The new operation launched in 2011 after the companies had worked together on projects for a number of years. It has since won some "substantial" contracts and says that growth is accelerating.

It reports turnover for the last quarter 50% up on the same period in 2011, and its first half 2012/13 sales now 36% ahead of the whole of last year.

"Demand for cross-laminated timber is growing rapidly as the construction sector increasingly recognises its aesthetic qualities and other multiple benefits," said B&K managing director Nick Milestone. "Last financial year 45% of our projects used CLT. That has increased to 70% in the first half of this financial year."

Two recent X-LAM projects include Furness Academy, its biggest contract to date using 3,000m3 of CLT, and Cambourne College, comprising 1,000m3. Both were completed on time and within budget, despite poor weather throughout the winter. The former was delivered in 19 weeks, the latter in 12.

The business now has a range of other new projects in construction or at design or planning stage.