How do you level a bathtub?

1. Set the tub in place and place a level on one of the long sides. Have a helper lift the tub while you place shims under the legs or where the base touches the floor. Use metal or hardwood shims; softwood or plastic shims can compress over time with the weight the water and bathers.

Does bathtub need ledger?

There’s no point to a ledger if you have a typical framed wall and can simply nail the flange to the studs every 16″. The only tubs I’ve ever installed using a ledger are large spa-type tubs, and those are usually set into a full deck. Typical shower tubs simply get fastened to the wall framing.

How do you level an acrylic tub?

Quote from the video:
Quote from Youtube video: We're also using a torpedo level in the corners here to make sure that that edge isn't compressed downward whenever we set the screws into the in through the tub and into the stud.

How do you install a tub ledger?

Quote from the video:
Quote from Youtube video: Use the provided extra tub rim screw to attach wedges to the floor. And trim excess determine. The recommended ledger height from the tub instructions. And add 1/4 inch at each corner wall stud.

How do you support under a bathtub?

Quote from the video:
Quote from Youtube video: In i'm sliding these in from the back. So this is 16 inch on center so i can get a 14 and a half inch pieces in there. So that's just something you're going to have to figure out on your own.

Do you have to mortar under tub?

When you’re installing a heavy bathtub or one that you expect to support an unusual amount of weight, it’s important to lay mortar underneath it. It’s easy to adjust the level of the tub when the mortar is fresh.

How do you fix a bathtub that is not level?


  1. Start by recruiting a friend to help you un-attach your bathtub from the wall, floor, or both.
  2. Next, check to see if it’s level by using your large level.
  3. If it’s not, slide wood or metal shims underneath the tub.
  4. Re-check to see if it’s level and add more shims if necessary.

How do you rough frame a bathtub?

Quote from the video:
Quote from Youtube video: And make sure that you allow at least a minimum of a quarter of an inch. For the bathtub installation. Make it a quarter of an inch larger. If anything don't make it a quarter of an inch smaller.

What is a tub flange?

The flange is meant to collect moisture, which gravity draws down the wall, and prevent it from ending up in the wall cavity. A properly built enclosure will have a moisture barrier or roofing felt or plastic sheeting drape over this flange before the wall material is installed.

Do I need to reinforce my floor for a bathtub?

Traditionally bathroom floors are built to withstand the pressure of an average bathtub (full), but in some cases the floor can be weak, or if you are looking at getting a larger tub, you might need to look into reinforcing the flooring.

Do you put cement board under bathtub?

The best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area. Apply it to the wall with the bottom edge about 1/4 in. above the lip of the tub. Then apply a generous amount of thin-set to the bottom bathtub tile and position it 1/8 in.

Does subfloor go under bathtub?

Bathroom floors are notorious for suffering water damage and the area under the bathtub is no exception. Flooring repairs can be intimidating, but the subfloor under the tub generally consists of plywood secured over floor joists and is fairly simple to replace – once you get access to it.

How do you prepare a floor for a bathtub?

Quote from the video:
Quote from Youtube video: And then out on this edge of it there's a sled or a bit of a skid there some feet that you that we can shim up on the floor. To get everything level so we don't need any support back here.

How do you reinforce a floor under a bathtub?

Addition of Joists

Upgrading the surface of a subfloor is not the only possible solution for reinforcing a floor to support a cast iron tub. A subfloor may also be reinforced from beneath the floorboards. Add extra support to a floor beneath the floorboards by adding additional joists to the floor.

Can you use spray foam under tub?

Yes, expanding spray foam can be used under a bathtub. It can reduce coldness and flex in an existing install, but an improper application can result in additional problems. It’s important to understand that the tried-and-true best practice for preventing flex in a newly installed bathtub is with a mortar slab.

How do I stop my bath from flexing?

Quote from the video:
Quote from Youtube video: Now at this stage what most people would do is to tile down to the edge of the bath. And then run a bead of silicone. Along there to stop any water ingress.

How do you mortar under a bathtub?

Quote from the video:
Quote from Youtube video: We know what it needs to be set level to set it level we're gonna use this sand mix to pack under the tub to make sure that the tub is fully supported. You can see where our drain riser is.