Interior window trim is often more decorative so wood is a viable choice. Window trim will work as an important barrier to help keep outside air out of the home, and inside air in, says DiMartino.

Home & Garden Install a sill pan for leaking windows Published: Oct. 17, 2008, 12:31 p.m.

And as it turns out, the perfect window treatment idea isn't a one-and-done approach. In fact, layering your window treatments is an interior designer's best-kept secret.

Of course, if you live in an apartment high off the street below, you have to wonder what exactly these nook windows are made of. Leaning your full weight onto a window pane is a whole different ...