Wood is a popular choice for window shutters especially exterior shutters. Apart from giving a warm look to the building wood is considered safe, pliable and more durable as metal often is prone to wear and tear due to rusting. This is particularly true of building close to the ocean. The high moisture content rusts the best of materials. Wood requires a paint coating for it to remain moisture free, the only thing to worry about. Apart from that it would not need a lot of maintenance. However due to non availability and high price of real wood it is being replaced by MDF or laminate for window shutters these days. Dont worry, cheap and best window shutters are just one click away, just order from timbershades.com.au.