Generally, laminate flooring is not recommended for wet areas. My suggestion is to strip the flooring to the bare concrete. For my DR, I used an epoxy floor surface kit. It has been great, impervious to the water and chemicals of the DR. And a big plus easy cleanup & maintenance.
Buy an epoxy garage flooring kit at your favorite home improvement center and apply according to the instructions. Then get the square garage flooring pads, approximately 4 sq feet each with interlocking "jigsaw" dovetails for the typical standing areas, (in front of enlargers & sink). They pads are thick, comfy and so far, appear to be pretty impervious to the DR environment. The inlerlock together and do not create a trip/slip hazard.
The pads are easily lifted for cleaning and the semi annual trip outdoors for the hosing off...and best of all...cheap! Occasional moppings in between keep them from looking grungy. Mine have been in the DR for nearly years and are still perfectly functional and look near new after the hose downs! And they all but eliminate the stress fatigue of the hard, concrete floor.
Cheers,
Geary