Some common causes are.
Concrete slab water leakage.
If your foundation lacks insulation is too porous or has cracks moisture can then be introduced into the slab and water will appear in the basement.
A broken pipe beneath the foundation excess groundwater from rain runoff not properly managed rising water table.
When this issue manifests itself the water pressure may become unsatisfactory and the flooring may turn soggy.
Look for pools of water.
Check for leaky appliances.
If the gutters are too close to a home s walls the accumulated water can lead to the deterioration of the concrete wall.
Moreover keep an eye out for damp carpets and gaping walls which are also strong indications.
A slab leak happens when the concrete slab has cracked in places due to water damage.
A water leak under the floor can easily develop into a costly and inconvenient endeavour.
Watch out for a major water bill spike.
The blame can be placed on faulty plumbing below the slab.
A hole cut through the slab to gain access to the leaking water pipe.
Another leakage factor comes from the water collected by gutters.
The grid you see is the steel reinforcement inside the concrete a hole is cut through the slab from inside the house.
Jack hammers break away the concrete and soil is set aside.
In most cases the first indication that your underground pipes are leaking.
Some water bill spikes are caused by leaky appliances especially toilets so check them.