Auckland Central Library

Allco Solution

Allco’s Role: Waterproofing for Longevity and Confidence 

Choosing the right waterproofing system was undoubtedly one of the most important steps toward preserving the iconic building, its heritage, and its contents for many years to come.  

The library’s zero fall roof set up and green roof requirement meant Allco’s Hydrotech membrane was the ideal solution for it, with the installation carried out by our experienced installers, Sansom. Hydrotech is CodeMark certified for use in zero fall applications, such as flat roofs, podiums, and terraces providing seamless performance without slope. 

The existing old membrane was removed in entirety, the exposed concrete was cleaned and prepared for the application of Hydrotech MM6125. The roofing areas, parapets and main plantroom roofs were waterproofed with a combination of our Hydrotech and Casali membranes.

A large portion of the roof area is covered by a garden systems and the remaining areas are covered by gravel ballast provide both aesthetic appeal and protection for the waterproof membrane against foot traffic.
Allco has been able to work closely with the Babbage Consultants and our applicators Sansom Construction Systems Ltd on the green roof design requirements, providing the necessary support and technical expertise throughout the project.

More than 2000 plants have been planted on the roof of the Auckland Central library in the CBD, creating the first Auckland Council “green roof” of its kind and size in the City of Sails and over the coming months, a further 300 to 400 plants will be planted to improve the overall coverage. Hopefully, it’s the start of many more green roofs in Tāmaki Makaurau.