Since your floor is a floating floor it needs ample room to expand and contract.
Should caulk along baseboard along the floor.
When setting the tape hold the roll flat up against the baseboard as a guide in positioning the tape first photo above.
You may wipe the excess caulk on your finger with a wet rag.
Use good quality tape 3m 1 blue painter s tape.
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The caulk is used on the top of the baseboards to give an exquisite look.
This will protect the flooring from the excess caulk that will inevitably squeeze out after application.
After you are content with the caulking job and while the caulk is still wet.
If the gap between the floor and the quarter round is eliminated the caulk will split from the floor moving and there is a slight albeit very slight chance that the floor could buckle in some places if the room for expansion is not there.
My tips for caulking bottom of baseboards.
There are two significant reasons for caulking baseboards.
Remove the masking tape along the area caulked.
If applying to caulk to the bottoms of the baseboards run painter s tape along the flooring parallel to the baseboards about 1 8 inch away.
The caulk is applied on the top of the baseboards where the baseboard leaves a gap or the wall creates a gap.
Here is how to caulk trim and baseboards.
The object is to set the tape at the exact vertical position where the baseboard would make contact with the floor.
Caulk only between the quater round and the baseboard.
Sealing the spaces between the baseboard and the floor or.
Press it just hard enough to smoothen it into the line.
Caulking baseboards entails applying a sealant along the edges of the floor to seal the gaps between the floor and baseboard or the spaces wall and the baseboard.
With time gaps start developing between the floor and baseboards and caulking keep them in control.