DIY Drainage Inspection for Sloping Sites: A Homeowner’s Checklist
Dealing with water entry issues in homes on sloping sites can be tricky, but catching problems early can save you time, stress, and money. Use this step-by-step checklist to identify potential drainage issues around your property.
1. Observe Water Flow During Rain
Walk around your property during a heavy rainstorm or immediately afterwards.
Identify where water is pooling, flowing, or draining too slowly.
Check for water running towards your home rather than away from it.
2. Inspect Gutters and Downpipes
Ensure gutters are free of leaves and debris.
Confirm downpipes are connected to the stormwater system.
Check if downpipes discharge water well away from the house (downstream).
3. Assess the Ground Slope
Does the ground slope away from your home on all sides? If not:
Look for areas where water could flow toward the foundation or basement.
Note any signs of erosion or sediment build-up near walls.
4. Check Retaining Walls
Inspect retaining walls for signs of water seepage, efflorescence (white powdery residue), or cracks.
Look behind retaining walls for gravel backfill and ensure it hasn’t compacted or clogged over time.
Note if water seems to pool in trenches near walls.
5. Examine Basement or Ground-Level Walls
Look for damp spots, peeling paint, or mould inside your basement or lower rooms.
Check for water stains or musty odours, which may indicate hidden water entry.
Inspect the base of walls for visible water seepage.
6. Evaluate Surface Drainage Solutions
Look for spoon drains, field inlet pits, or other drainage features.
Check if they are clear of debris and functioning correctly.
Ensure water from these systems is directed well away from the house.
7. Test Soil and Drainage
Observe if water takes a long time to drain from the soil after rainfall.
Note if your property has sandy soil over clay, which can allow water to run towards the house.
Check for any exposed clay or compacted areas that might redirect water.
8. Inspect Neighbouring Properties
Look over fences or use aerial maps to assess if water might flow onto your property from upslope neighbours.
Identify potential overland flow paths from nearby properties that could impact yours.
9. Identify Common Problem Areas
Blocked gutters and insufficient downpipes.
Poorly graded ground near the foundation.
Trenches or gravel backfill holding water near walls.
Roof water discharging into ag pipes or ground uphill of the house.
10. Plan Next Steps
For minor issues, consider DIY fixes like regrading soil or clearing gutters.
For larger problems, such as water seepage into walls or significant pooling, consult a structural engineer or drainage specialist.
By following this checklist, you can gain insight into how water interacts with your property and identify areas that need improvement.
A little proactive inspection can go a long way in protecting your home from drainage issues.