There are not many DIY projects which appear as challenging as decking is, until you stand in the decking materials aisle and realize there’s a lot of factors to consider. Traditionally decking has been divided into two material types, wood and composite. The major difference between the two is the long term cost and maintenance requirements. Composition decking up front costs are generally higher, but require less maintenance. Wood requires more upkeep and can decay over time.
A decaying deck is a bigger problem than many people consider when first constructing a deck. Over time deck boards can split and decay and even begin to molder. Additionally, a deck that is exposed to the elements, like a deck that is outdoors, can become very slippery with algae and moss. Some composite decking materials are designed with a textured surface that helps reduce slippery conditions caused by algae and moss. A deck that decays and molds can also become unsightly and pose an eyesore. Replacing a deck becomes a better financial option as time goes on.
Many problems in construction can be attributed to mistakes made in the substructural details. One of these details is the spacing of joists. If the spacing is too large, long, flexible, and/or poorly supported, boards will rapidly lose their deflection and will start to twist and bow. The spacing of joists is dependent on the type and thickness of the board and therefore will vary. It is always good practice to check the distributor’s specification to determine the appropriate spacing.
The winter months can also affect outdoor board structures. In the UK, outdoor board structures that are either unswept or badly maintained can become extremely slippery. Also, standing water can rot boards quickly. Maintaining your deck in the autumn and winter can help prevent early board rot.
Replacing boards in the spring can be prevented by maintaining your deck in the winter and falling/spilling less leaves on it. While no deck is completely maintenance-free, knowing what you are getting can prevent a lot of post-purchase annoyance.