Uneven Subfloor An uneven surface on the subfloor or concrete slab on which the floor is laid can cause bouncing or lifting. While a self-leveling compound may be able to level concrete slabs, a severely uneven subfloor may need a practiced contractor to fix the issue.
Uneven floors are not only harsh on the eyes, but they're a hazard to the home. Sagging floors can indicate there's damaged wood under your flooring, that one of your supports is deteriorating, or that there are problems with the foundations.
You may be experiencing bounce in the floor structure. That's pretty common in production-built homes where the builder has pushed the spans and spacing of floor joists to the allowable maximums.
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.
Most homeowners pay between $1,000 and $8,500. Costs vary greatly depending on the type and extent of the damage. Sagging floor repair costs an average of $1,000 to $8,500.
Technically, yes – sagging floors can collapse if left unrepaired. But your home will give you warning signs first. Ignoring them can lead to further deterioration and issues such as cold air leaks, pests, wall separation, and collapsing floors. Sagging floors rarely collapse immediately, but they always worsen.
Often, floor bounce can be reduced by simply tightening loose connections: Locate areas where the subfloor may have separated from the joists. Drive screws through the subfloor into the joists to secure any loose sections.
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.
Moisture is the number one cause of floor lifting. This is especially true in places like bathrooms and kitchens which typically have more humidity than other areas. When moisture gets into your floors, it makes the planks swell and buckle. This leads to the floor lifting up.
Improper Load Distribution or Excessive Weight
Overloading a floor not designed to support high loads or uneven distribution of heavy furniture can stress floor joists and cause them to bow, crack, or even collapse.
Generally, if your floor rises or falls more than half an inch over a horizontal run of 10 feet or less, you should call someone about your sloping floor. This degree of slope indicates that there is likely a problem with your floor or your foundation. With that said, it's also important to consider comfort and safety.
There are four main culprits behind this common flooring problem: excessive moisture and humidity, poor installation, lack of acclimation, and subfloor issues.
Sagging floors are almost always a sign of a deeper structural problem that needs to be fixed. While it's possible to perform an inspection yourself, the job is better left to a trained professional.
Floor joist repair costs between $1,000 and $20,000, or an average of $6,000, depending on the extent of the damage and the size of your room. The typical cost to repair joists and other parts of your flooring is $10 to $67 per square foot.
Causes of Bouncy Floors in Your Home
Over Spanned Joists: Joists supporting floors above crawl spaces may be spaced too far apart or be too long, causing excess flexing. Inadequate Support: Insufficient support structures like poorly installed or shifted posts and beams can lead to bouncy floors.
If you are wondering who you should call for help with repairing a saggy floor, you can contact a sagging floor or subfloor repair specialist. Ensure that you hire a reputable company with skilled technicians who can also give you an estimate on the cost to replace the subfloor or repair any sagging floors.
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.
Moisture damage is one of the primary causes of a floor bulging upwards, often resulting from high humidity levels, leaks, or inadequate moisture control.
However, the uneven floor may be an indicator of a larger, unseen problem with the house. If your potential new home has buckling floors, you should immediately consult a home inspector to investigate the root of the problem.
Typically, wood joists have the cross section of a plank with the longer faces positioned vertically. However, engineered wood joists may have a cross section resembling the Roman capital letter "I"; these joists are referred to as I-joists.
Given the complexity of subfloor repairs, you should really stick with a carpenter for this project. But if you want to install a new subfloor or underlayment over sound floor joists, hire a local flooring contractor for this step.