If your home is built on sidewalk space and sinks in the middle rather than outside, you may be able to fix it yourself. If your house is on a slab, or if you are in a low space and you are settling around the perimeter, you absolutely need a professional foundation repair contractor. Variations in humidity cause soil components to swell or shrink, causing movement below the foundation. As for what could be wrong with a cracked base, each type of base material has its own common problems, according to Welmoed Sisson, a home inspector, author of 101 Things You Don't Want in Your Home and co-owner of Inspections by Bob.
The only way to really stop your foundation from settling is to install a deep foundation system, such as steel thrust pillars or helical pillars. If a broken water pipe, clogged gutter, or drainage problem in your yard sent enough water cascading along a perimeter base to undermine an area, a contractor could prop up the area with more concrete or shim the sill plate to re-level the area. Keeping the gutters clear and making sure the downspouts are away from the house can also keep the base dry. Additional factors contributing to foundation failure in Texas include poor drainage around homes and corrosion of cast iron pipes or failure of cedar docks under older homes.
Its base literally supports the weight of your entire home, so it's important to make sure it's structurally sound. To ensure that the home you want to buy is structurally sound, have it evaluated by a foundation contractor or engineer. However, this epoxy is not exactly the same as the practical two-part epoxy used for crafts and other household repairs. If you have to deal with a crack like this, don't finish the basement before doing the repair.
Not surprisingly, many of the best ways to avoid foundation cracks involve keeping water away from the house. For larger problems, especially those encountered in changing foundations of commercial and domestic buildings, hydraulic pillars are generally used to lift and stabilize foundations. This drain may become blocked, causing water to build up in the ground and putting pressure on foundation walls. Many do-it-yourself foundation repair methods, such as adding more concrete, inserting wooden wedges, etc., only treat the symptom of foundation settlement, not the cause.
Professional foundation repair companies know what not to do because of years of experience (and, honestly, some very costly mistakes). Repairing a crack in the base in this width range is a simple DIY project that involves filling the crack with a putty that is compatible with concrete, such as Dap concrete and mortar sealant.