Carbon Leadership Forum Material Baselines for North America 2025

About

The 2025 CLF North American Material Baselines project continues the work of and builds upon previous CLF Material Baselines reports. This report aims to support decision-makers by providing:

A methodology for:

• categorizing products for appropriate embodied carbon comparisons;
• collecting and processing embodied carbon data from EPDs; and
• assessing data sources for their industry representativeness and estimating industry-average embodied carbon values (i.e., “baselines”) per product type.

Category results, including:

• a “state of EPDs” snapshot of North American construction product EPD GWP data; and
• a set of CLF baseline GWP values or “CLF Baselines” that represent an estimate of industry-average GHG emissions for construction materials manufactured in North America. Their primary uses are:
  • a basis of comparison; a reference point against which individual products can be evaluated; and
  • default GWP intensity values for project- or assembly-scale modeling.