There are two main types of installation.
Floating – A floating installation is where the boards of the floor are fixed to each other, but not down to the subfloor, hence its title. This is an easier, more efficient method of fitting that has its benefits i.e easy access to the subfloor, more room for movement with changes in the climate of the area/room and easy removal for a floor that is likely to be changed in the near future.
Fixed – A fixed installation is where the boards are not only fixed to each other (optional) but fixed to the subfloor. The majority of the time this is the more desired method of installation. Ensuring the relevant subfloor is correctly prepared the floor can be fixed by either secret nails/screws or a suitable flooring adhesive (usually an MS Polymer to give flexibility of movement).