Why is my floor collapsing?

Author: Bill Koch MD  |  Last update: Saturday, June 21, 2025

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.

When should I be concerned about sagging floors?

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.

Why did I randomly collapse on the floor?

Fainting is when you become unconscious or 'black out' for a brief period. You may collapse to the floor and may have a brief period of twitching while collapsed. Fainting is caused by a sudden drop in blood pressure (hypotension), which results in less blood flow to the brain.

Can a floor suddenly collapse?

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. That massive book collection or your gym-quality treadmill could do a number on your floors.

How do you fix a collapsing floor?

Sistering floor joists is a relatively straightforward and easy repair. It simply involves fastening new joists next to your damaged or sagging joists. The project will double the thickness of the framing member. You'll install the new joists right next to the old one.

Engineer talks about the floor collapse at Arapahoe County house party

How to fix a caving in floor?

If the sloping floor is caused by water damage, it's essential to replace any damaged subflooring. This involves removing the damaged section of the subfloor and replacing it with a new piece of wood. This will prevent further damage and help level the floor.

Does homeowners insurance cover floor collapse?

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.

Why does my floor feel like it's sinking?

These conditions are usually a sign of a more serious problem, such as wood rot in the floor joists, a sinking foundation, or crawl space structural problems. A sagging floor can also occur when floor support beams or a load-bearing girder experiences water damage.

How do I know if my floor joists are bad?

Telltale Signs of Damaged Floor Joists
  1. Moist, rotting wood.
  2. Skewed or unlevel door and window frames.
  3. Sagging, sloping, or uneven upstairs floors.
  4. Tilting or sinking crawl space supports.
  5. Cracks in the interior drywall.

What is the most common cause of sudden collapse?

Reflex syncope is the result of a reflex response to some trigger, in which the heart slows or blood vessels dilate (widen). This causes blood pressure to drop, so less blood flows to the brain and fainting (syncope) or near-fainting (pre-syncope) occurs. Reflex syncope is the most frequent cause of fainting.

Why do I feel like the floor is falling?

Benign paroxysmal positional vertigo (BPPV)

This is very common and usually develops because of a problem with the inner ear. Benign paroxysmal positional vertigo symptoms usually include feeling like the floor is tilting or like you're floating.

How do I know if my floor will collapse?

Walking on a level floor should feel stable and secure. If you notice that the floor is sloping or uneven in certain areas, it could indicate a potential problem with the building's foundation or structural shifts.

Do uneven floors always mean foundation problems?

If you're considering purchasing a home with uneven floors, don't wait to investigate the potential issues beneath the home's surface. The slope or slant of the floor may be a minor cosmetic issue, or it could indicate water damage or major problems with the home's structure or foundation.

What does floor buckling look like?

The most common signs of buckled hardwood flooring are cupping and crowning. Lifting is the hallmark of extreme buckling and typically will only occur after a major water catastrophe like flooding.

Is it safe to live in the house with 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.

How much does it cost to repair a sagging floor?

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.

How do you fix an unbalanced floor?

The best solution for uneven flooring is a latex floor screed. It is a powder mix that you can pour down on the uneven flooring and let it settle down by itself. Then you can use the wooden screen to even out the floor. A self-levelling compound like latex floor screed is excellent for a wide range of flooring.

Why would a floor collapse?

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.

Will insurance pay to replace entire floor?

Dwelling coverage, on your condo or homeowners policy, may pay to repair or replace your floors and carpet if they're damaged by a covered peril. For instance, if your home's floors are damaged in a fire, your home insurance may pay for new flooring, up to your policy's limits and minus your deductible.

What is considered major structural damage to a house?

Licensed home inspectors primarily look at the four pillars which are the foundation, floor, walls and roof. Cracking, sagging, shifting or missing features on any of the pillars may be considered structural damage if the ruin is severe.

Will insurance pay for foundation repair?

While homeowners insurance often covers foundation damage caused by sudden and accidental events, exclusions apply. Familiarizing yourself with your policy's coverage details and taking proactive measures to prevent foundation problems can significantly reduce the risk of costly repairs.

How to fix a floor that is sinking?

Jack Up the Floor

‍If your floors are sagging because of poor structural design, the best solution might be to install structural jack posts. These support pillars are gradually raised to slowly apply pressure under the sagging beams.

When should I be worried about uneven floors?

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.

Should I buy a house with sagging floors?

Uneven floors can be a hint that a host of underlying issues, like structural problems, might be happening. It's a serious mistake to dismiss sloping floors as part of an old house. Still, uneven floors do not have to be a make-it-or-break-it factor in buying your new-to-you home.

Previous article
How to prevent vinyl from peeling off a shirt?
Next article
Do you need an electrician to install an ecobee?