Underpinning Slab Foundations New Haven, CT
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Underpinning can be done in one of two ways: one, improve the foundation system by enlarging the existing foundations or adding new foundations, and two, to improve the properties of the soil below the foundations without touching the building at all.
Pyrrhotite causes the slow deterioration of the concrete when exposed to oxygen and water. Pyrrhotite is a sulfur stone found mainly in the New-Haven region and reacts strongly to moisture, air, and oxygen. This highly harmful particulate oxidation reaction causes expansion in concrete, causing large cracks in foundations and other concrete structures. Sometimes, the chemical reaction of pyrite is so fast and important that in certain situations there is a risk that the base will collapse in a short time.
A rust color remains or white powder may appear. The sheetrock walls of a finished basement may need to be separate to examine the concrete. The damage is irreversible at this stage you need an experienced team of Underpinning Slab Foundations to solve this problem.
Why is Underpinning Necessary?
There is a variety of reasons why underpinning might need to be carried out. These are usually related to subsidence issues. Some examples of why underpinning might be necessary are:
- A change in soil conditions under the foundation.
- Soil characteristics were not properly taken into account during the design phase.
- The original foundation is no longer suitable/strong enough.
- The construction/repair/excavation of neighboring structures endangers the current foundations.
- Additional floors are to be constructed underground