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Unlike homes with basements or crawl spaces, a slab floor is solid concrete with no structural wood flooring system. For homes with this type of floor, soft soil or bad compaction is almost always the culprit. Once the soil is compromised, the slab will shift, and this creates the sagging or sinking effect. Pressure from that shift will sometimes crack the slab itself, causing high and low places in the flooring. To fix this type of damage, you need concrete slab repairs.
Water is a probable suspect, as it seeps into the ground around your foundation. The sill plate, wood beams, and floor joists are all vulnerable to this; these wooden components on top of your foundation are the wood framing system that supports your floor. Because it has direct contact with the concrete and can be over the exposed soil line, it often falls victim to water intrusion. Once water intrudes and saturates the wood, this leads to deterioration. It’s this deterioration that causes the floor system to fail.

But you don’t have to have standing water under your house to cause structural decay. High humidity can also damage the beams and joists that hold up your subfloor. Wood is highly porous and readily absorbs water from the air. Over time, this water saturation softens and rots the boards. As they decay, they compress under the weight of your home, lowering your floor sometimes by several inches.

Lack of building codes- or outdated ones- are another concern. A main support beam, the post that spans the length of your home, should be sized proportionately and supported every few feet. In many homes, the beams may not be the correct size or the support posts are installed too far apart. This over-spanning puts greater stress on the beam and makes it more likely to sag and potentially even fail.
Along the same lines, if your home is more than 50 years old, it’s also possible that inadequate materials are to blame. When a home is built, sometimes the beams or joists are not the correct dimensions. When this happens, a contractor will install a shim; a shim is a thin piece that adds a minimal lift to ‘even out’ the installation. Many times in construction, that shim was usually another piece of wood; at Acculevel we use steel shims to prevent compression or rot. These shims also allow us to increase the overall surface of the bearing load, so that the beam it’s supporting is not crushed by the weight of your home.
Technology is another age-related factor. New solutions and materials are always in development, but they take time to become commonplace. Before the 1970s, pretreated or pressure-treated lumber was not widely available or regularly used by builders. Lumber installed in its original ‘raw’ form is more vulnerable to insects and water damage.
New trends in home design can have a negative effect if a remodel doesn’t take the weight of the raw materials into account. Many older homes aren’t built to carry the load of solid granite countertops or stone-tiled floors and walls. Recreational items like a pool table or hot tub will also add significant weight to your floor system. These are all items that can put additional stress onto an already failing wood structure.
Contact Acculevel! We provide free estimates on sagging floor repairs.
Recently completed a crawl space waterproofing project for Scott in the 49202 area. We installed a vapor barrier system to prevent water intrusion, addressing the issues efficiently. The project ensures a moisture-free environment for the crawl space and included additional support for any potential stone foundation, completed at an approximate cost of $23,600.
Near Jackson, MI
Our team tackled a basement wall project to address bowing and cracking issues in Cheryl’s rental property located in the 49203 area. The job involved reinforcing the cinder block walls to stabilize the structure and prevent further damage. The approximate cost for this structural repair was $8,614, ensuring the long-term integrity of the property.
Near Jackson, MI
A waterproofing project was completed for a split-level house experiencing water intrusion on the lowest level. Addressing issues believed to stem from foundation problems, our team worked on the exterior walls to prevent further leaks. This important job, carried out for Anthony, ensured a more secure home environment, costing around $8,050. Located in the 49203 area, this project protects both the homeowners and their renters from potential water damage.
Near Jackson, MI
We addressed ongoing water issues in Barbara's basement (49203) by installing a new waterproofing system compatible with existing structures. Previous solutions were not properly integrated, leading to persistent water problems. Our approach ensured a dry and functional space, with the overall project priced at about $12,300.
Near Jackson, MI
We recently tackled a challenging project addressing water intrusion under a deck area. Our team reinforced the structure, repaired damaged wood, and applied effective waterproofing solutions around critical entry points. This ensures long-term stability and prevents further moisture issues in the basement. The project was completed with precision and attention to detail, safeguarding the home for the future.
Near Jackson, MI
We've completed a waterproofing job for Melinda in the 49201 area. This project involved addressing water intrusion issues where the basement floor meets the walls, ensuring a drier environment. The installation was extensive and handled at an approximate cost of $8,500. We aimed to enhance the basement's protection against future water damage.
Near Jackson, MI
Addressed structural concerns in Zach's basement, ensuring a solid and stable foundation for the long term. This waterproofing and reinforcement project was completed efficiently to handle moisture issues and enhance support, at an approximate cost of $47,580.
Near Jackson, MI
Recently addressed a vertical crack in Jaimie's basement foundation, located next to the driveway, in the 49202 area. The previous repair attempt was insufficient as water intrusion persisted during heavy rains. Our team implemented a more robust solution to prevent future leaks, ensuring the basement stays dry. This reliable foundation repair was carried out for an approximate cost of $2,800.
Near Jackson, MI
We finalized a structural repair project for Don in zip code 49203. The job involved addressing foundational concerns which included reinforcing a wall for added stability. This crucial repair helps ensure the longevity and safety of the structure. The project was completed for an approximate cost of $1,715.
Near Jackson, MI


