Some types of exterior molding include solid wood, hardboard, finger-jointed, fiber cement and cellular PVC. The rise in cost and lack of quality hardwoods have caused builders to become more receptive to alternative types of exterior molding.
While solid wood is usually a builder's first choice for exterior molding, high-quality hardwood has become more expensive and harder to find. Solid wood is often used in highly visible trim such as porch columns that require special mitred cuts. PVC and urethane moldings are used due to their longevity and their low maintenance cost. Hardboard is the leading alternative to solid wood, as it is uniform in consistency and holds paint well.