Verulam (readers' letters – September 2024)

David Knight, John Armitage, David Leversha, Catherine Ramsden and Paul Sanders challenge structural engineering firms to put ethical principles – above all in respect of climate – at the heart of their business activities.

The light weight and prefabricated nature of cross-laminated timber make it an ideal candidate for retrofit and extension projects, argues Alex Lynes. It just needs to be detailed well for durability.

Jonathan Skinner, James Morton and Alan Dowdall of Ramboll describe their work to refine the inputs to an activity-based approach to calculating A4 carbon emissions for mass timber, and encourage the industry to go further by reporting actual fuel usage for transportation.