It is Weyerhaeuser's policy to ensure we and our suppliers comply with the law and do not cause or encourage destruction of forest areas at risk of loss from unsustainable forest management practices.


We operate in conformance with the Sustainable Forestry Initiative® (SFI®) Fiber Sourcing and Chain-of-Custody and PEFC™ Chain-of-Custody standards when procuring logs, chips and other wood-based raw material.

We will not knowingly purchase wood, wood fiber, or products for distribution that originate from illegal logging as defined in the Lacey Act.

We will not harvest or buy wood from old-growth forests1. The only exceptions are forests harvested under provision from state, federal, and/or provincial government agencies; with active support from environmental groups due to a net environmental benefit; with support from tribes and indigenous peoples; or support for public land managers’ efforts to improve forest health.

We will not purchase wood, wood fiber, or products for distribution from major tropical wilderness areas or biodiversity hotspots2 unless the sources have been independently certified or verified as having originated from well managed systems.

We support the independent certification of sustainable forest management and the principles and objectives of globally accepted forest certification standards.


We will participate in and support the activities of the SFI State Implementation Committees to promote certified and professional logger training.

  • We require that the implementation of Best Management Practices (BMPs) to protect water quality be included in contracts for the purchase of raw materials from landowners and forest operators who supply us with raw material.
  • We have programs in place to ensure fiber sourcing activities do not compromise adherence to the principles of sustainable forestry, including managing harvesting activities and log inventories during adverse weather conditions.
  • We measure the success of our efforts by evaluating BMPs in an overall wood basket, when such information is available, and use that information to set goals for continual improvement.3
  • Employees are expected to participate in training relevant to their functions.


Employees are expected to participate in environmental training relevant to their functions. 


We define old-growth forests as stands that are 1) greater than or equal to fifty (50) acres in size; and 2) have greater than or equal to 50% of the dominant, native tree species (appropriate for site conditions); and 3) are greater than or equal to 200 years of age west of the crest of the Cascade Mountains or 250 years of age east of the crest. This definition primarily focuses on forests found in the western part of the United States and Canada, where residual old-growth forests are more likely to be found. In other parts of the US and Canada, old-growth forests will be defined on a project basis to match location-specific forest types.

Biodiversity hotspots and major tropical wilderness areas are areas outside North America defined and mapped by the Critical Ecosystem Partnership Fund in collaboration with Conservation International. We support the development of, and use information produced by, environmental nongovernmental organizations, the Food and Agriculture Organization of the United Nations, national governments, and scientific organizations to understand the risks to different areas of the world, and to help determine forest areas to include in these guidelines.

To evaluate BMPs, we give preference to publicly available data from state or regional monitoring programs. Absent a reliable state or regional monitoring program, we will use other ways to evaluate the effectiveness of BMP requirements and promotional efforts.

Related Resources  

Related Guidelines

We encourage the use of certified logging professionals, where available, and qualified resource and logging professionals by those who supply raw material to our manufacturing facilities.

We promote the American Tree Farm System as an effective tool for expanding and certifying sustainable forest management with family forest landowners in the United States and our procurement programs have a preference for Tree Farm-certified raw material sourced from these landowners.