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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Lack of building codes- or outdated ones- are another concern.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.
We tackled a major waterproofing project in John's basement, addressing severe water intrusion issues exacerbated by previous poor renovations. The team installed a thorough barrier system to manage and prevent future water leaks, protecting the foundation and flooring from further damage. The work was critical following repeated floods, with the investment amounting to around $24,580.
Near Beech Grove, IN
Visited Todd's home in zip code 46107 to enhance the property's structural stability. We worked on improving the sidewalk and drainage system alongside the house to prevent water accumulation and potential foundation issues. This essential repair helps ensure the long-term integrity of the home's foundation, completed at an approximate cost of $6,500.
Near Beech Grove, IN
Elbert had water seeping into his basement during heavy rains, needing an inside waterproofing solution. Our team addressed the issue by implementing measures to stop water intrusion where the walls meet the floor. This essential work, approximately priced at $17,800, ensures Elbert's basement stays dry and protected from further damage.
Near Beech Grove, IN
Conducted a detailed assessment of foundation settling issues at David's residence in zip code 46107. Noted measurements indicating the degree of sloping and sinking affecting the structure. The foundation, a mix of poured and block, required precise evaluation to formulate a repair approach. Estimated repair pricing is approximately $13,400, addressing essential structural stabilization.
Near Beech Grove, IN


