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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Lack of building codes- or outdated ones- are another concern.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 slabjacking project on a concrete front porch in zip code 40031. The porch had settled unevenly, requiring stabilization to restore its level surface. The team efficiently lifted and leveled the porch, enhancing the home's curb appeal and ensuring safety, for an approximate cost of $1,600.
Near La Grange, KY
We tackled a high-moisture crawlspace issue for Joshua in zip code 40014. The crawlspace, with at least 18 inches of clearance, was struggling with damp conditions. Our team deployed an effective waterproofing strategy, enhancing the structure's durability. The cost of the project was approximately $15,000, offering a reliable long-term solution.
Near Crestwood, KY
In zip code 40071, we handled a project focusing on a sinking porch and adjacent walkway. The concrete slabs were dipping, presenting potential safety hazards. Our team applied slabjacking techniques to elevate and stabilize the area, ensuring a level and secure entryway for Sean. The overall cost for this repair was around $5,400.
Near Taylorsville, KY
Addressed significant leakage issues in Jon's basement, primarily around the sliding door and the junction where the foundation meets the floor. Our team implemented waterproofing solutions to prevent further water ingress, potentially stopping mold growth underneath the home. This comprehensive service was carried out in the 40223 area for an approximate cost of $3,000.
Near Louisville, KY
Handled foundation repair for Carissa in zip code 40068, addressing visible cracks in the cinder block structure. The crawl space was inspected to ensure overall stability and safety of the home. The job was completed for an approximate price of $4,275.
Near Smithfield, KY
Addressed crawlspace moisture issues at Andrew's property in zip code 40165. The project focused on waterproofing the crawlspace and managing insulation concerns, ensuring a dry and protected area beneath the home. This service was completed for an approximate cost of $3,200, providing much-needed moisture control.
Near Shepherdsville, KY
Visited Tina's property to address waterproofing needs within her crawlspace. Given her limited budget, our team focused on finding cost-effective solutions while maintaining quality. With a crawl entrance over 18 inches tall, we implemented measures to effectively prevent moisture intrusion. The project, completed for approximately $7,100, ensures the space remains dry and protected.
Near Mount Eden, KY
Recently, we completed a significant waterproofing project in Cindy's crawlspace area, located in the 40243 area. The goal was to address moisture issues and ensure long-term protection for her home. The crawlspace access was through the basement, and old insulation needed replacement due to deterioration. We installed a new system to prevent potential water intrusion effectively. The project's approximate cost was just over $9,000.
Near Louisville, KY
Installed a new sump pump for Chris in the 40299 area. This essential upgrade is designed to manage water effectively and prevent basement flooding, enhancing the home's foundational integrity. The service was completed with an investment of about $2,050.
Near Louisville, KY


