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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Lack of building codes- or outdated ones- are another concern.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.
Addressed a bowing foundation wall in Joyce's garage, which had a concrete patio extending 12 feet from the wall. We reinforced the cinder block structure, ensuring stability and safety. The garage sits on a concrete slab, and our repairs were completed effectively for an approximate cost of $4,000.
Near 45255, Ci
We addressed a sinking slab issue on Diane's front porch in Union. The porch had settled but showed no cracking, making slabjacking an ideal solution. Our team ensured the porch was leveled to restore safety and aesthetics. The project is roughly valued at $2,000, according to initial expectations.
Near Union, KY
Addressed the void under Dan's porch and corrected the sinking sidewalk by about 3 inches. The slabjacking process ensured stability, restoring the area's original level. This project, priced around $2,000, resolved structural issues effectively, located in the 45241 zip code.
Near Cincinnati, OH
We recently completed a waterproofing job for Dalton in zip code 45211. The project involved addressing water intrusion issues by installing a new drain system in the basement. This preventive measure was necessary as the customer had just purchased the home and wanted to avoid future water damage. The approximate cost for this improvement was around $8,100.
Near Cincinnati, OH
Completed a waterproofing project in the basement of a church located in zip code 45242. The issue involved ground water seeping up along the walls, which was addressed with a comprehensive waterproofing solution. Rick, the client, can now rely on a drier and more secure basement space for approximately $10,700.
Near Montgomery, OH
Nichole's newly purchased home, built in 1908, required urgent attention to address sagging floors on the main level. Our team installed basement support jacks to provide the necessary structural reinforcement. This essential repair ensures a stable and level floor for years to come, with the project priced at approximately $12.3K in the 45205 area.
Near Cincinnati, OH
Addressed structural problems in Sandra’s home in West Chester (45069) caused by sticking doors and cracked walls on the main level. The repair focused on stabilizing these issues to ensure smooth door operation and intact walls. This vital project was completed for about $11K, providing much-needed structural integrity.
Near West Chester, OH
Took on a crawlspace project in Annamarie's home (45102) needing a complete waterproofing overhaul. The existing vapor barrier and insulation were inadequate, necessitating a thorough replacement to prevent moisture buildup. We also evaluated the need for a sump pump to enhance drainage and protect the foundation. This critical job was completed with an approximate cost in the $18.6K range, ensuring the crawlspace remains dry and secure.
Near Amelia, OH
We recently worked on reinforcing the structure of a basement room that's situated beneath a front porch for Judy in zip code 45219. The main concern was the pressure from the porch potentially compromising the integrity of the basement. Our team assessed and addressed the issue to alleviate stress on the bricks and prevent future problems. The solution helps ensure peace of mind for the homeowner, with the project costing about $23,000.
Near Cincinnati, OH


