The big news on on the stand was the new research revealing that windows made from the modified wood are carbon negative.

"Even though the timber is shipped from New Zealand, the windows are carbon negative. This outperforms many other softwoods and hardwoods," said Bryan Crennell, director of sales and marketing.

The cradle to grave analysis, carried out by Delft University of Technology, found that Accoya window frames are CO2 negative over the full life cycle of the product, mainly as a result of limited emissions during production and carbon sequestration of the wood.

The news was also being celebrated by Carey Glass Joinery, which has just supplied 850 Accoya windows and doors for the reburbishment of Carradale House, a Grade II listed residential tower block in Tower Hamlets, London.

"It shows the validation we’re getting," said Mr Crennell.

The new research follows the news that in the nine months ending December 2012, Accsys reported a 36% increase in revenue to €13.4m.

"Sales in the joinery sector are growing, which is a key market for Accoya," said Mr Crennell. Sales of Medite Tricoya were encouraging and "above expectations", he added.

Accsys now has distributors in 41 countries and a conditional licensing agreement for a second Accoya plant in Europe.