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Case Study

K-Series - Dyer Residence Griffith Act

  • Retrofit and extend 1952 monocrete residence
  • Apply K-Series to existing monocrete structure and timber frame extension
  • Achieve superior thermal performance and energy efficiency
  • Mitigate the risk of bushfires
  • K-Series system
  • Blended the old and the new
  • Modernised with super-high performance architectural finish
  • Realised lower energy costs relating heating and cooling
  • Achieved weather-tight building envelope with  insulative and sustainable solution

Superior thermal and fire performance achieved in 16 days with owners realising substantial energy savings.


In Griffith, a surburb of Canberra in the Australian Capital Territory (ACT), the owners of a 1952 residential property decided to retrofit and extend their home to enhance usability and significantly improve energy efficiency and thermal comfort. Summers are hot with temperatures often reaching the 40s, while winters are cold with temperatures below zero occurring regularly.

“Before beginning the renovations, we researched high performance insulation solutions,” says Selby Dyer. “We wanted to make our home as energy efficient as possible, so we could be cool in summer and warm in winter, without having huge energy bills. We came across K-Series and felt it was ideal as it would give us the energy performance we were after and allow us to blend the old with the new renovation.

“We were also very conscious about fire safety given the leafy surrounds of our home, so the fact that K-Series is rated to a Bushfire Attack Level (BAL) 40 was extremely attractive to us. And, we liked that the 50mm K-Series panels provide almost twice the thermal value of 50mm polystyrene panels, without encroaching too much on our eave width.”


The unique challenge facing Igloo at the time of installation was fitting the K-Series system to the old masonry walls. According to Remi Verchot, Managing Director of Igloo Building Systems, “This was something that had never been done before in the ACT. In addition, we needed to fit the system to the new timber-framed extension and ensure we achieved a seamless transition between the old and new materials.

“We worked very closely with the Dyers before starting the project to accurately specify requirements and highlight any challenges or issues that might need resolving. This enabled us to assist the Dyers in ordering the most effective window profiles for the new extension that would complement the rendered finish. We also made recommendations for some of the old plumbing to be removed and in some instances relocated, to facilitate a smoother installation.


The Dyers settled on the 50mm profile of the K-Series insulated cladding system. Incorporating Kooltherm® panels, K-Series has been specifically formulated for the Australian market. With almost twice the thermal value of polystyrene panels, no other product on the market achieves this level of performance with equivalent wall cladding thickness.

“The Dyers have transformed the aesthetic value and performance of their existing home,” explains Remi. “This was a particularly rewarding project as we saw it evolve from an outdated and cold structure to what has become a beautiful home. There’s certainly nothing cold about it now, in any sense of the word. It’s warm or cold when it needs to be and the overall rendered finish has transformed the home into a modern and well-appointed residence.

“This is a great example of what can be achieved in retrofitting old structures with K-series.”


While aesthetic appeal wasn’t the primary concern for the Dyers, they are happy with the project’s outcomes. Selby says, “We’re extremely pleased with the way the new rendered façade has lifted the appearance of our home. We have achieved an architectural finish that not only adds value to the property but also packs a punch in terms of energy performance and fire safety.

“For us, the key benefit is the high-level of thermal efficiency we have realised. K-Series, in combination with the new roof and double-glazed windows, has given us an extremely comfortable home to live in. We’re also benefiting from incredible savings in energy costs and reducing our carbon footprint, while having confidence that we are well protected in the event of a fire.”

Remi adds, “By investing in quality external insulation to improve thermal efficiency the Dyers are maximising the value of their 60-year old home. By adopting the three Rs principle, they have reused a solid structure with good bones and transformed it into a sustainable and contemporary home.”


For homeowners retrofitting or renovating in a climate driven world, there is an imperative to improve energy efficiency to optimise running costs over the long-term and improve sustainability.

“Thermal efficiency has led to consistent air comfort for the Dyers,” adds Remi. “K-Series has resulted in a tightly sealed and insulated building envelope that reduces air leakage and contributes to steady indoor temperatures. This has increased the Dyers’ comfort level all year around.”

Selby adds, “Overall, K-Series has given our home a modern facelift with the added value of energy efficiency, fire safety and thermal comfort.”

“Timing was another factor that needed to be considered. We had 16 working days to install the system and complete render- works to keep in line with the overall building program.”