10/3 Corrugated has a depth of ¾” and a sinusoidal profile that exactly matches that of the 13½/3 corrugated sheet. The distinctions between these to profiles can be seen when the cover width and side lap detail are more closely inspected. 10/3 Corrugated has a cover width 2’6”, this narrower sheet is more versatile, as it can be easily curved and when run with the two lips pointing up, provides a corrugated sheet that can be used on a Spaced Roof for additional ventilation .