Laminate is installed as a “floating floor”, a minimum of ¼” expansion space must be left around the entire perimeter of the room and at all vertical obstructions including all supply and drain lines and at the tub. Some manufactures require gluing the floor together in this type of installation.
Level the floor and use underlayment as with any installation. You may want to consider an underlayment that has antimicrobial properties or prevents bacteria.
When the floor is installed, fill all expansion spaces with 100% mildew resistant silicone sealant including around the toilet flange and all pipes (see Photos 4 & 5). Do not use latex caulk. It will dry hard and restrict movement. The silicone seal helps prevent water damage below the floor.
All expansion spaces in bathrooms and laundry rooms must be filled with silicone including doorways.
The expansion space around the perimeter must be sealed prior to installing the trim (see Photo 6).
When installing in an adjoining room or hall, a t-molding must be used in the doorway between the rooms and the expansion space filled with silicone.
Do not install laminate in rooms with a floor drain or sump pump.