What is the proper way to grade and regrade the soil around a Riverview home to direct surface water away from the foundation and reduce basement leakage?

Proper grading around your Riverview home should create a 6-inch drop over the first 10 feet from your foundation, directing surface water away from basement walls before it can infiltrate and cause leakage.

Grading is your first line of defense against basement water problems in the Moncton area. Riverview sits on heavy clay soils that hold water against foundations, making proper surface drainage absolutely critical. Many basement leakage issues in Riverview homes stem from poor grading that allows spring snowmelt and summer storms to pool against foundation walls, creating hydrostatic pressure that forces water through cracks, mortar joints, and porous concrete block walls common in older Riverview homes.

Proper Grading Specifications for Riverview

The ideal grade slopes away from your foundation at 2-5% grade (about 1/2 inch per foot) for the first 10 feet, then can level off. This means the soil should be 6 inches lower at 10 feet from your foundation than at the foundation wall. In Riverview's clay soils, this slope is even more important because clay doesn't absorb water quickly — it sheds water across the surface, and you want that water moving away from your basement walls, not toward them.

Start by walking around your home after a heavy rain or during spring thaw. Look for areas where water pools near the foundation, muddy spots that stay wet, or places where water flows toward rather than away from your house. These are your problem areas that need regrading. Pay special attention to areas where driveways, walkways, or patios may have settled and now direct water back toward the foundation — this is extremely common in Riverview due to the clay soil's expansion and contraction cycles.

Regrading Process and Materials

For minor adjustments, you can add clean fill dirt (not topsoil, which retains water) to build up low areas and create proper slope. Use a mixture of sand and clay-based fill that compacts well but still allows some drainage. Pure clay fill will just create more water retention problems. For Riverview's climate, avoid using mulch or organic materials directly against the foundation — they hold moisture and can create ideal conditions for foundation wall deterioration.

For more significant grading issues, you may need to remove existing soil that's too high against the foundation and replace it with proper fill material. The soil should never be higher than 6 inches below your siding or brick veneer. If your basement windows are at or below grade level, you'll need to create window wells with proper drainage to prevent water from entering through the windows during heavy rains.

Riverview-Specific Considerations

Spring thaw is particularly challenging in Riverview because the clay soils freeze deep and thaw slowly, creating surface water runoff while the ground below is still frozen and can't absorb moisture. Your grading needs to handle this seasonal water surge. Consider where the water will go once it leaves your property — you don't want to direct it toward your neighbor's foundation or create erosion problems on slopes.

The heavy clay soils in Riverview also mean that even with proper grading, you may still need interior waterproofing solutions like a sump pump system or interior drainage channel. Grading fixes surface water, but groundwater and hydrostatic pressure from the high water table near the Petitcodiac River often require additional measures.

When to Hire a Professional

You can handle minor grading adjustments yourself — adding fill dirt and reshaping with a rake and shovel. However, hire a professional for major regrading that requires moving significant amounts of soil, installing drainage systems, or working near utilities. Also get professional help if your foundation walls show signs of settlement or if regrading would affect your driveway, walkways, or landscaping significantly.

Need help finding a basement waterproofing contractor to complement your grading work? New Brunswick Basements can match you with local professionals who understand Riverview's unique soil conditions and drainage challenges.