The average cost to repair a sagging floor can range from as little as $1,000 to as much as $10,000, depending on what's causing the problem. The only way to know for sure how much you'll have to spend is to get an inspection and a quote from a professional.
The typical costs for repairing sagging floors start at $1000 and can go up to $10,000, with the average rate being around $300 per square foot.
Does home insurance cover foundation movement or sagging floors? Foundation damage caused by shifting or settling earth or sagging floors caused by rotting floor joists are typically not covered by homeowners insurance. If the damage is caused by flooding or an earthquake, you'll typically require separate coverage.
One of the good things about floor deflection is that it is repairable. The bad news is that it often takes a long time. The solution to sagging floors, or the damaged sills and joist ends that contribute to them, often involves jacking.
Instead, hiring a flooring repair contractor may be the better option, especially when it comes to leveling floors in old houses. Homeowners can expect to pay between $2 and $30 per square foot of professional floor leveling, depending on the required approach.
If you want to raise the height of a floor, the cheapest and easiest way is to add a thick underlayment designed for the job. There are other options too like adding a framed wooden subfloor or floor leveling compound before installing new flooring.
What Happens if You Don't Fix Sagging Floors? If you ignore sagging floors, it can lead to consequences such as property damage that your insurance company may not cover. It can also lead to injury when someone trips or falls on uneven floors, or even property loss if the damage is great enough.
Owners of old homes might learn to experience springy or slanting floors as part of the charm, but they are signs of structural damage. As a home buyer, look at whether the floors pitch at all or take a piece of string to test the floor's deflection.
Sagging floors are a sign of serious damage to the joists beneath your home and the structure of your home overall. Left untended, this can lead to injury, property loss, and disaster. Worse, insurance companies often will not pay for such losses or repairs if you ignored the issue once the early signs became visible.
Many homeowners and owners of commercial property have dealt with a sagging floor. Floors can sag for many reasons. For instance, they may sag due to the natural settling of your property or building materials over time. However, a sagging floor may also signify damage from water leaks or pests, like termites.
In layman's terms, this means typical 2-by-10 floor joists, spanning 16 feet, can be expected to sag about one-eighth to one-quarter of an inch. Not much; however, as the span increases, so does the amount of deflection. In any case, the floor system can be repaired.
Sometimes, the signs of sagging or sloping floors in your home are as easy to spot as they sound. Your floors may visually appear slanted. You may even notice objects roll when dropped on the floor. This occurs because the foundation has improperly settled, creating the sloping.
Uneven floors in a house are usually a sign of a foundation problem, but not always.
What Causes Uneven Floors? The term “uneven floors” is used to describe any floor surface that sags, bounces, buckles or slopes. As mentioned above, it's common to find slanted floors in a house more than 15 years old due to the home's foundation shifting over time.
While sagging floors are unsightly, they can be dangerous as well. A sagging floor means that it has lost support, and it may eventually collapse into lower levels of the home. The overall structure of your home could be at risk, therefore making repairs a priority is imperative.
If the floor sags more than a few inches, it may collapse completely, putting everyone in your house in danger. Sagging floors can also cause misalignment of doors and windows, making them harder to open and close. Sagging floors can even crack the walls of your home in extreme circumstances.
In some cases, a slight slope may be normal and not cause for concern. However, if the slope is severe or getting worse over time, it could be a sign of a serious problem that requires immediate attention. One potential risk of sloping floors is damage to the structural integrity of the home.
Average Cost to Level the Floor in a House
On average, you are looking at about $3 – $5 per square foot. So, for a 100 square foot slab, it would generally cost between $300 and $500.
You can tell if a floor will collapse by looking at the floors for foundation damage (cracks, uneven floors, bowing, etc.), but the warning signs can also appear as cracks in walls or window frames.
Humidity and moisture can cause severe problems for floor joists. When exposed to damp conditions, wood can rot and become weak. This can lead to sagging floors and even floor collapse. Also, damp environments attract pests like termites and carpenter ants that can damage floor joists.
Water Damage Can Cause Sloping Floors
Groundwater can rise up and infiltrate the cracks in a home's foundation. Leaks can also find their way into cracks or rot wood, causing damage to a home's foundation. Water damage can severely damage floor joists, causing them to sag and create unevenness in one's floor.
For homes where this is the case, the subfloors likely need to be replaced. According to Angi and HomeAdvisor, the cost to replace a subfloor ranges from $428 to $2,978, with a national average of $572.
Excessive Weight on a Floor
However, if load-bearing supports are not installed properly, this can cause a floor to collapse. Additionally, some floor collapses can be caused by an excessive amount of people standing or jumping in an already weak area of a floor.