Any crack in your foundation is never a good thing. However, not all foundation cracks are equal. Some are structural caused by settlement issues in the soil while others are simply the culprit to your wet basement.
The sad truth is: Concrete can't help but crack. It naturally expands and shrinks with the change in the elements. The soil around the wall is going through the same expanding and shrinking process with the weather-shrinking in droughts and expanding in floods. Tree roots, hydrostatic pressure, erosion, and settlement, can all cause cracks in foundation walls.
Foundation repair contractors learn to diagnose concrete foundation cracks to determine what is truly causing the cracks and the severity of the problem.
Let's start with the basics: Horizontal or vertical?
Generally horizontal cracks are structural cracks usually caused from pressure building up on the opposite side of the wall from either an improper backfill or hydrostatic pressure. It could also be from cold climates with extreme freeze and thaw cycles.
For these types of structural cracks in poured foundation walls, it is best to use low-pressure crack injection. Epoxy seals the crack and because epoxy doesn't flex like polyurethane, it is the first step to stopping the crack's future movement. It is important to know, epoxy by itself will not prevent further cracking. You will need to add more reinforcement such as carbon fiber staples, or other structural products to reinforce the crack.
Simply filling the structural cracks with epoxy will not fix the problem if the wall continues to move. Added reinforcement to the foundation (whether interior or exterior anchors, carbon fiber, or beam systems) will work to stabilize the wall to prevent movement. Such reinforcement in conjunction with crack injection will ensure that the original crack does not reopen while minimizing the potential for further re-cracking in the same area.
Vertical cracks are generally non-structural cracks. They usually are seen with multiple cracks in one or more area along the basement wall. Vertical foundation cracks are often the least threat to the building. They are usually caused by the natural expansion and contraction of concrete. Through the years' freeze-thaw cycles, the concrete expands and contracts causing the concrete to crack.
When these vertical cracks are straight or slightly wandering and generally even in thickness, the risk is fairly low as far as affecting the structural integrity of the house. Nonstructural cracks can bring on another set of problems with water intrusion, soil gases, insects and other pests. Either polyurethane foams or epoxies are effective in sealing such cracks.
Cracks in Block Walls
Cracks in masonry blocks have to be handled differently from cracks in poured foundations and they trigger different problems and risks. If you have cracks in masonry blocks it usually signifies thermal movement or differential settlement. If there is an even crack through a masonry block wall either in the mortar joints or through the blocks, it is usually caused by shrinkage or thermal exposure. With these types of masonry cracks, the risk of the wall collapsing is low.
The risk increases if you see stepped in brick especially near the ends of the wall. It is especially dangerous if the wall bond courses are broken. If you see a crack that is wider at the bottom than at the top in your block wall there may be a serious risk of collapse.
If the masonry wall is bowing, then you should look into a foundation repair system or a masonry contractor who will rebuild and reinforce the wall.
Get the Whole Picture
While the cracks themselves can tell you a lot about what is truly causing the problem, there may be more to the story. If you have water in the basement, you have to inspect the foundation inside and out to determine the reason for the water. If you don't go outside you may miss the grade sloping toward the house instead of away from it, or the puddle where the gutter dumps water when it rains.
Construction work slows traffic to a crawl! Oh no, not again! You may not even spend half an hour thumbing through the newspapers in the morning but often you have come across such news that traffic came to a halt due to ongoing construction work. A few years back it was a common phenomenon and even you must have suffered and got delayed for an appointment due to piling and construction activities on the road. But thanks to the constant up-gradation of technology now they will be the thing of the past.
But first let me tell you about Piling. For any building, house or concrete structure to be built well you must require an extremely strong foundation and underground structural base that supports the building. To set a deep foundation for buildings and other structures piling is exceedingly important. Piling is considered as a precondition for any construction project needed to provide a strong support to the structure at the foundation level.
The conventional method of piling comprises of a heavy weight placed between guides so that it can freely slide up and down in a single line. They are placed upon the pile of wood, concrete or steel and weight is increased with the use of hydraulics, steam, diesel, or manual labor. When the weight reaches its highest point it is then released and smashed on the pile so that it can be driven into the ground.
Nowadays hydraulic pile driver is preferred over other methods as they are environment friendly, vibration free and generate negligible noise and pollutants. They enable greater press-in and extraction force to be used as more reaction force is developed in the process.
Earlier noise and vibration generated during piling work caused much inconvenience especially in environmentally sensitive areas, such as town, hospitals and schools. There was a growing demand for silent, vibration free, sheet pile installation. Hydraulic pile driving system operates swiftly, silently and completely without any vibration enabling contractors to work with confidence even in the most demanding locations day or night.
Once you suspect or detect home foundation damage, you must immediately contact a reputed home foundation repair contractor for your home foundation inspection and repairs. The home foundation repair contractors will assess the extent of foundation damage after initial inspection and will determine the method of repair and time period needed to carry out the repairs. They will provide you the repair estimate after taking into account several factors such as labor cost, type of material to be used, cost of materials, number of man days etc.