A laminate or wood floor will 'bounce' when there is a substantial gap between the underside of the wood/laminate plank and the sub-floor. The feeling of bounce is caused by the flooring moving downward when weight is applied (stepped on).
If no gap was included, then there's nowhere for any expansion in the boards to go but up, causing the bouncing sensation when you walk on the floor. The good news is that this issue can be fixed by trimming away a narrow strip of laminate at the very edges of the floor to create an expansion gap.
Sagging or bouncy floors problems are often caused by a weak floor joist that has sagged under the load of people walking on the floor above. If the issue is caused by just one or two joists, you can probably handle it yourself by attaching a “sister joist” to the original ones.
The solution to sagging floors, or the damaged sills and joist ends that contribute to them, often involves jacking. A common scenario is to install temporary jack posts and support beams, then permanent posts and beams over new footings.
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.
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.
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.
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.
Improper Acclimation – When installing the laminate floors, it's important to ensure that it has acclimated to the room's humidity and temperature. If the floors do not acclimate properly, it might expand or contract in extreme conditions, resulting in a bouncy floor.
A floating floor can have a slight bounce or give underfoot, but it should not feel excessively bouncy or unstable. A small amount of deflection is normal and can be caused by a number of factors, such as the type of subfloor, the thickness and quality of the underlayment, and the installation method.
Floor deflection is common in older homes because the floor joists often are smaller or are spaced farther apart than the joists in modern homes. Of course, new homes also can have bouncy floors if the joists are approaching the maximum spanning distance for the building loads they are supporting.
Bouncy Floors
If you hear rattling every time you walk around a corner, the floors are probably getting by with minimal support. Bouncy floors cause furniture and other items to shake and vibrate due to inadequate support. If the floors do not feel firm, that's a sign the floor joists need more support.
These are all signs that your floor joists are weak or over-spanned and need additional support to hold up the weight of your home. It's important to consult with foundation repair professional before the problems get worse. What Causes Bouncy Floors?
You will notice the floors sloping to one side, or sagging in the center. The floor may feel oddly bouncy or soft, or have high and low places. These are all signs of a deteriorating floor structure. But even if your main beam falls down, it won't immediately take out the entire floor.
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.
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.
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.
Safety factor is a measurement with which your floor was designed to support loads without collapsing. Most homes have a safety factor of 40 PSF (pounds per square foot).
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.