currently have vinyl tile glued to concrete on grade. Want to install bamboo floor / engineered wood. Can we go on top of existing vinyl?
Possibly. The vinyl tile must be well installed (not coming loose or bubbling or open seams, etc.). If the vinyl tile is a no wax or smooth surface, it may still need to be prepped with a palm sander and 80 grit just enough to give it some tooth. And finally, make certain to contact both manufacturers' reps or technical services to make certain that the new glue is compatible with both the vinyl and the bamboo... and to make certain that this endeavor will not void your warranty. Good luck.
If the vinyl tile thats down now is well bonded, not coming up at all and the floor is flat.There are ways to do it. Most certainly you can do a floating floor system. Glue direct can also be down if certain precautions are done ,like roughing up the vinyl,cleaning it well and the use or the proper glue to bond to vinyl. If the vinyl is loose at all , then the flooring must come up. Any questions you can e mail me through my avatar. GL