. True to CJ Duncan’s ‘belts and braces’ approach to waterproofing, the project team installed a secondary waterproofing membrane of liquid latex. This ‘sandwich’ waterproofing technique ensures that the tiling screed remains dry during wet weather, hosing etc., and avoids unsightly efflorescence running down the facade of the building. New brick parapets and expansion joints were installed to ensure this robust waterproofing solution would not fail in the years to come.

To finish the job, the newly waterproofed roof sections were flood tested for several days with the water in each roof section dyed a different colour. This ‘colour coding’ enabled the project team to track any leaks back to a particular location. Needless to say, the project team’s rigorous approach ensured that the flood tests held tight and not a single drop of dyed water penetrated the newly sealed concrete roof deck.

For more information on this project or, if you have another project you’d like to discuss, please get in touch.