How to Regrout Tile on a Fiberglass Hot Tub
- 1). Remove loose items from the room or surrounding area. Removing the old grout will produce a lot of dust, and removing objects before you start saves you from cleaning them later.
- 2). Cover the wall and remaining items in the room with plastic sheets to simplify cleanup. Cover all the hot tub plumbing with masking tape to keep dust out of the drain and hot tub jets.
- 3). Break up and remove the old grout. Fit a rotary cutter with a masonry-cutting bit. Turn on the rotary cutter and press the bit into the grout, being careful not to touch the surrounding tiles. Wear safety goggles and a breathing mask while you work. Remove all the grout between the tiles, down to the thinset below, which is a different color than the grout. Don't break up the thinset. As you work, have your helper stand by with a vacuum hose, vacuuming the dust as the rotary cutter kicks it up.
- 4). Clean away all the old grout and dust. Vacuum up as much dust and debris as you can and then wipe the tiles with a wet sponge. If you find any remaining grout between the tiles, remove it with the rotary cutter. Any remaining dust or grout will keep the new grout from bonding to the tiles, so clean the area diligently.
- 5). Spread the new grout over the tiles with a grout float. Push the grout down in between the tiles. Remove excess grout from the surface of your tiles by scraping with the edge of the grout float. Wipe any remaining grout residue from the tops of the tiles before the grout dries.
- 6). Joint the grout when it has begun to dry. Run the corner of a damp sponge along the grout lines, creating and even depth and consistent appearance.