The SPIB Mark on treated wood products has long been accepted in the marketplace as a symbol of quality.

This distinctive mark with its angular SPIB letters has signified voluntary producer adherence to the Bureau's standards of quality for over five decades and is widely recognized and accepted by specifiers, users, and code enforcement personnel. Producers in good standing under our Third-Party Quality Audit Program may use the SPIB mark in association with the WWPI CheckMark for products treated according to AWPA Standards or the ICC-ES Global Logo for products treated according to ICC Evaluation Service Reports.