The easiest way to deal with lawn drainage problems is to slope all land, patios, walkways, etc. away from your house. The minimum slope that I work with is two percent, or ¼ inch per foot. As an example, the grade at a spot four feet away from your house should be one inch lower than the grade at the house. This will assure that water will be directed away from the building. This requires regarding if your land slopes towards your house. Please call us today and well come out for a free estimate and assist with your lawn drainage needs.