What type of mortar do you use to set a bathtub?

Both regular thinset mortar and floor leveling compound are suitable. A series of strategically placed piles is easier to control than a full bed, and it provides comparable support for the tub. Level the subfloor in the alcove where you intend to install the bathtub, and cut the hole for the drain.

How thick should mortar bed be for tub?

Because the mortar bed needs to be 2 to 4 inches thick, it’s a good idea to install these supports about an inch higher than you would if the tub were sitting on the floor.

Does a bathtub need a mortar bed?

Whether you are installing a regular acrylic bathtub that doubles as a shower unit or a larger two-person Jacuzzi, most bathtubs require a mortar base for the tub to rest on. Without this support, the plastic of the tub would eventually break and crack.

What is the difference between Type N and Type S mortar?

Type N mortar is a general-purpose mortar that provides good workability and serviceability. It is commonly used in interior walls, above-grade exterior walls under normal loading conditions, and in veneers. Type S mortar is used in structural load-bearing applications and for exterior applications at or below grade.

Should you put cement board under bathtub?

There is no reason not to do it, but also no overpowering reason to do it, since the water is not going to leak through the tub or shower base.

How long does it take for tub mortar to dry?

Well, that isn’t what I’d use, but after a day, it should be cured enough. All cement products reach their stated strength in 28-days, but reach probably 70% in the first day or so.

Why does my bath creak when I stand in it?

Tub Surround If the surround and tub are not connected properly, you may hear a squeaking sound, due to the two parts rubbing together when you stand in your tub. Check the perimeter of your tub and shower surround to make sure the two are snapped in properly.

How many bags of mortar do you need for a bathtub?

Usually you need one 55 lb of mortar for one tub. But as you’ll see in our video we had to use two bags, but it’s not like the Mud Bed Mix is breaking the bank. Mix the mortar so that it can support the tub. It should not be runny but rather stand up on it’s own.

What kind of mortar to use under the bathtub?

The mortar provides a stable base for the tub to rest on when the tub is full, so the casing of the tub doesn’t have to support all of the weight and crack. A variety of different types can be used, as long as it hardens to provide a base. Bathtubs are best set on top of mortar.

Is it OK to put mortar under a CI tub?

Many older tubs were made of cast iron (and many still are). A CI tub is strong enough to not worry about flex, but even one of those can benefit from something under it if the floor is not both flat and level. No tub is designed to be completely supported by hanging from the rim.

How to best place mortar before setting base?

To follow up Terry’s point about how to best place mortar before setting the base, here are some thoughts. If you have ever set tile, you know that you use a notched trowel. The reason for the notches is to allow you to press the tiles down.

What kind of flooring to use under a bathtub?

Level the subfloor in the alcove where you intend to install the bathtub, and cut the hole for the drain. Coat the subfloor with two coats of floor primer, and let the primer dry. This seals the plywood and prevents moisture problems from developing underneath the bathtub.