How do I know if my subfloor is bad?

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Here are five signs it’s time to replace a subfloor.

  1. Those squeaks could be calling for your attention. …
  2. Sinking sections are tell-tale signs of subfloor failure. …
  3. Moisture could be causing your cupping floorboards. …
  4. Cracked and popping tiles could be a material issue. …
  5. Possible water damage is always a concern.

Thus, Do walls go on top of subfloor? 1 Answer. Show activity on this post. Utterly standard – the subfloor goes on, then the walls go up. Doing it any other way is rather fraught with difficulties to no benefit.

Additionally Is replacing subfloor expensive? For a DIY job with low-cost materials, a homeowner might pay as little as $428 for the same room, or as much as $2,981 to hire professionals to install premium subflooring. To replace concrete slab subflooring in the basement of a 1,500-square-foot home, expect to spend at least $9,720.

How do you fix a rotted subfloor underneath?

Can I put new subfloor over old subfloor? Install a layer of at least 1⁄2” 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.

How do you remove a rotted subfloor?

How do you replace a rotted subfloor under a load bearing wall?

Instructions

  1. Remove the Baseboard. …
  2. Remove Sections of Drywall. …
  3. Remove the Floor Covering. …
  4. Remove Any Underlayment. …
  5. Cut Away the Nails. …
  6. Cut Away the Subfloor. …
  7. Remove the Subfloor From Under the Wall. …
  8. Remove Subfloor From the Other Side (If Necessary)

How do you replace a broken subfloor?

How do I know if my subfloor is rotten?

How do I know if My Subfloor is Rotten? A water-damaged subfloor feels spongy underfoot. It might bounce or squeak when you walk across the room. Sagging boards, damp spots and unpleasant musty smells are also signs of a rotting subfloor.

What does subfloor mold look like?

Even if you have access to professional moisture detection meters, subfloor mold can be difficult to discover. Perhaps the easiest means of detecting a subfloor mold problem are seeing discoloration on vinyl flooring, warping or distortion in areas of flooring, or the presence of malodors.

How do you replace a subfloor in an old house?

How thick should a subfloor be?

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. There are several factors that determine what subfloor thickness is optimal for added benefits like insulation.

Do you 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.

Is OSB better than plywood?

Wood fiber is used more efficiently in osb. Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists.

Can you walk on subfloor?

Subflooring is sturdy and strong, but definitely not pleasing to look at or walk on.

Is it OK to live on subfloor?

Well-constructed subflooring is built to withstand the weight of interior walls, a roof, household furniture, finished flooring, and people. However, wood subflooring isn’t designed to accommodate daily wear-and-tear, moisture or soiling. Concrete subflooring is generally durable enough to withstand daily use.

Should subfloor be screwed or nailed?

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.

How do you fix a rotted subfloor?

How do I replace my upstairs subfloor?

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