A Properly Graded Driveway

A correctly graded driveway is essential for proper drainage and preventing water damage to both your driveway and home's foundation. The key is ensuring water flows away from your house and doesn't pool anywhere on the surface.

To check the basic grade, observe your driveway during or immediately after rainfall. Water should flow steadily toward the street or designated drainage areas without pooling. If you notice standing water, this indicates low spots that need attention.

For a more precise assessment, use a carpenter's level and a long straight board (at least 8 feet). Place the board on the driveway and put the level on top. The bubble in the level should indicate a slight slope away from your house. The standard recommendation is a slope of 1-2%, meaning the driveway should drop 1-2 feet for every 100 feet of length.

Your driveway should also have a slight crown (higher center) or cross-slope to prevent water from running down the middle. To check this, place your level across the width of the driveway at various points. The center should be about 2 inches higher than the edges for every 10 feet of width.

Look for these warning signs of improper grading:

• Water flowing toward your garage or house

• Standing water anywhere on the surface

• Erosion along the edges of the driveway

• Water entering your garage during rain

• Cracks that consistently collect water

• Dirt or debris collecting in certain spots after rain

If your driveway connects to a garage, ensure the entrance point is slightly higher than the driveway to prevent water from flowing into the garage. There should be a gentle transition that allows vehicles to enter smoothly while maintaining proper drainage.

Remember that regional factors like annual rainfall, soil type, and local building codes may affect the ideal grading for your specific situation. When in doubt, consult a professional for an assessment.