Multi-Wide Units result when you order two or more sashes in a single unit or frame. They're joined at the factory with mullions separating the sashes. Wood Windows are made of solid wood or wood products. They can usually be ordered with standard brick mold trim, custom trim if you need to match existing trim, or no exterior trim at all. They can also be ordered with a coat of primer, finish, or no finish at all.
Painting is the main drawback for solid wood windows.
However, there are less color options than with wood finishes. The more durable cladding consists of extruded aluminum as opposed to rolled aluminum. Also, thicker aluminum is more durable. Vinyl Cladding is another popular low-maintenance cladding, and it can also be applied over other materials, like wood or wood products. As with aluminum cladding, the thicker the vinyl the more durable it will be.