Lock Type Technology
- Tongue-and-groove Engineered wood
One side and one end of the plank have a groove, the other side and end have a tongue (protruding wood along an edge’s center). The tongue and groove fit snugly together, thus joining or aligning the planks, and are not visible once joined. Tongue-and-groove flooring can be installed by glue-down (both engineered and solid), floating (mostly engineered only), or nail-down (mostly solid wood).
- “Click” or Woodlock systems
There are a number of patented “click” systems that now exist. These click systems are either “unilin” or “fiboloc” A “click” floor is similar to tongue-and-groove, but instead of fitting directly into the groove, the board must be angled or “tapped” in to make the curved or barbed tongue fit into the modified groove.
No adhesive is used when installing a “click” floor, making board replacement easier. This system not only exists for engineered wood floors but also for a small number of solid floors and is designed to be used for floating installations like Bamboo. It is beneficial for the Do-It-Yourself market.

