What Is Foundation Excavation?
Foundation excavation is the process of removing earth and rocks from an area designated for the base of a new structure.
Excavation allows the footings to be poured into dirt that is deeper than the top layer.
This adds protection from various elements, including earth and rocks that shift over the years.
Read on to find out more about this important process!
How Long Does It Take?
The length of time required is based on the size of what is being constructed.
While some can be dug in a few days, others may take weeks.
Allowing for proper digging ensures the job will be done correctly without overlooking important steps.
How Deep Should A Foundation Be?
The depth is another element that will depend on what is being built. Single-story homes and homes without a cellar will have a much shallower foundation.
Multi-story houses and larger structures require deeper trenches and larger foundations as they will carry more weight.
Codes generally call for foundations to be poured below the frost line so that they are not affected by the freezing and thawing of the earth in cold months.
As the trenches being dug get deeper it is common for the dirt to need reinforcement to prevent it from backfilling before a footing is poured.
Digging Foundations The Right Way
Here is our digging process from start to finish:
A critical part of any excavation project, surveying determines where everything will be built which helps us know where to begin for building foundations.
It also helps determine materials that are needed if the soil is not adequate for supporting the foundation or structure.
Clay is a common material that will have to be removed if it is discovered.
The next step is the actual excavation. How excavation is carried out depends on numerous factors:
- The depth of the foundation and the trenches required
- The type of dirt to be excavated
- The drainage properties of the land
- Whether there will be a basement or crawlspace
Open Hole Inspection
Once the excavation is complete, the site is revisited and inspected. A certified professional checks the soil again to make sure that it matches the first report.
When the requirements and test results are accepted, the process of pouring the concrete footings begins. Once this has been set and impact-tested for hardness then it is alright to build a foundation.
A Fully Supported Foundation
While concrete itself is designed to be strong and provide support in many applications, there are some factors that will affect its ability to hold the structure’s weight over the years.
Keeping Moisture Out
Water can cause damage to wood causing mold, rot, or mildew.
Insulating From The Cold
A concrete foundation acts as an insulation barrier that stops the cold earth from drawing the heat from the structure.
This is especially important in areas with colder climates as this affects the energy efficiency of a home.
Building a foundation that is poured too shallow or with inferior materials will may not adequately insulate from the cold.
Protecting Against Ground Movement
It is important to note that ground movement is not limited to earthquakes. The earth is constantly settling and there are natural events that can further affect this.
Underground water plays a large roll in the settling of the earth as well as larger events like landslides, and floods. A foundation should be able to withstand any regular disturbance that would otherwise cause the house to become unstable.
Leave a comment below or ask any questions you have on how to prepare the best foundation for your job.