9 Common Signs of Subfloor Damage

1. Your floors are uneven or sunken in parts.
2. Your floorboards squeak – loudly.
3. The room smells musty.
4. Your floors shift or bounce when you walk on them.
5. Your toilet is rocking or loose.
6. Your tile flooring has cracked.
7. Your hardwood floor is cupping.
8. Your linoleum floor is bubbling up.

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Similarly, you may ask, can you walk on subfloor?

If it isn't safe, then it isn't a suitable sub floor. Sometimes it's easier to cover an old linoleum floor with 1/4 inch plywood, than it is to scrape the old floor off. If dust is an issue, as in laying tile, once the subfloor is prepped and ready, you dont want to walk on it, but it is safe.

how long does it take to replace subfloor? Replacing a small portion of subfloor can be quick and easy for a professional, however replacing an entire floor will take much longer, anywhere from 8-24 hours. In order to replace the subfloor, the finished floor needs to be removed first. If there is an underlayment that will also be removed.

Likewise, people ask, is a subfloor necessary?

While a subfloor is not necessary to add structural strength when you'll be laying finish flooring on top of a concrete slab (as in a basement remodel), subflooring over concrete offers two other advantages: If necessary, place sleepers (mini-joists) to raise the subfloor above a very damp concrete slab.

Can I put new 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.

Related Question Answers

How much does it cost to replace a subfloor?

Cost to Replace, Repair or Install Subfloor The average cost to replace or repair a plywood subfloor in a 306-square-foot room costs $555, or between $490 and $600. The average cost to install a new plywood subfloor is $620, or between $572 and $720.

Can you use subfloor as your floor?

Wood subflooring isn't designed to be the top layer of flooring. Well-constructed wood subflooring is sturdy, but using it as regular flooring could damage its surface and reduce its lifespan.

Does wet subfloor need to be replaced?

Does a wet subfloor need to be replaced? In cases of extensive water damage, drying the subfloor after a flood can be very difficult, and that complicates repairs. Soaked wood quickly develops mold and rot that impacts adjacent framing and drywall. In this kind of situation, it's best to replace the entire expanse.

Why do campers get soft spots in floor?

A soft spot in the floor of your RV—whether it's a motorhome, pop-up, or camper trailer—is something you simply cannot ignore. The soft spot usually means a leaking roof or perhaps plumbing problems, either now or at some time in the past. Dutchman travel trailer with a damaged floor.

How many layers of plywood do you need for a subfloor?

There are several methods, including: Floating subfloor: There are two common methods for this. The first is to lay two layers of 3/8-inch plywood over the slab without fastening or gluing them to the slab. One layer is laid, and the second layer is stapled or glued perpendicularly or diagonally over the top.

Does subfloor go under bathtub?

Flooring repairs can be intimidating, but the subfloor under the tub generally consists of plywood secured over floor joists and is fairly simple to replace -- once you get access to it. The entire tub unit requires removal before subfloor replacement can begin.

What is the difference between subfloor and underlayment?

The subfloor is the bottom most structure of the floor. It provides a flat and stable surface and supports the actual floor. Underlayment is different from the subfloor in that it rests between the subfloor and the actual floor.

Can I use drywall screws for subfloor?

Drywall screws should only be used for drywall, and a temporary coat hanger. You want more strength and need less space for the threads to secure the subfloor. The drywall screws have a lot of thread to hold the drywall itself, but have very little shear strength. In the field between the joists, they are fine.

Do you nail or screw subfloor?

When you use a nail gun to attach subfloor sheathing to the floor joists, the nail sometimes misses the joist. Remember, nails can pull up; screws don't. This gives us stronger floors that will not move or squeak.

Can you just paint subflooring?

As long as your subfloor is solid it can be painted. It sucked right into the wood and helped prepare the surface for paint. I used a brush around the perimeter of the room and a roller for the rest of the floor. The first coat was dry in 30 minutes, so I had the two coats on in under 2 hours.

How do you fill gaps in subfloor flooring?

Fill Plywood Subfloor Gaps An effective strategy for filling large gaps is to mix patching compound to a stiff, mortar-like consistency, trowel it into the plywood subfloor gaps and wait for it to stiffen before troweling it smooth. Some sanding may be needed when it sets completely.

How much does it cost to fix squeaky floors?

Fixing squeaky floors can cost anywhere from $200 to $1,000 or more.

How do I know if my subfloor is damaged?

9 Common Signs of Subfloor Damage

1. Your floors are uneven or sunken in parts.
2. Your floorboards squeak – loudly.
3. The room smells musty.
4. Your floors shift or bounce when you walk on them.
5. Your toilet is rocking or loose.
6. Your tile flooring has cracked.
7. Your hardwood floor is cupping.
8. Your linoleum floor is bubbling up.

How thick should a subfloor be?

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.

What screws should I use for subfloor?

Steel Screws The proper steel screw sizes for securing 3/4-inch plywood to the floor joists are #8, #10 and #12 screws. The number refers to the thickness of the screw. Each is available in lengths from 1 1/4 to 3 inches. Typically, the 3-inch variety is used to secure plywood subfloors.

What is a subfloor in a house?

Joists are typically made of engineered wood, laminated wood, or dimensional lumber. Subfloor. The subfloor is the next layer above the joists and acts as a foundation for both the underlayment and surface levels of flooring. A subfloor provides a stable, level surface that new flooring can be easily installed on.

Can I put a subfloor over concrete?

How-to install a wood subfloor over concrete. You need a dry, clean and flat surface before you can install finished flooring in a room built on a concrete slab. One of the simplest options is a sleeper-based subfloor. The result is a subfloor that protects finished flooring from cold and damp concrete-based floors.

What is a subfloor in a bathroom?

Installed directly over the joists, the primary function of a subfloor is to create a flat solid surface for the finished flooring to rest on. Generally, this only refers to a layer of plywood but in the case of bathrooms, it includes an underlayment of concrete backerboard as well.

Does subfloor go under walls?

1 Answer. If the couple of inches of flooring you have not removed at the wall is solid, you can screw through it and into a piece of wood below it that the new floor can also be screwed to in order to make the edge supported, in a somewhat easier fashion.