Since you are dealing with a floating floor you need something to hold the edge of the flooring down.
How to float wood floor tongue groove.
Installing a threshold will cover up the raw edge of the tongue and groove flooring.
Where the flooring meets tile hardwood or laminate you will need to use a t molding.
Here are the basics of how to get started laying floating tongue and groove flooring.
Although tongue and groove solid hardwood flooring does fit together it must still be nailed to a subfloor.
Engineered tongue and groove planks however snap together to create a floating.
In a typical hardwood flooring installation the tongues of the boards must all face in the same direction.
How to reverse a tongue groove wood floor.
After nailing the tongues of one course.
Using a floating installation will also allow you to easily install the job yourself.