Which type of fastener is suitable for wood treated with chromated copper arsenate?

Choosing the correct type of fastener for wood treated with chromated copper arsenate (CCA) is crucial due to the chemical properties of the treatment. CCA is an industry-standard wood preservative that helps protect wood from decay and insect damage, but it also has corrosive properties that can affect certain metals over time.

Using a lumber manufacturer approved fastener ensures compatibility with CCA-treated wood. These fasteners are specifically designed to resist the corrosive effects of the chemicals in the CCA treatment, thus enhancing the durability and integrity of the structure being built. Manufacturer approval typically indicates that the fastener has undergone testing for effectiveness and longevity in conjunction with CCA-treated materials.

While galvanized steel fasteners can offer some resistance to corrosion, they may not be sufficient for long-term use with CCA-treated wood, as the protective coating can wear off over time, exposing the steel to corrosive elements. General purpose fasteners are not specifically designed for use with treated wood and might degrade more quickly in the presence of such preservatives. Aluminum fasteners can be too soft and may not provide the necessary strength, while also being susceptible to corrosion when in contact with CCA-treated wood.

Using a lumber manufacturer approved fastener provides assurance in project integrity and longevity