Standard Flat Roof System

Hall of Memories Wellington

ArchitectStudio of Pacific, Wellington
ContractorFletcher Construction
Specification3 X 10mm of mastic asphalt tanking to foundation beams


The existing Gummer and Ford Designed National War memorial Building in Wellington was undergoing a seismic upgrade and had to be completed by the Anniversary of Anzac day. The existing 70 year old building in Wellington had existing mastic asphalt Tanking membrane which was in impeccable condition. Studio of Pacific Architects wanted to re-instate all the same products due to the Historical Nature of the Building. Therefore due to our expertise in the industry Asphaltech was engaged to complete new mastic Asphalt Tanking and tie into the existing Tanking.

Due to the product being molten and monolithic it was easy to reinstate the product and tie it into the existing structure. In this project it was shaped around many tricky details.


To apply 3 layers of mastic asphalt tanking to new structural beams and tie into existing mastic asphalt membrane. Great care had to be taken during preparation of the existing membrane so a good bond was achieved between existing and new mastic asphalt. Whilst on the project we were asked to replace the existing small winged roofs with Pacoflex Mastic Asphalt which was laid in 2X10 mm with a solar reflective protective coating.

Asphaltech team of 3 qualified tradesmen with a combined 80 years’ experience were intrusted to carry out the installation of the mastic asphalt tanking and roofing where there was detailing to complex shapes and difficult working conditions. Throughout the project we consulted on design and detailing.

"George Griffiths personally supervises his small team, who all work to highly professional standards ensuring that the exacting detailing required by the Museum's heritage architects is always met or exceeded. "
JOHN GLEN, Auckland Museum Facilities Manager // AUCKLAND WAR MEMORIAL MUSEUM
"Mastic asphalt has a long life span of 60 years (source RICS). Fully recyclable, it has a low impact on the environment. Benefits of mastic asphalt are its durable, waterproof, voidless and self compacting."
Pure Asphalt Company Limited – UK