How to Build a Removable Panel for a Whirlpool Bathtub

Determine where the plumbing hookups and motor will be located. When framing the deck with 2-by-4s, leave a minimum space of 12-by-12 inches between the supports at the point where the hookups are. The access panel will be located in that space. The access panel can be bigger, but it must be at least 12-by-12.

Measure the distance from the top of the tub deck to the floor at the access panel point. If it is 18 inches and the access panel hole is 12 inches in width, you need a cover panel that is 18-by-12 inches. Cut the cover panel out of a sheet of 3/4-inch plywood with a circular saw.

Install the whirlpool tub in the deck surround, according to the manufacturer’s instructions. Place fiberglass insulation in between the deck’s frame supports; however, do not place any in the access panel hole. Cover the tub deck in cement board, except for the access panel hole.

Mix up a batch of thin set mortar per the manufacturer's directions. Tile the cement board on the tub deck. Spread the mortar onto the plywood cover for the access panel then tile it. Allow the tile and mortar to fully cure and set overnight.

Place the access panel cover over the access hole. Caulk the seams between the rest of the tub deck tile and the bathroom floor but not the seam between the tile on the access panel and the floor. To access the whirlpool bathtub’s connections, just pull the access panel away from the rest of the tub deck.