How to install corrugated metal siding, whether in a vertical or horizontal manner, is up to the style preference of the homeowner. While that may be true, there is one thing to keep in mind when making this decision. Vertical corrugated metal siding will be easier to maintain over time as water and dirt aren’t able to collect between the grooves. Horizontal corrugated metal siding on the other hand leaves little shelves for unwanted debris to gather.