First layer must be dry prior to laying the second layer. Place a layer of 15-lb felt on top of the subflooring prior to installing second layer. 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.
Can you double layer 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.
How do you add a second layer of plywood?
- 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.
Do you need two layers of subfloor?
3/4″ T&G ply as a first layer is necessary. By the book, you dont glue the one layer to the other. And you dont hit the joists when nailing the second layer down (per Tile Council of North America handbook for Ceramic Tile Installation, Method# F150-07. “Underlayment fasteners should not penetrate joist below”).
How do you layer a subfloor?
Quote from the video:
Quote from Youtube video: The second layer will be laid perpendicular to the first. Beginning at the back of the house and working toward the front spreading into the breezeway as they work multiple rows of sheathing.
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.
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.
Is it better to use OSB or plywood for subfloor?
OSB has a lower resale value than plywood due to its lower strength. For this reason, few homeowners prefer OSB in their homes. Apart from costs, plywood is superior in all the other areas, such as the strength of the structure. For this reason, it’s a superior material for use on the subfloor.
Should I glue plywood 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. You should always check with the installation instructions of the underlayment for proper installation instructions first.
Can you put subfloor over old subfloor?
One of the benefits of removing the old flooring is it allows you the chance to fix any loose subflooring or squeaks by re-securing the main subfloor to the floor joists prior to installing the new flooring. With all that being said though the answer is YES you can install New Wood Flooring over the old.
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.
Can I put plywood over subfloor?
Underlayment can also help protect the finished flooring from moisture, mold, and mildew. Plywood is a great underlayment to install over a subfloor. It is strong and durable and often very smooth without a lot of imperfections or knots.
Can you add plywood over a subfloor?
Install a layer of at least ½” or preferably 5/8” ply over the existing planks. This is particularly important if your old sub floor has lumps and bumps in it. If you don’t respect this thickness of ply, then you’re highly likely to see rises and falls in your new flooring.
Which way do you lay plywood subfloor?
Install plywood underlayment smooth side up. To avoid damage to the surface, install underlayment immediately before laying the finish flooring.
How many layers of plywood do you need for a subfloor?
If you are using plywood for your subfloor, you should use a minimum of one layer that is between ¾” and ⅝” thick. This thickness will suffice for most floors; however, codes will vary and a second layer is a good idea if your floor covering is going to be a heavy material like ceramic tiles or natural stone.
