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Sagging Floors

Your floors should be sturdy and capable of supporting your home’s structure. They should not sag or dip when you walk across them.

Sagging floors are more than just an eyesore. They indicate structural issues that require professional solutions to prevent further damage.

This common but hazardous problem is often linked to your crawl space. When concerns like moisture and pests in your crawl space begin to impact your living space, it’s time to take action.

Bay Area Underpinning understands the concerns of homeowners facing sagging floors and offers comprehensive crawl space repair solutions to address these issues effectively. Our SettleStop™ IntelliJack™ Crawl Space Jacks provide lasting support for your floor joists and floors, putting your home on solid ground again.

This page guides you through the causes and problem signs associated with sagging floors, why it’s essential to fix them, and how Bay Area Underpinning can help.

What Are Sagging Floors?

Sagging floors slope, slant, or dip downward between the walls or beams that support them. They may feel springy, bouncy, or like they are about to give way when you walk across them.

This occurs when the floor joists underneath the subfloor bend or twist under the weight they are supporting, indicating the structural integrity of your home is compromised.

Sagging floors can lead to issues such as creaking noises, tripping hazards, rattling furniture, and an unpleasant visual appearance.

Additional warning signs of sagging floors include:

In extreme cases, sagging floors can detach entirely from the supporting wall or beam. Sagging floors indicate serious underlying problems that will only worsen over time if not addressed, making professional intervention vital at early signs of damage.

What Causes Sagging Floors?

There are several causes of sagging floors:

  • Water: When there is excessive moisture or water leaks in the crawl space, wood absorbs the water like a sponge. This leads to wood rot, warping, cracking, bending, and deterioration.
  • Pests: Infestations from wood-boring insects like termites damage the floor joists and subfloor from below.
  • Floor Joist Issues: Over spanned floor joists that are too far apart cannot adequately support the floor.
  • Poor installation: Improperly nailed or designed floor joists can lead to sagging.
  • Foundation Damage: Foundation shifting or settling beneath the floor joists can cause misalignment.
  • Wear and Tear: Age and degradation of floor components over the years can contribute to floor issues.

Identifying and promptly addressing the root causes of sagging floors with professional assistance is crucial to tackling the problem effectively.

Can You Fix Sagging Floors?

Yes, sagging floors can be fixed. However, it requires professional expertise and high-quality materials to do the job right.

DIY fixes like sistering new boards or adding temporary jacks often fail to solve the underlying problems. Venturing into your crawl space can also be hazardous, and something best left to the pros with the proper protective gear and expertise. 

Addressing sagging floors properly with a whole-home solution is crucial for lasting results. At Bay Area Underpinning, we offer specialized solutions to address sagging floors effectively, preventing continued issues and ensuring your home remains safe and stable.

How We Fix Sagging Floors

To properly fix sagging floors, here is what’s involved:

  • Thorough professional crawl space evaluation.
  • Inspectors determine the causes of damage and propose appropriate solutions.
  • Reinforce floors with IntelliJack™ Crawl Space Jacks.
  • Customize jacks to the specific crawl space height.
  • Adjust the jacks to the proper height.

Our proprietary IntelliJack™ Crawl Space Jacks provide robust support for sagging floor joists. With an impressive allowable load capacity of more than 24,000 lbs. per support jack, our system meets the highest industry standards, ensuring the structural integrity of your home. Crawl space jacks can be periodically adjusted by our team to potentially raise your floors to their original level.

At Bay Area Underpinning, our products are engineered to outperform basic post jacks you can buy at your local home store. We focus on addressing the root causes, not just masking the visible symptoms. Our holistic approach ensures your home’s foundation is stabilized for the long haul.

Why Address Sagging Floors Now

There are important reasons you should address sagging floors immediately:

  • Prevent Further Damage: Timely intervention can halt the progression of floor sagging and prevent additional problems throughout your home, including wall or ceiling cracks and sticking windows and doors.
  • Avoid Costly Repairs: It becomes more complicated and expensive to fix if unaddressed. Complete floor and subfloor replacement may become necessary.
  • Improve Safety: Eliminate tripping hazards and ensure the safety of your family and visitors.
  • Enhance Property Value: A structurally sound home maintains its value and curb appeal, preserving your investment.

Take a proactive approach and contact the professionals at Bay Area Underpinning today. Our proprietary solutions stabilize your home’s foundation and can return your floors to solid, level surfaces that feel secure underfoot. Invest now to protect your most valuable asset—your home.

Contact Bay Area Underpinning for Reliable Sagging Floor Solutions

If you observe the signs of sagging floors in your home, don’t delay repairing them. Trust Bay Area Underpinning for expert solutions.

Our expert team takes a comprehensive approach to fully stabilize your floors by determining the root causes of the issue, not just the visible symptoms. Our proprietary crawl space jacks and integrated services deliver lasting support right where you need it. We’ll also guide you through the repair process every step of the way. Contact us today to schedule a free inspection and estimate. 


The method of repair depends on the extent of the damage to crawl space floor joists and floors. However, sagging floors can be fixed with proper reinforcement, such as Bay Area Underpinning’s proprietary IntelliJack™ Crawl Space Jacks. Our professionals will determine the cause of damage and the best repair during a free crawl space inspection.

The timeline depends on the extent of the damage and necessary repairs, but Bay Area Underpinning’s professionals work efficiently to restore your floors and minimize disruption to your daily life. Most repairs can be completed within a day or two. Contact us for a free inspection, no-obligation estimate, and an accurate project timeline.

The cost varies depending on the severity of the damage, the size of the installation area, and the chosen solution. Bay Area Underpinning’s experts will provide a detailed estimate during a free inspection, as well as information on various financing options.

Our Locations


2333 Courage Dr. Suite C
Fairfield, CA 94533

San Jose

1161 N Fair Oaks Ave
Sunnyvale, CA 94089