A stone foundation is a basement wall that has been constructed out of rock-sized pieces of limestone, or other types of stone, which have been cemented together. Typically, they have dirt floors, although previous homeowners may have paved the floors over the centuries. Many homes built before World War One have this type of foundation. You’ll also find this type of foundation in rural homes and houses that may have been used as summer getaways or cottages.
The original intent of this type of basement was to hold the house’s mechanical system and prevent your home from shifting due to frost heaving. Originally a stone foundation was a spot where you could plant your furnace, as well as plumbing pipes, electrical wires and a water heater.
The original builders may have accounted for leakage or a small amount of flooding by putting your furnace on a raised concrete slab. Rarely will you find any weeping tile outside the foundation, making the basement further prone to leakage.