From Harvest To Housing: CLT Locks Away More Carbon Than It Emits - CleanTechnica

The article from CleanTechnica discusses the carbon accounting of cross laminated timber (CLT) and its potential as a carbon-negative building material. CLT stores significant amounts of carbon absorbed by trees during growth, locking it into building structures for as long as they stand. Although emissions occur throughout the CLT lifecycle—from harvesting and transport to drying, adhesive production, and assembly—the amount of carbon stored in the wood far exceeds these emissions. For example, producing one cubic meter of CLT emits about 120 kilograms of CO2, while the wood stores nearly a ton of CO2, making CLT net carbon negative from cradle to gate according to Canadian Environmental Product Declarations (EPDs). However, current carbon accounting standards often separate stored carbon from emissions rather than netting them, due to uncertainty about the wood's end-of-life fate. If wood is incinerated or landfilled without proper gas management, stored carbon is released back into the atmosphere. Conversely, reuse, recycling, or conversion into stable