Q.: Our home is 2.5 years old, and the basement slab is constantly wet. Water is moving from the subgrade through the concrete. We did a pH test on the moisture, and it has a considerable acid content. The carpet, which was glued to the concrete, has come loose. What can we do about this problem?
A.: There is little you can do with the floor slab to prevent water from migrating through the concrete. There is too much water in the subgrade, and that condition can be changed only with adequate drainage, either with a good foundation drainage system or sump pumps inside the house. The fact that the water coming through the slab has a low pH would indicate ground water conditions and would have nothing to do with the concrete slab (which would normally have high alkalinity).