If the surface decking boards are also pressure-treated with ACQ, CA-B, and ACZA, would the fasteners attaching them to the joist corrode?
Yes. Fasteners made out of stainless steel or of a thicker galvanizing layer should be used to attach pressure-treated (PT) surface boards to PT joists. However, stainless steel and galvanized metal should not come in direct contact with each other; for instance, stainless steel fasteners should NOT be used with galvanized connectors/joist hangers. Otherwise, corrosion will be accelerated further.
Related Questions
- If the surface decking boards are also pressure-treated with ACQ, CA-B, and ACZA, would the fasteners attaching them to the joist corrode?
- What type of fasteners (and other metal products) should be used with CA-B pressure-treated wood products?
- How much more corrosive are the new pressure-treated wood preservatives (i.e. ACQ, CA-B, and ACZA)?
