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The thickness of subfloor needed generally depends on how far apart your floor joists are located. In most cases, floor joists are 16" center-to-center and the most common thickness of subfloor is 3/4". Some homes will have 1/2". If your floor joists are farther apart, you will need correspondingly thicker subfloor to adequately support weight between the wider joists. Your city's building codes department will be able to specify what you need (some cities may have differing requirements).

Another factor might be the kind of flooring you will install. For carpet, vinyl, laminate, wood and other non-rigid flooring types, the 1/2" or 3/4" will be adequate. For tile, the Tile Institute of America recommends no less than 3/4" subfloor on 16" centers floor joists - but with 1/4" backerboard installed on top of subfloor. See their website or contact your city codes department for specifics on a different span of joists.

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Q: What is thickness of sub floor needed?
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Related questions

What is thickness of sub flooring?

Generally speaking, the thickness of the plywood layed directly over floor joist.


What does sub floor mean?

A subfloor is a structural layer that provides a base for finish flooring to be installed on top of it. It is typically made of plywood or oriented strand board (OSB) and provides a flat, level surface for the finish flooring to sit on. The subfloor helps support the weight of the flooring, distributes loads, and helps with insulation and soundproofing.


What does sub-floor mean?

under a foundation of a sub.


Do you need a sub-floor in your basement?

Usually yes, a well insulated sub-floor will save you lots of money from heating. You can choose to build a sub-floor on 2x4 lumber with moisture barrier or use those sub-floor tiles (usually come in as 2x2).


Do you have to add a subfloor to subfloor of a bathroom before adding backer board?

Not usually, no. As long as the sub floor is solid, without water damage, etc then a backer board is usually plenty. You need to have 1 1/4" of sub floor and backer board when you put the tile down. Generally speaking, homes are built with at least a 3/4" sub floor and 1/4" cement backer board with 1/4" x 1/4" trowel of thinset equals this. If you are not sure, don't assume. Find a vent in the floor. Pull out the register vent and use a hand mirror to see the sub floor. Take a tape measure and measure its thickness.


Is the thickness of laminate flooring really important if you are on a cement sub floor?

The thickness is mainly for refinishing. Thicker wood can be refinished more times than thinner. If you are laying on a cement slab, you want to use a vapor barrier. Some flooring products have a barrier preinstalled on the undersideof the flooring.


What is the thickness of two by two mosaic floor tile?

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What is the purpose of a joist?

to support the sub floor.


How do you lay a basement sub floor?

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How do you make house using 2d shapes?

You cannot. A 2-dimensional floor has no thickness and so would not be able to hold up any weight.You cannot. A 2-dimensional floor has no thickness and so would not be able to hold up any weight.You cannot. A 2-dimensional floor has no thickness and so would not be able to hold up any weight.You cannot. A 2-dimensional floor has no thickness and so would not be able to hold up any weight.


What types of underlay are suitable for laminate flooring?

The type of underlay you need will depend on the type of sub floor or floor you are putting the laminate on is made of. If the sub floor is made of concrete, you would want vapor barrier underlay. If the sub floor is made of wood a standard or premium underlay would used.


What is the overall thickness of the glass floor of Spinnaker Tower?

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