What Causes Sagging Floors?
Bad design, settling and crawl space moisture problems can all lead to uneven, sagging floors.
Floor Joist Design
If your support columns are spaced too far apart, you could end up with over spanned floor joists. The support columns are designed to provide support to the floor joists and stabilize your floors. If there isn’t enough support then the joists will become overloaded and begin to sag.
Settling Under Your Home
Weak soil can result in your support columns settling. As the column sinks it leaves a gap at the top, where it was supporting the floor joist. Because the support is no longer there, the floor joist will sag.
Crawl Space Moisture
Crawl space moisture not only creates the ideal environment for wood rot, it could also contribute to settlement. Wood rot occurs when there’s a lot of moisture or humidity present in your crawl space. The moisture softens and rots the wood, which ends up bending or collapsing under the weight of your home’s flooring.
If there’s extra moisture in your crawl space it’s not only being circulated into your home but is also being absorbed into the dirt floor. The ground softens as it absorbs the moisture and this also weakens the soil and it’s ability to support your home. This will result in the support columns sinking and settling.