What is important when using aluminum fasteners with treated wood?

Using aluminum fasteners with treated wood requires careful consideration due to the potential for corrosion. Treated wood is often formulated with chemicals, such as copper compounds, which can react negatively with aluminum. This reaction can lead to corrosion of the aluminum fasteners over time, resulting in reduced structural integrity.

The use of only proprietary anti-corrosion coatings is crucial because these specially designed coatings protect the aluminum fasteners from the corrosive effects of the chemicals in treated wood. By using fasteners specifically rated for use with treated wood, you ensure long-term durability and stability of your roofing structure. Proprietary coatings are developed based on industry research and testing to withstand potential chemical interactions, making them a reliable choice for this application.

In contrast, the other choices do not address the specific need for protecting aluminum fasteners from corrosion when used with treated wood. For instance, stating that no coatings are necessary or that a wide variety of fasteners are acceptable can lead to premature failure due to corrosion risks. Similarly, applying wood glue does not contribute to mitigating the corrosion issue and is unrelated to the interaction between aluminum and treated wood.