Often asked: What Kind Of Plywood Goes Under The Toilet?

Should I use plywood or OSB for bathroom subfloor?

This is why not many people prefer OSB as their primary Subflooring material. To prevent tiling from cracking, the installation requires a flat and solid surface and for that, Plywood remains better than OSB.

What thickness plywood should I use for bathroom flooring?

Consider what the top layer of the bathroom flooring will be since some types of plywood are better suited for different flooring. For hardwood, tongue-and-groove CDX plywood rated AC with a 1/2- to 3/4-inch thickness is best. Specifically for subflooring, tongue-and-groove plywood is strong and will reduce squeaks.

How thick should subfloor be in bathroom?

Make Sure Your Subfloor is Structurally Stable 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 plywood?

Apply a bead of the silicone caulk around the entire perimeter of the subfloor. Place the angled part of the nozzle flat against the crevice between the subfloor and the bottom of the wall and squeeze the trigger slowly. Move the caulk gun evenly along the crevice to apply a bead of caulk.

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Is it OK to use treated plywood for subfloor?

Under the IRC this 19% or less moisture content lumber is called kiln-dried-after-treatment lumber and is perfectly acceptable to be used in structural sheathing, subflooring, or framing.

How do I know if my subfloor needs to be replaced?

9 Common Signs of Subfloor Damage

  1. Your floors are uneven or sunken in parts.
  2. Your floorboards squeak – loudly.
  3. The room smells musty.
  4. Your floors shift or bounce when you walk on them.
  5. Your toilet is rocking or loose.
  6. Your tile flooring has cracked.
  7. Your hardwood floor is cupping.
  8. Your linoleum floor is bubbling up.

Is 12mm plywood OK for flooring?

12mm Plywood The cross-graining technique used in our 12mm ply improves strength, stability and prevents warping, making it excellent for bath panelling, wall lining floors and roofs.

Is it better to nail or screw subfloor?

Using code-approved screws rather than nails is the best option for avoiding movement. If using nails for subfloor installation, stick with ring-shank nails; smooth nails may withdraw easier, leading to squeaks.

What type of plywood is used for sub flooring?

Standard plywood can be used for subfloors, but a better material is 3/4-inch tongue-and-groove plywood subflooring. The tongue-and-groove edges interlock to resist movement along the panel edges and create an overall stiffer floor.

What should I use for subfloor in bathroom?

Plywood as a Subfloor Material Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Plywood is made by gluing alternating layers of wood veneer. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity.

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Is it necessary to waterproof bathroom floor?

Bathrooms are the main wet area in the house. Therefore, you need to waterproof the area so that water does not get into the substructure of the house and cause major structural damage. It involves setting up a waterproof barrier around the floor and walls of the bathroom, including the shower.

What size plywood is used for subfloor?

What Determines Subfloor Thickness. The minimum thickness of plywood for subflooring is about 5/8 inch. Since it does not hold fasteners as well as plywood, OSB must be a little thicker, or at least 23/32 inch.

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