Sinking & Sagging Floors Over Your Crawl Space

The two terms are often used interchangeably, but they can describe different types of movement. A floor may sag when joists or beams flex or lose support, while sinking can occur when columns, footings or the soil below them settle. An inspection can determine what part of the floor system is actually moving. 

Sagging floors don’t necessarily mean walking away from a home, but they do deserve a closer look. Before buying, have the cause and extent of the problem assessed. Understanding whether the home needs added structural support, floor joist repair, moisture control or more extensive work can help you make an informed decision. 

Sagging floor repair cost depends on the cause, extent of damage and repairs needed. Adding crawl space support jacks may cost something different than repairing rotted floor joists or addressing moisture problems. The Foundation Specialists offers free inspections in Nashville to determine the problem and provide recommended solutions and pricing. 

How long it takes depends on what’s causing the sagging and how much repair is needed. Installing structural supports like the SmartJack® system may go faster than a project involving extensive wood or subfloor repair, moisture control or multiple problem areas. After inspecting your crawl space, The Foundation Specialists can walk you through the recommended repairs and expected timeline. 

In some cases, crawl space support jacks can gradually raise sagging beams and floor joists toward a more level position while providing permanent support. How much correction is possible depends on the cause, severity and condition of the floor system. An inspection can determine whether lifting and leveling are appropriate for your home. 

Yes, sagging floors can often be fixed without replacing the whole floor. If the flooring and subfloor are still in good shape, the repair may center on the structure underneath. Depending on the cause, that could include adding crawl space support jacks or repairing damaged joists and beams. More widespread wood rot or damage may require some wood, subfloor or flooring replacement. 

Sagging floors are rarely just a cosmetic issue. They can indicate weakened floor joists, settling supports, wood rot or other problems with the structure beneath your floor. Even if the sag seems minor, it’s worth having the crawl space inspected to pinpoint the cause and whether structural repair is needed. 

Sagging floors can be caused by too much crawl space moisture, wood rot, inadequate support, settling columns or footings or termite and pest damage. Sometimes, more than one issue is involved. A crawl space inspection can determine what’s going on beneath the floor and what type of structural or moisture-control repair is needed.