M&M Timber managing director Nigel Poyner said: "New customers are heeding the cost advantages of using only sustainable Class 4-treated timber for ground contact application."
His business, near Kidderminster, mostly supplies timber for play equipment and agricultural fencing, but many of the new orders are for the garden and leisure markets.
M&M Timber's products are British grown, kiln dried and sand finished. It recently invested £100,000 in developing its 9ha site including a 1,000sq m building for new processing machinery.
Poyner said the upturn in business meant he planned to hire more staff next year.