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How Thick Should Subfloor Be?

How Thick Should Subfloor Be? The thickness of a subfloor should be based on the weight it will be supporting. Heavier items, like appliances or furniture, need a thicker subfloor to prevent them from sinking through the floor. For most homes, a subfloor thickness of 7/8 inch is adequate.

How many layers of subfloor can you have? Subfloors can be installed on the basement or ground level of a home and provide waterproofing, insulation, and a layer of protection from noise and weather. A typical floor may have two or three layers.

Can you lay a new subfloor over old subfloor? If the old subfloor is still in good condition, you can lay a new one over it. However, if the old subfloor is damaged or has other problems, you will need to replace it.

Can I put plywood on top of plywood? Yes, you can put plywood on top of plywood.


Frequently Asked Questions

How Do You Install A Subfloor Over An Existing Subfloor?

When a subfloor is installed over an existing subfloor, the installer must determine where the floor joists will overlie the subfloor. To do this, the installer uses a survey tool to mark out the areas where the floor joists will overlie the subfloor. Then, the installer ties down each joist to a long board and then ties down two of the shorter boards to form a crossbar. This crossbar must be located at right angles to the existing joists. The installer then installs the subfloor into these crossbars.

How Do You Add A Second Layer Of Plywood?

Adding a second layer of plywood to a project can help improve the strength and durability of the finished project. The second layer can be used to protect the first layer from damage or scratches, and can also be used to add extra insulation orprotection.

Can You Have Two Layers Of Subfloor?

Yes, subflooring can have two layers. The first layer is the flooring and the second is the insulation.

Can You Stack Plywood For Subfloor?

Yes, stack plywood for subflooring. This will create a stronger and more stable floor surface.

Can You Put New Plywood Over Old Subfloor?

Yes, plywood can be put over older subflooring to cover any existing damage.

Can You Layer Plywood?

Yes, plywood can be layered to make a variety of craft projects. For example, one could layer plywood and masonite for a woodburning stove project or place together two layers of plywood and two layers of masonite for a DIY wall build.

How Many Layers Of Plywood Do You Need For A Subfloor?

There are three types of plywood that are used in subflooring: nailing board, MDF, andWoodPanel. A subfloor must have at least one layer of each of these three plywood types.

Do I Need 2 Layers Of Subfloor?

There are a few factors to consider before making the decision to have subflooring. The first is the specific needs of the construction project – is it for a single-family home, a duplex, or a series of homes? Secondly, what type of subflooring system will be used. Are you using an adhesive backer board or a self-adhesive floor system? Thirdly, do you need totighten the screws down very tightly when installing subflooring to keep them in place over time? Finally, if you are using a self-adhesive backer board system, is it safe to subject it to moisture and insects?

How Thick Does The Subfloor Need To Be For Hardwood Flooring?

A subfloor should be at least 1/4 inch thick for hardwood flooring.


There is no definitive answer to this question as it can vary depending on the specific application, but a subfloor should generally be at least 1-1/2 inches thick.

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