Eavestroughs move water away from your house, and when they fail, the foundation is where it goes. These five warning signs run from cause to effect, with a quick check for each and a clear point at which to call a specialist.
In This Article
Five signs, from cause to effect
- Water leaves the roof edge or the downspout close to the wall. Watch during steady rain. Overflow that falls in a curtain along a run, or a downspout that ends against the foundation, matters more than it looks: a 40 m² roof section sheds 40 litres for every millimetre of rain, so one storm can put hundreds of litres beside the wall. Check: where does each downspout empty, and how far from the wall?
- Soil beside the foundation stays soggy or sinks toward the house. Check: push a finger into the soil a day or two after rain. Wet, soft ground right at the wall, or a dip that slopes inward, means water is collecting where it should not.
- A trench, bare patch or splash marks appear below the eave. Erosion under a downspout, mulch washed into the lawn and mud streaks on the lower wall show water arriving with force. Check: look along the drip line and around each outlet.
- The basement is damp in the same place, after rain. A musty smell, white powder on the wall (efflorescence) or a wet patch at the base of a wall are the signs. Check: find the wet spot inside, then go outside and see which downspout or roof run sits directly above it.
- Cracks widen or things start to move. New or growing cracks in a foundation wall, doors and windows that stick, gaps between a walkway or porch slab and the house, and steps that tilt all point to shifting soil. Check: mark the ends of a crack with a pencil and date it.
One sign in isolation may be nothing. Two or three that line up along the same wall are a pattern worth acting on.
Why water at the wall matters in Ontario
Wet soil pushes harder against a basement wall than dry soil does, and it carries water toward any crack, joint or gap. In winter, soil that stays saturated can freeze and expand, and freeze-thaw cycles run from November to April. A trough that dumps water beside the foundation repeats this on every storm.
Gutters are only one possible cause. Grading, window wells, weeping tile and the age of the foundation all play a part. But gutters are the cheapest cause to control, which makes them the sensible place to begin.
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What to do today
- Clear and flush every downspout, then confirm each one delivers water freely at the bottom.
- Add or straighten extensions so water lands well away from the wall. The downspout extensions guide covers distance and options.
- Check the ground slope. Soil should fall away from the house, and grading soil around the foundation explains the common guideline.
- Check where the water lands. Water that hits a driveway, walkway or patio sloping toward the house runs straight back to the wall. Redirect it onto lawn or beds that slope away.
- Clear window wells and any drain grates beside the wall.
- Photograph everything with dates, including the crack marks, so you can see change over time.
Do not seal a wet basement wall from the inside and assume it is fixed. That hides the water without stopping it.
When to call a foundation professional
Stop guessing when you see any of these.
- A crack wider than a pencil line that keeps growing, or a horizontal or stair-step crack.
- A wall that bows inward.
- Water entering the basement even after the gutters and grading are sorted.
- Doors and windows that stick more each month.
A gutter crew cannot judge structural movement, and a foundation specialist will want to know what the gutters and drainage were doing first. So fix the water side, then get the wall assessed. Improving drainage around your home covers what else to check.
Where a gutter crew fits
A crew can clear the troughs, flush the downspouts and point out sags, open seams and outlets that end too close to the wall. D&D Home Services offers gutter cleaning from $125 for a typical Kitchener-Waterloo home, with a free quote confirmed in writing before work begins. Mention the wet spot in your basement when you call, so the crew checks the run above it first.
Key Takeaways
- Watch for water leaving the eave or downspout close to the wall, soggy or sinking soil, erosion below the eave, damp basement patches and widening cracks.
- Two or three signs along the same wall form a pattern that deserves action now.
- Flush every downspout, extend the discharge, check the grading and clear window wells before the next rain.
- A crack that keeps growing, a bowing wall or persistent seepage needs a foundation professional after the water side is fixed.
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