Mass Timber1 Endorsement
Top Provider StructureCraft

Mass timber is comprised of multiple solid wood panels glued, dowelled, or nailed together to create strong and stable structural building components. It’s a relatively low carbon alternative to concrete and steel.  Code changes passed for the 2021 code cycle allow mass timber buildings up to 18 stories tall.

  • CLT - Cross Laminated Timber - consists of wood planks glued together.
  • DLT - Dowel Laminated Timber - consists of wood planks doweled together.
  • NLT - Nail Laminated Timber - consist of wood planks nailed together.
  • Glulam is a structural engineered laminated wood component usually used as a beam or column.


Wood performs better than concrete and steel when it comes to air and water pollution. Wood’s advantages are recognized by green building rating systems— including certified wood, recycled/reused materials, local sourcing of materials, waste minimization, indoor air quality and life cycle impacts.

North America has more certified forests than anywhere else in the world. Modern forestry standards ensure a continuous cycle of growing, harvesting and replanting.  Strong markets for wood products encourage forest owners to keep their lands as forests and invest in practices to keep trees healthy. Forest management in the U.S. and Canada operates under federal, state, provincial and local regulations to protect water quality, wildlife habitat, soil and other natural resources. In the U.S., more forest land is lost to development than forestry.