Strip foundations are commonly utilized in low-rise household construction, such as home construction or house additions. Strip foundations are employed when the soil is strong enough to sustain the building being built. The foundation consists of an exterior wall made up of concrete blocks or poured concrete. A shallow ditch is excavated next to the outside of the foundation wall and filled with gravel or crushed rock. This provides extra support for the wall while keeping the ground away from the house's interior walls. The depth of the strip foundation depends on how much height you want to add to your house. For example, if you were to build a one-story addition onto a two-story house, the new floor level would be on top of the old foundation. The depth of the new foundation would need to be sufficient to support both the new floor and any additional floors that might be added in the future. The main advantage of using a strip foundation is that it keeps the ground surface far away from the house's interior walls. This makes it easier to install heating and cooling systems in homes that use gas or oil for their hot water heaters and furnaces. It also reduces the risk of damage occurring due to moisture accumulation in the walls from wet soils. Finally, strip foundations are less expensive than solid footings because they do not require deep excavation.