How do I determine the thickness of aluminum siding?

To determine the thickness of aluminum siding, you can use a digital caliper or a micrometer, which are precise measuring tools. Place the caliper or micrometer at the edge of the siding, ensuring it's perpendicular to the surface, and take a measurement. Another method is to use a magnetic thickness gauge if the siding is coated, as this tool can measure the thickness of non-magnetic coatings on magnetic metals. Always check the manufacturer's specifications for the siding as well, as they often provide thickness information.