Why Are My Floorboards Sinking?
If your floors feel uneven, soft, bouncy, or noticeably lower in certain areas, the problem may extend beyond the flooring itself. Floorboards sinking can indicate weakened floor supports, excessive crawl space moisture, shifting structural components, or inadequate support beneath your home. Ignoring these warning signs can allow the problem to worsen and potentially affect other areas of the structure. Call TFS – The Foundation Specialists or fill out the form below to schedule your FREE inspection. Our specialists can evaluate your floor system, crawl space, and foundation to determine what is causing the movement and recommend a solution designed to stabilize your home.
Why Are My Floorboards Sinking?
Your flooring is only the surface of a larger structural system. Beneath hardwood, carpet, laminate, or other finished flooring are the subfloor, floor joists, beams, and supports responsible for carrying the weight of the floor and everything above it.
When one or more of these components begin to weaken or shift, the floor above can start to sag.
Several conditions can contribute to the problem.
Inadequate Support Beneath the Floor
Floor joists and beams require proper support to carry the weight of your home. If supports are spaced too far apart, begin to settle, or were improperly installed, portions of the floor system can gradually sag.
Over time, homeowners may notice low spots, sloping floors, or a visible dip toward the center of a room.
Crawl Space Moisture
Excessive moisture in a crawl space can create an unhealthy environment for wooden structural components.
High humidity and persistent moisture can contribute to wood rot and deterioration. As floor joists or beams lose strength, they may begin to bend or sag under the weight they were designed to support.
Moisture can also contribute to musty odors and other crawl space problems, making it important to address both structural and moisture-related issues when necessary.
Settling Supports
The columns or supports underneath a floor system rely on the ground beneath them. If that soil settles or shifts, the support can move with it.
Once a support drops, the beam and floor joists above it may also begin to sag. This can result in floorboards sinking in a specific room or across a larger section of the home.
Aging or Damaged Floor Joists
Wooden floor joists can weaken because of age, prolonged moisture exposure, previous modifications, or other damage. A weakened joist may bow downward instead of maintaining the level surface needed to support the floor above.
Signs Your Sagging Floor May Be a Structural Problem
A slightly uneven floor in an older home does not automatically mean there is a serious structural issue. However, certain symptoms should be investigated.
Watch for:
- Floors that feel soft or bouncy when you walk
- Visible dips or low spots
- Floors sloping toward the center of a room
- Gaps developing between flooring and baseboards
- Cracks appearing in interior drywall
- Doors that stick or no longer close correctly
- Furniture that appears noticeably unlevel
- Sagging or damaged floor joists in the crawl space
If several of these symptoms appear together, the issue may involve the support system underneath the floor rather than the finished flooring.
Why Replacing the Flooring Won’t Fix the Problem
New flooring can improve the appearance of a room, but it cannot repair an unstable structure underneath it.
For example, installing new hardwood over a sagging subfloor does not strengthen weakened joists or correct a settling support. The new flooring may eventually begin to show the same unevenness.
Before making cosmetic improvements, it is important to determine why the floor is moving.
How Does TFS Repair Sinking and Sagging Floors?
When floorboards sinking is related to inadequate support underneath the home, TFS can evaluate the floor system and determine whether additional structural support is needed.
One solution TFS offers is the SmartJack® Crawl Space Stabilizer.
SmartJack® Support Systems
SmartJack® systems are designed to provide supplemental support for sagging floor joists and beams.
During installation, the affected areas of the floor system are evaluated to determine where additional support is required. A stable base is prepared underneath each support location, and steel columns are positioned beneath the appropriate beams.
The system can then be adjusted to provide support to the floor structure. In some situations, an attempt can be made to improve the floor’s position, although the primary goal is to stabilize the structure and help prevent further movement.
Unlike temporary wooden posts or improvised supports, SmartJack® systems are engineered specifically for crawl space structural support.
What If Moisture Is Contributing to the Problem?
Structural stabilization may only be part of the solution if the crawl space is consistently damp.
TFS can also evaluate moisture conditions and recommend crawl space solutions when appropriate. Crawl space encapsulation helps isolate the area from ground moisture, while a properly sized dehumidifier can help control humidity.
Addressing moisture can help create a drier environment and protect wooden floor components from continued exposure to excessive humidity.
It is important to note that TFS does not perform mold removal. If mold is present, it must be properly remediated before an encapsulation system is installed.
Don’t Ignore Changes in Your Floors
Changes in your floors can provide valuable clues about what is happening underneath your home. Floorboards sinking, bouncy areas, sloping surfaces, or gaps around walls and baseboards may indicate weakened joists, settling supports, crawl space moisture, or insufficient structural support. TFS can inspect the area beneath your home and determine whether solutions such as SmartJack® stabilization or crawl space moisture control are appropriate. Call TFS – The Foundation Specialists or fill out the form below to schedule your FREE inspection today and get a professional evaluation of your home’s floor support system before the problem has an opportunity to progress.
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