Will pressure-treatment with waterborne chemicals after bonding cause delamination?
Pressure treatment of properly manufactured structural glued laminated timber members will not cause delamination. Delamination refers to adhesive failure leading to separation of bond lines. Adhesives used in modern glulam products must meet stringent standards for moisture resistance and durability. Additionally, adhesive bonds in glulam must also pass rigorous daily testing for strength and durability. Consequently, delamination is very rare in structural glued laminated timber whether it is pressure-treated after bonding or not. Checks can occur along bond lines due to stress concentrations between laminations and are often mistaken for delamination. The presence of wood fiber separations or torn wood fibers at the bond line is the key distinguishing characteristic of checks (AITC Technical Note 11).
Related Questions
- Silent Spring Institute studies breast cancer. Has Silent Spring Institute research found that chemicals in drinking water can cause breast cancer?
- Are environmental levels of man-made pesticides and other synthetic chemicals an important cause of cancer?
- Will pressure-treatment with waterborne chemicals after bonding cause delamination?
