Leaking pipes, poor drainage, or excessive indoor humidity can cause the wood to expand, cup, or buckle. Water can also damage the subfloor, leading to uneven surfaces. Foundation problems: If your home's foundation shifts or settles, it can cause the floors above to become uneven.
Foundation Cracks
Even minor cracks can create uneven areas. Regardless of your flooring type, you will notice these differences. On hardwood or tile floors, pieces may pop up and become displaced. Uneven floors are often the first sign that your home requires professional foundation repair.
In some cases, uneven floors may simply be caused by settling foundation or changes in temperature and humidity. However, more serious problems, such as foundation damage, can also cause floors to become uneven.
There are various reasons why a floor feels uneven when walking on it, but the most common causes are subfloor issues and differential settlement.
Subfloor unevenness cannot be greater than 3/16 of an inch over a 10-foot span or 1/8 inch over a 6-foot span. Subfloors must not slope more than ½ inch per 6 feet (25 mm per 1.8 m) Subfloors must be structurally sound.
The Cost of Fixing Uneven Wood Floors
The cost to fix uneven wood floors can vary widely depending on the cause, severity, and repair method. On average, homeowners can expect to spend anywhere from $5 to $60 per square foot for repairs.
Uneven floors are most common in old homes because the home's foundation shifts over time.
Though floor sloping is a common problem, it isn't purely a cosmetic problem. Floor sloping can indicate that there's a much more severe issue at hand. Sloping floors can signify that there is significant structural damage to a home's foundation, warped floor joists, or water damage requiring foundation repair.
Vertical cracks are often less concerning and may result from normal settling. Horizontal or diagonal cracks, especially those wider than 1/8 inch, may indicate more serious problems. Multiple cracks or those that form a pattern (like stair-step cracks in brick walls) often signal foundation issues.
Uneven floors pose a serious risk of slips, trips, stumbles and falls. Our feet instinctively know to expect even and consistent flooring. Have you ever walked onto uneven flooring? It's a jarring experience, even if you don't fall down.
So, if your home has uneven floors, you should contact a foundation repair professional and request an inspection. Problems caught early can be less expensive to repair.
Uneven Floors
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.
In general, if your floor slopes more than 1/2 an inch over a horizontal distance of 10 feet, then it's likely you'll need to repair it. But while that ratio is a useful guide, answering the question of how much floor slope is too much is more a matter of personal preference.
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.
Both vinyl and laminate floors are versatile and durable options that can be installed over slightly uneven surfaces. They are relatively inexpensive, easy to clean and maintain, and come in a wide range of patterns and colors so you don't have to sacrifice style for function.
When your floor drops, dips, or slopes, it often means you need floor joist repair near you to address sagging floor joists. Because the ends of floor joists rest on the sill plate, water damage often spreads from the sill plate to the floor joists. Another common issue—especially in older homes—is notched joists.
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.
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.
House Lifting Cost
House lifting costs $10,000 to $40,000 just to elevate the structure. The average cost to raise a house above the flood zone is $20,000 to $80,000 for piers or pilings. The average cost to lift a house and replace the foundation is $20,000 to $100,000, or up to $150,000 to put in a basement.
This rule says you should use three flooring types at maximum throughout the whole home. For example, you might use hardwood in public areas of the house, except the kitchen and bathroom, where you use vinyl linoleum.
This type of sagging usually doesn't mean there is a structural issue to be overly concerned about. Most of the time it's a cosmetic issue and can affect the comfort of the space. Having one nice level plane of flooring can be a big improvement to how the space feels.
Use an underlayment, floor leveler or floor patch product to fix low spots in a wood or concrete subfloor. An underlayment is a thin layer of material sandwiched between two other materials. It's used to help insulate, absorb sound and reduce wear on your floor. It can also serve as a vapor barrier.