Product Support

By: Western Wood Products Association  06-Dec-2011
Keywords: Lumber, Technical Information, Detailed Technical Information

Lumber and Mold

Information about mold on lumber is available online in the WWPA section. The section features the Association's popular Mold, Housing and Wood publication, which provides scientific information on mold and building materials, and three Fast Facts: What is Mold?; Preventing and Controlling Mold; and Cleaning Mold. Digital versions of these publications are available for downloading.

Online Technical GuideYou can get detailed technical information on lumber produced by WWPA mills in the Free registration is required. The guide features lumber grade basics, Western species and uses, lumber specifying, environ-mental information, base design values, MSR lumber and lumber properties and spans.International Guide

Lumber buyers from outside the U.S. can use the interactive to find Western lumber products. The guide is available in English, Japanese, Chinese and Mexican Spanish languages. You can also find other foreign language publications in the .

Keywords: Detailed Technical Information, Lumber, Technical Information,

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Other products and services from Western Wood Products Association


Market Services

This price data is the basis for the monthly and Price Indexes, which are used by the U.S. Forest Service and others to adjust the stumpage price paid on timber harvests. Thereport shows lumber production, orders, shipments and inventories for the week, with year-to-date totals and comparisons to the previous year.


Grade Stamps

The Association is approved to provide mill supervisory services under its rules and the rules of the West Coast Lumber Inspection Bureau, the Redwood Inspection Service, the National Lumber Grades Authority for Canadian Lumber and the NGR portion of the Southern Pine Inspection Bureau Rules.


Technical Services

WWPA's Technical Services Division leads the industry in creating and distributing this technical information to professional users worldwide. To use lumber in structural applications, construction professionals need information on the strength capabilities of various lumber grades. Western lumber design values, design criteria, loading data and span tables have been developed through WWPA's wood engineering research.


Quality Assurance

The Association pioneered the quality control procedures used by the lumber industry to make MSR products, and WWPA provides quality control for more finger-jointed lumber operations than any other lumber grading agency in North America. Lumber grading rules are a set of criteria used to determine how various characteristics, such as wane or knots, affect the structural performance of dimension lumber or the aesthetic value of appearance grades.