Is CDX plywood good for subfloor?

OSB and CDX subfloors come in tongue and groove. It’s ideal for subflooring, because it prevents the edges of the plywood from moving and squeaking after insulation. Construction adhesive is used to better seal the tongue-and-groove joint.

What kind of plywood do you use for subflooring?

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 is CDX plywood used for?

CDX Plywood is used primarily by contractors to build exterior walls and roofs. CDX plywood has one side veneer grade “C” and one side veneer grade “D”. The two are bonded together with glue which can withstand a little moisture. The APA would recognize CDX Grade Plywood as C-D Exposure 1 plywood.

What is the best wood for subfloor?

Plywood
Plywood is considered the most popular material used for subflooring, it has been used since the 1950s and remains one of the top choices for contractors. Standard plywood works perfectly fine as a subflooring material, but the best option is ¾” tongue-and-groove plywood subflooring.

Can sheathing plywood be used for subfloor?

Like Sturd-I-Floor, Rated Sheathing may be plywood or OSB. When used as a subfloor, Rated Sheathing typically requires installation of an additional layer of underlayment on top of it before finish flooring can be applied. The underlayment requirements vary depending on the finish flooring.

What size plywood is best for subfloor?

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. There are several factors that determine what subfloor thickness is optimal for added benefits like insulation.

What goes over subfloor?

Underlayment: Some types of flooring can be installed directly on top of the subfloor, such as vinyl flooring. Other types need a middle layer, called underlayment, such as laminate,carpet and tile.

How thick should subfloor be for hardwood floors?

3/4″
A wood subfloor should be OSB or plywood of 3/4″ or thicker for a hardwood floor installation. Particle board and chipboard are unacceptable for solid hardwood installations, but may be used in an engineered flooring install.

What type of plywood should be used under hardwood flooring?

CDX plywood
Hardwood flooring: Plywood is the best subfloor for hardwood flooring installation. CDX plywood ranging from 1/2 to 3/4-inch-thick and rated A/C will serve well for any hardwood flooring installation. Tongue-and-groove plywood is available to reduce squeaks and help the subfloor fit together better.

What should I put between floor and subfloor?

Flooring underlayment is a thin material that rests between the floor covering above and the subfloor below.

What do you put between subfloor and underlayment?

Use building paper! Yep, put down an underlayment of 15-pound felt building paper between a wood subfloor and your hardwood planks, and you can reduce the chance of squeaky floors and control moisture.

Do I need two layers of subfloor?

Almost no one puts down double-thick subfloor in residential applications (for cost and handling reasons), and both layers need to be fastened to joists. Only thin underlayment can be fastened just to the subfloor.

What goes between subfloor and plywood?

On a plywood subfloor, you need either a layer of cement backer board or an underlayment membrane, like Custom Building Products’ Wonderboard and RedGard, between the subfloor and tile for the thin-set adhesive to achieve a good bond.

Should you put a vapor barrier between subfloor and underlayment?

It is rolled out between the actual laminate flooring planks and the subfloor. Very often, particularly in a below-grade installation on a concrete basement floor, a vapor barrier is recommended in addition to the underlayment. That vapor barrier would go between the subfloor and the underlayment.

Can you use subfloor as your floor?

Concrete subflooring is acceptable as regular flooring, as long as it’s in a moisture-proof environment. Consider the long-term effects of leaving your subflooring exposed.

Can you tile over CDX plywood?

Tile can be laid on plywood. But do not install tile directly on the plywood subfloor itself. Use an intervening layer of a sheet of thinner plywood.

How do you waterproof a subfloor?

Seal with Silicone
  1. Using a caulk gun and silicone seal, fill the seams between the floor and the wall.
  2. Fill any cracks in the floor as well.
  3. Cracks and gaps will attract moisture, so sealing them completely is an important step in making sure your floors are entirely waterproofed.
  4. Allow to dry for 24-hours.

How do you make plywood floors look nice?

  1. Step 1: Apply the Base Coat. Brush or roll a coat of floor-grade primer to seal the grain and prevent bleed-through, wait for it to dry, then apply a coat of floor enamel. …
  2. Step 2: Draw Planks. …
  3. Step 3: Gouge the Lines and Stain the Floor. …
  4. Step 4: Make a Glaze. …
  5. Step 5: Paint the Grain. …
  6. Step 6: Apply Clear Finish.

Can you put Redgard on plywood?

What is exterior grade plywood?

Exterior plywood is weather (and water) resistant, so it’s strong enough to be used outside and also in areas that are exposed to water and humidity, like a garage. This type of plywood, often made from Douglas fir, is made stronger by adhering its layers with a waterproof glue.

How do you waterproof a bathroom subfloor plywood?

To waterproof the plywood yourself, first repair it if needed and then sand it down and clean it off. Use a waterproof sealant, stain or paint and apply two to three layers. Allow each coat to dry thoroughly before painting the next one.

Can I use Aquadefense on plywood?

MAPELASTIC AQUADEFENSE

Ready to use, flexible, ultra rapid drying waterproofing membrane for interior and exterior use in showers, wet rooms and on balconies*. Can be tiled after 4 hours. For use on screed, render, concrete, plywood and ceramic finishes.