Sagging sections in your flooring are an immediate, telltale sign that you have major issues with the subfloor. Flooring problems of this nature are almost always caused by moisture, but they can also indicate poor installation. During subfloor installation, end-to-end joints should meet on top of the joist.
In your bathroom, if you notice that your toilet moves when you sit down on it or get up from it, then that's a sign the subfloor is in need of a replacement. The toilet rocks because the subfloor underneath it has rotted or is otherwise so damaged that it can no longer properly hold your toilet.
If your floors begin to feel spongy, springy or bouncy, or if you notice the floorboards around you shifting when you walk on them, it could mean that it's time to replace your subfloor.
A wet subfloor doesn't always need to be replaced, but it must be thoroughly dried and assessed for damage. Use fans and dehumidifiers to dry it out. If the subfloor is swollen, warped, or has mold growth, replacement is necessary.
Generally, no. Insurance would cover a sudden loss event. A slow leak causing rot over an extended period of time is not a sudden loss event.
Subfloor mold often shows up as dark spots or patches under your floors. You might find it under carpets, vinyl, or laminate. The mold can look like black, green, or white marks on plywood or OSB, which are common in homes since the 1950s. A musty smell is a sign of subfloor mold.
The cost to replace a subfloor is $2.20 to $4.75 per square foot on average. Subfloor replacement costs depend on the area size and location, labor costs, and material. Plywood and OSB are the most common and least expensive subflooring materials. Bathroom subfloor replacement costs $100 to $570.
Without waterproofing, water will eventually seep through grout lines and cracks in tiles, which can lead to serious structural issues. While you may not have to waterproof your whole bathroom floor, it is always ideal for the additional layer of protection and to ensure no damage to your property.
Homeowners insurance generally covers water damage that's sudden and accidental. For example, if a pipe bursts or a washing machine overflows and damages your floor, you may be covered. But if the water comes from flooding, standard homeowners insurance typically won't cover it.
There are many factors that can affect its longevity, such as the material, the amount of moisture it's exposed to, etc. However, most subfloors can last as long as the home itself. That said, you may have to replace your subflooring after 20 to 30 years if it has absorbed too much water too often.
Tips for Replacing a Subfloor
Use the same thickness of plywood as the rest of the subfloor. If your basement or crawl space is unfinished, you can find a label on the plywood that says the type of plywood and thickness you need. We used 23/32 OBS plywood. It's important to get the subfloor seam even and flat.
Check the Level of the Subfloor
To check for small high or low spots that may not even be visible, place a long level or straight pipe on the subfloor. Move it around to different areas and mark any high or low spots you find with a pencil or marker. Most floors will have at least some slight variations.
There are many signs that your damaged subfloor should be replaced with a new subfloor. These include squeaks and other noises, cupping or warping, cracked or popped tiles, sagging or unevenness, the smell of mold or mildew, or bubbling tile.
Cement board is best suited for: Ceramic and Porcelain Tile: Cement board is specifically designed to be a moisture-resistant substrate for tile in high-moisture areas like bathrooms and kitchens.
Tile flooring, whether ceramic or porcelain, is known for its durability and water resistance, making it an excellent choice for bathrooms, kitchens, and high-moisture areas. Properly installed and maintained tile flooring can last more than 50 years.
Shower floors must be waterproofed while walls are required up to 1,800mm. Bathroom walls must be waterproofed up to 150mm. The shower step must be waterproofed up to at least 100mm. The entire floor must be waterproofed if the room is not on the ground floor.
Subfloor materials are strong, but when water leaks beneath your finished flooring, the results can be expensive and disastrous. Subfloor water damage must be addressed immediately. Wet subflooring is not a problem that can wait.
Replacing a subfloor may seem like a daunting task, but with the right tools, materials, and know-how, it's a project that can be tackled by DIY enthusiasts or professionals alike.
Average Cost of Bathroom Flooring
The cost of the bathroom flooring material falls in the range of $1.82 to $2.39 per square foot. The national average cost is around $2.10 per square foot. The total budget, which includes the materials and labor cost, runs between $11.36 and $17.34, with the average cost being $14.45.
Sagging or Uneven Floors: A Clear Indicator of Structural Issues. Another critical sign that your subfloor may need repair is if you notice sagging or uneven floors. These issues are often more apparent in certain areas of the home, such as near doorways, in the middle of rooms, or along walls.
If you have mold in your subfloor, you have to act quickly to remove it. In addition to being a health hazard, mold can destroy your flooring and lead to costly and extensive repairs.
Homeowners insurance doesn't usually cover mold damage or removal unless it's the result of a covered peril. If the mold in your residence was caused by something sudden or accidental, such as a bursting pipe or some other covered incident on your policy, you may be protected.
Mould will easily grow and spread if the right conditions are present. So, dehumidifiers don't kill mould, but they can help to prevent it from growing inside your home by reducing humidity. However, the best way to deal with it is to get rid of its source.