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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Lack of building codes- or outdated ones- are another concern.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.
Resolved a critical issue with a structural beam in a crawl space. The home had been suffering from sinking due to condensation damage on the central beam. Our team installed new support beams, reinforcing the structure to prevent further sinking. This repair job, costing approximately $12,000, ensures the stability and safety of the home.
Near Richmond, KY
We addressed a critical issue with a home's foundation where a central beam was damaged due to condensation, causing the house to sink slightly. Our repair involved reinforcing this beam to prevent further structural issues. This necessary intervention was priced around $12,000, providing stability to the home for Evan in zip code 40475.
Near Richmond, KY
Heather's home was experiencing significant structural issues with visible cracks in the walls and a sagging structure, particularly on both sides. The inspection revealed a combination of crawl space and basement concerns. Our team installed adjustable jacks to stabilize the structure and address the sagging. Additionally, foundation cracks were repaired to prevent further damage. This essential repair service was completed for approximately $10,000, ensuring the long-term stability and safety of the home in zip code 40475.
Near Richmond, KY
We successfully completed a slab leveling job for a front porch that had settled over time due to uncompacted soil. The porch was previously 3-1/2 inches low in the front, and our team effectively stabilized it over a span of 3 feet. Bill can now enjoy a safe and even porch, with the project costing around $2000.
Near Richmond, KY
Recently completed a waterproofing project in Jonathan's walkout basement with a monoslab foundation and cinderblock walls. Addressed water entry through a cove joint and noted a slight bow in one wall. The team also tackled a spot of mold and some nail pops in doors. The project, critical for ensuring a dry and stable basement, was valued at approximately $22,800.
Near Richmond, KY
A successful waterproofing job was carried out in Daniel's crawl space, involving the installation of a dehumidifier, sump pump, and inspection of the vapor barrier. These efforts ensure effective moisture control, keeping the area dry and structurally safe. The perimeter drainage was also extended to keep the foundation dry. This comprehensive project was valued at roughly $20,215, providing lasting protection against water damage.
Near Richmond, KY
Completed a thorough waterproofing project in Daniel's crawl space, including the installation of a sump pump, dehumidifier, and inspection of the vapor barrier. This ensures the area remains dry and protected from moisture issues. The project was valued at around $20,200, providing long-term durability and peace of mind.
Near Richmond, KY
Completed a comprehensive waterproofing task for Deron's basement in zip code 40475. Our team ensured the cinder block walls were sealed effectively, addressing potential water intrusion issues. This extensive sealing project, priced around $15,300, aims to protect the space from future moisture problems, providing lasting peace of mind.
Near Richmond, KY
Completed a significant waterproofing project in Clifford's basement in Richmond, addressing issues with water intrusion due to heavy rain. Our team installed a robust drainage system to manage and redirect water effectively, helping to keep the area dry and secure. This project was roughly priced at $22,210, providing long-lasting protection against future water problems.
Near Richmond, KY


