Foundation Waterproofing Practices - Building A Foundation Slope

12 January 2016
 Categories: , Blog


If you have a problem with rainwater entering your home through the foundation, then you should consider hiring a concrete contractor who can place sealing paint, basement drains, and concrete patches along the foundation to reduce leak concerns. While this will help to prevent water from entering the home, you should also do a few things in addition to make sure that water is pulled away from the foundation on the exterior of your house. Building a slope is one of these things. Keep reading to learn about how a slope can be built to help water drain away from your home's foundation.

Considering Slope Angle

Earth that becomes drenched by water will often compact, especially when the water has nowhere to drain when it reaches the edge of your foundation. A small trench can form and allow moisture to continue sitting against the home. When this happens, water is much more likely to find its way into your house, regardless of waterproofing techniques. To solve this problem, make sure that the edge of the earth that sits closest to your home is built into a slope to draw water away from the foundation. 

A proper slope can be built with the placement of crushed stone and soil at an angle away from the home. For good drainage, you want the slope to drop around one inch every five feet. This is consistent with a 2% slope that will help to reduce erosion concerns across the slope once the installation is complete. To make sure there is a big enough slope, think about extending the formation around 10 feet out from the side of the foundation. You do have the option of allowing the slope to drop two or three inches every five feet, but you will likely need to rebuild the slope every few years.

Creating The Slope

Once you have considered the slope angle, purchase enough crushed stone to build a one or two inch formation of rocks along the entire foundation. Think about going with crushed stone #3 that is between one-half inch and two inches in diameter, since this type of rock is typically used for drainage projects. Use a rake to create your slope by thinning the rock layer as you move outward. Use a measuring tape or a ruler to make sure that the rock formation slopes downward two inches over the 10 foot area.

Afterwards, place a thin one or two inch layer of topsoil over the rocks. Consider planting grass seed over the soil. The grass will help to absorb some of the moisture that comes to the foundation. For the best results, think about opting for a type of grass that requires a good deal of moisture to grow properly. Bahia, ryegrass, and bluegrass grasses are all good choices for wet areas. 

For foundation waterproofing services, contact a company such as Champion Waterproofing.