Table of Contents
- 1 Do I need 2 layers of subfloor?
- 2 What thickness of plywood do I need for a subfloor?
- 3 Is 3/4 plywood enough for a floor?
- 4 Is it better to use OSB or plywood for subfloor?
- 5 Can you use 1/4 inch plywood flooring?
- 6 How much weight can a 1/2 inch piece of plywood hold?
- 7 How thick should plywood flooring be on a slab?
- 8 What is the average thickness of a subfloor?
- 9 How many layers of flooring should you have in your home?
Do I need 2 layers of subfloor?
That’s the usual approach. 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 thickness of plywood do I need for a subfloor?
about 5/8 inch
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.
Is 3/4 plywood enough for a floor?
The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Some experts suggest that 15/32-inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less, but slightly thicker 3/4-inch plywood should be used for joists spaced further apart.
Is 1 2 plywood strong enough for a floor?
Thick plywood sheets are durable, but they’re also heavy, and it may be safer to use 1/2-inch plywood — which is actually 15/32 inch thick — to avoid loading the ceiling joists with extra weight.
Should I glue second layer of subfloor?
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.
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 use 1/4 inch plywood flooring?
Most underlayment-approved plywood is at least 11/32 inches, the standard recommendation. Some professionals, however, will use plywood as thin as 1/4 inch for resilient flooring if the subfloor is in particularly good condition.
How much weight can a 1/2 inch piece of plywood hold?
The lowest amount of layers (3 ply for 3/8” & 1/2”,4 ply for 3/4”, 5 ply for 1”) Plywood fixed at both sides, with the wood grain running parallel to the span….How Much Weight Can Plywood Hold? Strength By Thickness.
| Plywood Thickness | Approximate Max Pressure |
|---|---|
| 3/8″ | 22psf |
| 1/2″ | 35psf |
| 3/4″ | 80psf |
| 1″ | 164psf |
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.
What do you put between subfloor layers?
To prevent this noisy problem, it’s standard to install a layer of 15-pound felt paper between the subfloor and the hardwood planks. The building paper is relatively inexpensive and provides a cushioning barrier that keeps the two flooring layers from making contact.
How thick should plywood flooring be on a slab?
When installing a plywood subfloor on top of the slab at grade, the thickness is governed by how long the fasteners for the flooring will be. Floor joists are made from 2-by-8-inch or 2-by-10-inch lumber, or from engineered quiet beams, which are made from a thin layer of chipboard on edge between two lumber caps forming an “I” shape.
What is the average thickness of a subfloor?
Typically made of plywood or OSB and ranging in thickness from 19/32″ to 1 1/8″ thick, the subfloor is truly structural, second only to joists in this respect. Subfloor holds up all of the above layers of flooring, as well as everything in your house—people, dogs, cats, pianos, furniture. All houses have subfloors.
How many layers of flooring should you have in your home?
On the other hand, the floors sometimes have more than three layers. A prime example: old homes that have been extensively remodeled. It is not unusual to see so many layers that a cross-section of the flooring looks like a wedding cake. There is little reason to have more than three layers of flooring (subfloor, underlayment, and floor covering).
What size plywood do you use for floor joists?
CDX Plywood. For retrofitting older construction, 23/32- and 3/4-inch-thick panels can be used over 24-inch on center joists. The heaviest rating is for 7/8-inch-thick panels, for which joists can be spaced 32 inches on center.
https://www.youtube.com/watch?v=O6uCke0Cl_w