When Victoria ceased native timber harvesting, it didn’t just hit sawmills. It also impacted the value chains that depend on them — including the up to 200 Australian joinery companies that still manufacture timber windows and doors. The testing programme reflects broader sector adaptation to supply constraints, as Wood Central reported when ASH launched CASE to redirect hardwood fibre from export markets into Australian residential construction.
Now, Australian Sustainable Hardwoods (ASH) — the country’s largest hardwood processor — says a $600,000 AFWI-funded research project is helping the industry find its way forward, with new species, new engineered products and new performance data that could change how timber windows are specified in Australia.
Daniel Wright, ASH’s National Business Development Manager, told Wood Central that window manufacturers are a big part of the company’s supply chain — from commodity and painted windows through to high-end architectural manufacturers — mostly across south-eastern states, but with a growing presence in northern New South Wales.
And Wright said the fallout from the decision to cease harvesting in Victorian forests has been immediate. “The window manufacturers of south-east Australia have been forced into a lot of change with the cessation of native timber in Victoria — just like we have,” he said. “But they also have upcoming changes to the NCC, which will structurally change how many of them operate.”
“Of course, what impacts our supply chain also impacts us.”
That disruption created confusion. “We’ve recently seen imported plantation timbers in the window market that don’t meet the specs they are intended for,” Wright said. “This was a direct result of Victoria’s hardwood being suddenly ceased. The window makers were trying to do the right thing, but were forced to make quick decisions.”
As one of the major stakeholders in the AFWI–AGWA Modernising Timber Windows project, led jointly by the Timber Development Association and the Australian Glass and Window Association, Australian Sustainable Hardwoods is providing timber species for testing their performance in modern systems.
“When we were asked to be involved, we saw this project as an opportunity to work together and help the window makers collectively find pathways forward that not only suit their specific needs, but also comply with upcoming changes to the NCC,” Wright said.
The project is also a chance for ASH to advance one of its newer species — Plantation Oak — as the company rebuilds markets lost when Victorian ash was taken away. Made from Shining Gum logs grown in a plantation for pulp, Plantation Oak is upgraded by ASH into higher-end, longer-term applications. Wright said a small part of every log can be used for architectural applications, but the majority needs to be engineered to get the best out of it.
“We’ve had success with Plantation Oak in MASSLAM, but in order to use this fibre in other market segments, we need to help build the standards and examples that everyone can follow with confidence,” he said. ASH is one of 10 timber suppliers involved in the project, alongside the Pentarch Group and others.
Now, the testing programme is about to shift up a gear.
Speaking to Wood Central today, Kylan Low — the Structural Engineer at the Timber Development Association leading the project — said next week’s round will put four configurations through their paces: a double-hung window, an awning and casement window, an awning and double casement window, and a centre bifold door. Low said the configurations are designed to capture various hardware setups used across the industry and will be tested under combined air and water pressure for durations representing storm periods.
In January, Low told Wood Central that the industry had been craving this kind of data for a very long time: “Window data hasn’t kept up with changes in codes, glazing, and timber supply.”
The project has also given a platform to the next generation. Jesse Ross — a Graduate Engineer at AGWA who has been working alongside Low since the project’s inception — recently shared his reflections on what has become his first major engineering project. Ross said that, unlike uPVC and aluminium systems, there was no prime operator in the timber window sector, meaning the entire system had to be built from the ground up.
Early testing revealed that some Australian hardwoods, such as Spotted Gum and Blackbutt, could outperform European staples. But given the project’s focus on species substitution, the team chose to work with the lowest passing species it could find. Designs have settled on 55/58 mm sash profiles with 24 mm glazing pockets, accommodating modern insulated glass units and manufacturable by small-scale workshops.
Ross said the industry engagement phase — travelling to state forums, meeting joiners, hardware suppliers and timber providers — was one of the most eye-opening parts of the experience. He found some joineries still working with outdated designs that didn’t fully comply with AS 2047 or accommodate drained insulated glass units.
“I learned that innovation is not just about creating new ideas,” Ross wrote, “but also about making them accessible to your audience.” The documentation phase — technical manuals, substitution procedures, shop drawings — is now underway, aiming to give any Australian joinery everything it needs to start building with confidence.”
The Modernising Timber Windows project is one of 30 research initiatives funded through AFWI — a $200-million-plus institute backed by $100 million in Commonwealth funding. It is generating new structural and performance data across a range of solid and engineered wood products, testing how timbers perform under AS 2047, Australia’s mandatory standard for windows and external glazed doors.
- To learn more about the Australian Forest and Wood Innovations programme, visit AFWI’s dedicated website.
