Building Magazine – Just how good is wood?
By Thomas Lane, 20 October 2021
With the industry under pressure to decarbonise construction, more and more firms are turning to timber. In the third in our series on materials, Thomas Lane looks at whether wood really is the panacea many claim it to be
If there were an award for the most versatile product in the history of construction, then timber would be the clear winner. Readily available and self-generating, it is light, strong, easily worked, durable, visually appealing and highly versatile.
Sawn lengths are good for building frames, roof structures, floors, doors, windows, cladding and furniture. In sheet form it is useful for floor decks, partitions, site hoardings and furniture. And, when lengths of sawn timber are glued together to make very strong and stable engineered timber products such as CLT or glulam, it is suitable for building large structures. So, it is no surprise that UK construction gets through 17 million m3 of timber every year.
The push to decarbonise construction is driving the industry towards greater timber use and specifically structural timber frames. Buildings are traditionally constructed from carbon-intensive steel and concrete, which means the structure can account for half of a building’s upfront carbon. Switching to timber has a potentially massive carbon benefit and, according to Timber Development UK, only 1% of structural frames are made from engineered timber such as CLT or glulam.
So, in theory, there is plenty of scope to cut emissions from construction by using more timber. What are the carbon savings from using more structural timber and is it a panacea for the carbon impact of the industry?