By Scott Ward, NPI Franchise Owner, Southern Johnson County, Kansas
Spring is a great time to grade the grading of your house. Give yourself an “A” if the soil around your foundation is sloped away from the house at least 6 inches in the first 10 feet, with 3 to 4 inches in the first 5 feet on all sides.
Give yourself a “B” if you have any low spots at all around the foundation. These low spots many times are near inside foundation corners and near where utilities enter the house. Make sure to look under bushes and other landscaping, too.
Give yourself a “C” if the grading is at or near level around a significant portion of the foundation. If you have a yard that slopes toward the house and water pools at or near the foundation with wet, spongy ground in the vicinity of the foundation, give yourself a “D.” If you have moisture in your basement or crawl space, especially during rainstorms, and water stains on the interior side of the foundation walls, then you get an “F.”
Any time excess moisture is present around a foundation, the potential for foundation problems increases. The water itself creates what is called hydraulic pressure, which presses the foundation walls inward and can lead to cracks, settlement and shifting of the foundation. If left unchecked, this can ultimately cause structural failure and cost many thousands of dollars to repair. If you live in area with expansive soils, such as the Midwest, the effects tend to happen much faster. Ongoing moisture issues can also lead to mold, insect infestation and rot within the structure — all of which are expensive to repair.
In many cases, the proper grade can be achieved by simply adding soil around the foundation to slope the grade away from the house. Forty-pound bags of topsoil can be purchased at home improvement centers for about $1.50 for small projects, or you can have a truck load of topsoil delivered. Be advised that both soils are pulverized and will settle and compact a significant amount, so be sure to by extra. On large jobs or jobs that require extensive regrading, it may be best to hire professional. In the long run, this will be less expensive than repairing a foundation.
Remember to leave at least 2 to 3 inches of space between the soil and the top of the foundation or the bottom of the siding. This will prevent moisture from wicking into the siding and help limit insects from entering the structure. Adding downspout extensions and/or splash blocks is also a good idea to help move water away from the foundation. If you have a sump pump, make sure that it, too, is discharged well away from the foundation.