In the past, wood has required more maintenance than vinyl or aluminum. In fact, vinyl is virtually maintenance free. However, for homeowners that want real wood with less maintenance, The Window Design Group has spearheaded a number of innovations. Windows in Wood Clad feature Cladding which is an aluminum “cap” that covers the exterior of some wood window and comes in an array of different colors. It never needs painting, and the interior side can remain un-clad to display the natural beauty of wood. We estimate that nearly 90 percent of our wood windows are sold with cladding.