The recommended glue for floating installation is Tongue and Groove engineered flooring glue. Glue placement is very important. The glue must be placed along the topside of the groove the full length of the grooved side and end.he answer clicker counter to your question is yes you can relay the flooring but it all depends in which way it was laid originally and how successful you are at lifting the floor. I hope this helps is specifically formulated for all types of engineered floating wood and laminate floating floors, even over radiant heat systems. It provides a superior bond at the tongue and groove. Due to its white color, the glue is easy to see for quick cleanup.