Black waterproofing membrane covering a foundation wall below red brick, open trench in front

A Seasonal Checklist for Keeping Your Basement Dry

A checklist for lasting foundation waterproofing, covering inspection, surface prep, membranes, drainage, backfilling and seasonal maintenance.

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Most basements give you warning before they leak in a big way, and most of the cheap fixes are outside the house. This is the checklist we’d hand a homeowner who wants to stay ahead of water, season by season.

Spring

  • Test the sump pump before the thaw: pour a bucket of water into the pit and watch it run.
  • Walk the basement after the first big rain. Look at the bottom of the walls, the floor joint, cracks and window wells.
  • Check that downspouts are still connected and carrying water away from the house.
  • Look for soil that settled against the foundation over the winter.

Summer

  • Run a dehumidifier if the basement feels damp or smells musty. Summer humidity condenses on cool foundation walls.
  • Regrade any low spots next to the house so water runs away from it.
  • Keep mulch and soil a few inches below siding and window well tops.

Fall

  • Clean the gutters after the leaves drop.
  • Clear leaves and debris out of window wells and check their drains.
  • Make sure the sump discharge line runs clear and won’t freeze at the outlet.
  • Test the backup pump’s battery if you have one.

Winter

  • Watch the sump discharge outlet during cold snaps. A frozen line means the pump is running against a dead end.
  • Keep snow piles away from the foundation where they’ll melt straight down against the wall.

Any time

  • Mark the ends of any crack with a pencil and the date. If it grows, call someone.
  • A horizontal crack or a wall that’s starting to bow needs attention now, not next season.
  • Water coming up the floor drain during storms is a sewer problem. A backwater valve fixes that.

When the checklist isn’t enough

If water keeps coming in after the outside is right, it’s time to look at the foundation itself: crack injection, interior drainage or exterior waterproofing. If you would like us to walk through it with you, call for a free estimate.

We’re Mansour’s Innovations, a waterproofing, excavation and plumbing contractor in Shelby Township, in business since 2014 and working across Macomb, Oakland and Wayne counties. Call (586) 345-7292 for a free estimate. We book from 8 a.m. to 8 p.m. every day and answer emergency calls 24/7.

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