Honduran mahogany wood is typically used to craft exterior shutters due to its high strength and water resistance. Its ability to retain its shape under fluctuating temperatures and moisture levels makes mahogany exterior shutters ideal for homes in rainy, windy and humid climates. On the other hand, constant exposure to sunlight can cause mahogany shutters to fade over time. In addition to its high density, mahogany features a straight and open grain that makes it an attractive wood for paints and clear finishes.
Western red cedar is the cedar type preferred by homebuilders due to its longevity and durability. Cedar wood has a fine, rich grain that contains natural tannins. As with mahogany wood, exterior shutters made with cedar are naturally resistant to moisture and insects and less prone to decay. This wood species also expands and contracts less than other softwoods such as pine and spruce. Another benefit of cedar is that it lies flat and provides a firm base for paints and other finishes. However, the natural tannins that occasionally bleed to the surface stain if they come into contact with metals or iron. If cedar shutters are not treated, they can also fade and take on a grayish cast with age.
Cypress exterior shutters are another durable option for homeowners living in areas where the weather is extreme. Despite its light weight, the wood is resistant to splitting, cracking and splintering. The oil present in cypress wood offers protection against bugs and fungus. Exterior shutters made with cypress wood also adhere well to paints, sealants and stains. Cedar wood shutters are stronger than western red cedar but will be more expensive if built in areas outside the southeastern United States. Though easy to cut and nail, cedar wood can twist and warp if not dried thoroughly.
Wood composite shutters are becoming more common due to the lumber's high strength and durability compared to pure wood. Although not naturally grown, wood composite comprises recycled wood and plastic waste products. This gives composite wood shutters similar strength and behavioral qualities as cypress, cedar and mahogany woods. The wood is virtually immune to rot and insects, and it doesn't splinter. Although low-cost options are available on the market, composite lumber can be expensive due to its longevity. It also fades and dulls over time and lacks the appearance of true wood shutters.