Calgary Answers · Buying · Red Flags

What Causesbasement moisture?

In Calgary it is usually water management outside the house, not a failing foundation — which is good news, because outside is cheap to fix.

Ask About a Specific HomeBrowse Calgary Listings

The usual causes, in order of how common they are

  1. Grading. Soil that has settled over the years until it slopes back toward the house, delivering every rainfall and every spring melt straight to the foundation. By far the most common cause and among the cheapest to correct.
  2. Downspouts. Discharging at the foundation instead of well away from it. A downspout extension costs almost nothing and solves a surprising proportion of wet basements.
  3. Window wells without drainage, or filled with debris, so they hold water against a basement window.
  4. Snow piled against the house all winter, which is a distinctly Calgary contribution — then a chinook arrives and it all melts at once against the foundation.
  5. Cracks letting water through. Usually a symptom of one of the above rather than the root cause.
  6. A high water table or poor site drainage, which is the genuinely expensive category and much less common.

What grading should look like

The ground should slope away from the house on every side, noticeably, for several feet. If you stand at the wall and the ground is flat or tilts back toward the foundation, that is the problem — and it is very common on homes twenty years and older, because soil settles.

Check for it yourself on any viewing. It takes thirty seconds per side and it is one of the few genuinely useful things a buyer can assess without an inspector.

Do Calgary houses need a sump pump?

Not universally. A sump pump collects water from the weeping tile around the foundation and pumps it away, and whether one is needed depends on the site, the water table and how the home was built. Plenty of Calgary homes have none and stay dry.

If a home has one, ask two things: does it work, and is there a backup. A sump pump that fails during a spring melt or a power cut is precisely when it was needed. Battery backups exist and are inexpensive relative to a finished basement.

What to look for on a viewing

A finished basement can conceal all of this. That is not sinister — people finish basements — but it is why an inspection matters more in a finished basement, not less.