If you are fitting a non click engineered floor or directly gluing a wooden floor/lvt to your sub floor then you will need the right glue. There are different types available depending on your needs. A tongue and groove adhesive is used for floating a non click floor while you will need a more robust polymer adhesive for directly gluing your floor to the ground. A polymer adhesive will allow your floor to move when needed while maintaining a solid underfoot feel. For an lvt there is a specific lvt adhesive needed.