There has been some question regarding the spelling of the word "molding". Why does it sometimes appear without the "u" in the word? Can this be explained rationally? Why, yes it can. Here is a very short history:

The idea of mouldings goes back much farther, and, as stated in Wikipedia "At their simplest, moldings are a means of applying light and dark shaded stripes to a structure or object without having to change the material or apply pigment. The contrast of dark and light areas gives definition to the object ... Together, these basic elements and their variants form a decorative vocabulary which can be assembled and rearranged in endless combinations. This vocabulary is at the core of both Classical architecture and Gothic architecture."
As you'll notice, I use the word "moulding". This version of the word is older and it originates in England, Australia and Canada and therefore will sometimes still be used in the northern United States, or, by companies who wish to preserve their "Old World" heritage in their company name.
Wood molding is actually the proper spelling for referring to the product in the United States and how we present the term on our site.