4 Everdeck 10 Year Guarantee Composite decking tiles can be installed by yourself with almost no experience. The unique plastic interlocking base makes installation extremely easy. The tiles are designed like a set of puzzles that snap together with little force required. 4 Everdeck DIY decking tiles are primarily used for laying on top of concrete or existing solid surfaces such as Balcony Flooring, roof terraces or outdoor showers. The plastic base keeps tiles above ground allowing for water to drain. What makes 4 Everdeck DIY tiles better then traditional wooden tiles is that they never rot or need maintance ensuring they last far longer, and with a 10 year guarantee you have complete peace of mind.