How do you install plywood over plywood subfloor?
- Step 1: Remove Old Flooring. It may seem obvious, but the first step to adding a second layer to your subfloor is to remove the old flooring. …
- Step 2: Remove Underlayment. …
- Step 3: Decide on Plywood. …
- Step 4: Acclimate Plywood. …
- Step 5: Install Plywood. …
- Step 6: Keep in Mind.
Should I put plywood over subfloor?
Plywood underlayment is typically needed when a floor material must have a very smooth, flat surface. For example, if you install resilient tiles or sheet flooring over a subfloor, any bumps, dips, or voids in the subfloor may be evident in the finished flooring.
Should plywood underlayment be glued to subfloor?
No, you should not glue down your underlayment. Underlayment is is a floating material, the same as your laminate flooring. In most cases, you should not glue or nail your underlayment down.
Can I use 2 layers of plywood for 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.
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.
Can you screw plywood to subfloor?
Most construction experts use 3-inch steel screws for plywood subfloors. To find out which length of screw you’ll need, you first have to know how thick the flooring is. You’ll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it.
How do you secure plywood to subfloor?
Attach the smaller piece to the subfloor with a 1-inch wood screw every six inches in each direction using a power drill. Push the full sheet tightly against the small section of plywood and the wall, and attach to the subfloor with a screw every six inches.
What goes on top of 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.
Which way do you lay plywood subfloor?
Ply should always be laid with the grain running across the joists, not along the joist, to maximise the strength. Laying them length ways down a joist will cause them to crack along the grain which could end up in serious injury and or damage. The smaller the gap between joists the stronger the board will be.
Should you glue second layer of subfloor?
Adhesives should not be used to fasten the two layers together. Install second layer on top of the first layer inside of the wall studs. A minimum ¼” gap is required between the second layer and wall perimeter.
Should you nail or screw down subfloor?
Ideally, nail down your subfloor using corrosion-resistant nails that will securely hold it in place and last a long time. Screws are a great alternative that you can easily remove, but they are not as sturdy. Screws are superior in terms of reducing floor squeaks, but the installation is slower.
What do you put between subfloor layers?
Foam, felt and rubber are the best choices for laminate underlayment.
Should you put a vapor barrier between subfloor and underlayment?
Therefore, because concrete is porous, it’s a good idea to install a vapor barrier over your concrete subfloor before installing your flooring. This way you can stop the vapor drive of water upward to your floors, protecting them from any damage (source).
Do you need vapor barrier between subfloor layers?
If there is no barrier, once the plywood subfloor starts to develop moisture, the moisture can create mold, which can destroy your flooring. If you have carpet, it can cause mold and mildew to grow through it.
What is the difference between subfloor and underlayment?
Basically, subfloors are a structural part of your home that provide strength and rigidity to your home’s flooring. Underlays, on the other hand, protect your floor covering from moisture, help soundproof your floor, and offer cushioning and comfort underfoot.
How thick should underlayment be?
Underlayment. Underneath the top flooring layer is often (though not always) an underlayment. It comprises padding materials and is typically about 1/4 to 1/2 inch in thickness. The purpose of the underlayment is to provide a sturdy yet comfortable layer for your outer flooring to sit on.
Can plywood be used as underlayment?
Plywood underlayment is the layer of plywood that is fastened over the structural subfloor. It creates a uniform, smooth surface for resilient flooring, vinyl tile, ceramic tile, carpet, engineered flooring, and wood floors.
How do you install plywood underlayment?
Quote from Youtube video: Stand on each panel during fastening to ensure full contact with the subfloor fasten. The 8-foot edge two inches on Center. And a half inch from the panel edge.
How do you secure plywood underlayment?
Fasten the 8′ edge first at 2″ on center – 1/2″ from edge – starting from the corner of the room. Leave an expansion joint of 1/8″ to 1/4″ between the panel and the edge of the walls. Stand on the panel to ensure flush contact with the structural subfloor, and do not overdrive the fasteners.
Does plywood underlayment need to acclimate?
Be sure subfloor is clean and free of debris. Any uneven subfloor joints should be sanded so the joints are even. Acclimate the plywood underlayment panels 24 hours in the area the panels will be installed and 48 hours in extreme conditions. Separate and store panels vertically to allow air passage on all sides.
