What should be used for a bathroom subfloor?

Does bathroom need subfloor?

It is important because the subfloor needs to be able to withstand the high moisture levels in a bathroom, and not all materials can handle such a tremendous task. It prevents water from seeping into areas around the sink, toilet, and bathtub, which are more prone to exposure to water.Oct 26, 2015

How thick should subfloor be in bathroom?

The installation guide for 1/4 inch HardieBacker recommends having wood subfloors made of 5/8 inch exterior grade plywood or OSB (oriented strand board) that is 23/32 inches thick.

How do you waterproof a bathroom subfloor?

Caulk any seams where two pieces of plywood are butted together. Dab caulk onto nail or screw heads to seal the potential leak point they provide. Caulk any splits in the wood or any other areas that may provide a point for water to seep under the subfloor.

Does subfloor go under bathtub?

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. The entire tub unit requires removal before subfloor replacement can begin.

image-What should be used for a bathroom subfloor?
image-What should be used for a bathroom subfloor?

What is the best underlayment for a bathroom floor?

Most floor coverings are best installed over a rigid underlayment applied over the subfloor: Plywood: Sheets of 4-by-8-foot A/C grade plywood cut to size are an excellent underlayment.5 days ago


Can I use plywood in a bathroom?

The top layer of the plywood has a coating that naturally repels water and prevents it from penetrating below the surface and attacking the wood below. As such, you can use it in construction work both outdoors and indoors, in kitchens and bathrooms.Jul 27, 2021


What is underneath a subfloor?

Underlayment is an optional layer that is less about structure than about providing a smooth, consistent surface for the floor covering.Sep 21, 2021


What plywood should I use for subfloor?

Plywood Subflooring

Plywood has been a standard subfloor material since the 1950s and remains the preferred subflooring for many builders. Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring.
Jan 4, 2021


Is it better to use OSB or plywood for subfloor?

The National Tile Contractors Association and the Resilient Floor Covering Institute both recommend plywood for subflooring and underlayment, because it doesn't have the risk of swollen edges that OSB does. Plywood also has a slight advantage in stiffness, which means that subflooring panels need not be quite as thick.Oct 3, 2013


Can you use plywood sheathing for subfloor?

Standard plywood can be used for subfloors, but it is more common to use tongue-and-groove sheets that interlock along the edges. The recommended thickness of the plywood subfloor is governed by the spacing of the joists. ... The type of OSB used for subfloors generally is made with tongue-and-groove edges (T & G).Sep 14, 2021


Is tongue and groove necessary for subfloor?

For subflooring, you use tongue and groove plywood. The tongue and groove are only along the 8 foot edges. On the four foot edges, your seams will fall on joist tops, so no need for tongue and groove.Oct 13, 2011


How do you waterproof a wooden bathroom floor?

That said, a wood floor can be sealed for use in a bathroom: hard wax oil and lacquer are the best options. An additional treatment can be applied after the floor has been installed to stop water penetration between joints. After water damage, floors can be repaired and individual boards can often be replaced.Feb 2, 2020


Should flooring be installed under bathtub?

With placing the bathtub before the flooring and wall, you can better position the bathtub for protection and aesthetics. Without having to worry about damaging the flooring and wall, you can simply place the bathtub where you want and place the flooring and wall after to limit gaps between the two.Apr 25, 2021


What is a sunken bathtub?

What is a Sunken Bathtub? A sunken tub is a bathtub design that eliminates the traditional structure of the bathtub above the floor line and essentially becomes part of the floor itself. These bathtubs are built into the bathroom floor and the basin of the tub generally sits below the floor line.Jul 9, 2019


What do you put under a tub?

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.Dec 19, 2018


What is best for bathroom sub-floor?

  • 3/4" t&g plywood or advantec would be a good choice for the subfloor. Install blocking between the floor joists at the cut edges where there is no t&g to fully support the subfloor.


How much does it cost to install a subfloor?

  • For a basic project in zip code 47474 with 120 square feet, the cost to Install a Subfloor starts at $8.40 - $16.31 per square foot*. Actual costs will depend on job size, conditions, size options.


How do you replace a subfloor?

  • Full Answer. Pry up the floorboards with a crowbar and cut out the rotten subflooring with a circular saw. If the joists are still sturdy, replace the rotten subflooring with new plywood cut to fit the space in question and then nail down the new wood. It is possible to nail new plywood into place onto rotten subflooring,...


What is the Best Flooring to use for a bathroom?

  • Slate is considered a good choice for stone bathroom floors as it has a rougher texture that helps prevent slipping and it's less expensive that most kinds of stone. Ceramic bathroom flooring is excellent for bathrooms if it's unglazed, as the glazed type may get slippery.


What is the subfloor of a bathroom made of?What is the subfloor of a bathroom made of?

Throughout the house, the subfloor is usually a single layer of plywood; however, in bathrooms, the subfloor often consists of a plywood layer and an underlayment of concrete backer board. Floors in bathrooms regularly see a lot of moisture and must withstand the high levels of humidity over a long period.


Do you need to waterproof a bathroom subfloor?Do you need to waterproof a bathroom subfloor?

Often the subfloor consists of plywood that is nailed or screwed to the construction floor. Before finish flooring is installed on top of a plywood subfloor, you must waterproof the subfloor, especially in a bathroom. If you do not waterproof the subfloor, moisture can make its way under the subfloor and cause mold growth or other damage.


How to repair a rotted bathroom subfloor?How to repair a rotted bathroom subfloor?

How to Repair a Rotted Bathroom Subfloor. 1. Take out any cabinets sitting on top of the damaged flooring. Pull the toilet if the floor around it is damaged. 2. Remove the baseboard from around the room with a pry bar, and take off the floor covering. If the damage is localized to a small area, you ...


Can you put a built up shower pan on subfloor?Can you put a built up shower pan on subfloor?

Depending on the subfloor material, you will need to ensure it is sturdy enough to support the weight of a built up shower pan. In order to add support and reinforce the subfloor structure, you can add a secondary layer that the built up shower pan will sit on top of. This secondary layer can be added on top of the running boards or concrete slab.

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