Calgary foundation services
Basement Leak Repair in Calgary
Water is coming into my basement. What do I do right now?
First, deal with electrical safety and move what you can out of the water. Then find where it is entering, because that determines everything: a wall crack, the joint where the floor meets the wall, a window well, or a service penetration each point to a different repair. While water is actively coming in, the fastest useful action is usually outside, redirecting whatever is feeding it, such as a downspout or pooled meltwater against the wall.
We are a referral service, not a contractor. Your request goes to an independent Calgary foundation company.
This page is for an active leak rather than for planning a waterproofing system. If water is coming in as you read, work through the immediate steps below first.
Most Calgary basement leaks are not structural emergencies. They are water arriving somewhere it should not, and the entry point is usually findable.
First steps while water is coming in
- Get this looked at: Keep clear of standing water near outlets, cords and panels; if water is near electrical equipment, treat the area as unsafe until power to it is off
- Get this looked at: Move belongings, and lift anything you cannot move onto blocks
- Get this looked at: Look outside for the obvious feed: a disconnected downspout, pooled meltwater against the wall, a blocked window well, a running hose or a neighbouring discharge
- Get this looked at: Redirect what you find; this often slows the leak within minutes
- Get this looked at: Photograph everything before you clean up, for both the repair conversation and any insurance claim
- Get this looked at: Note exactly where the water appears on the wall or floor, as that is the single most useful fact for whoever assesses it
Where the water is getting in
Through a crack in the wall, most visibly during melt or heavy rain. The wet trail usually points back to the entry point if you follow it upward.
At the cove joint, the seam where the floor slab meets the wall. Water arriving here is coming from below under pressure rather than through the wall.
Through a window well that has filled because its drainage has silted up or was never connected.
Around a service penetration where a pipe or conduit passes through the wall and the seal has failed.
Up through the floor slab or a floor drain, which indicates groundwater under pressure or a sewer issue and calls for different expertise.
Not from outside at all: a failed water heater, a burst supply line or a washing machine hose. Worth eliminating early, because it changes who you call.
What fixes what
Match the repair to the entry point. Installing a system for a problem that is one crack, or sealing one crack when water arrives along the whole floor joint, are the two common expensive mistakes.
Crack injection
Polyurethane injected into the crack to fill it through the wall thickness. Flexible, so it tolerates seasonal movement, and it can be done while the crack is damp.
Best suited to: Water entering through an identifiable crack.
Drainage and grading correction
Redirecting the water before it reaches the wall: downspout extensions, regrading, window well drainage.
Best suited to: Event-driven leaks that track melt or heavy rain. Often the whole fix.
Interior perimeter drainage
A collection channel and sump pump to intercept water arriving at the floor-wall joint and discharge it outside.
Best suited to: Water entering along the cove joint under hydrostatic pressure.
Exterior excavation
Digging to the footing to seal the wall and restore drainage from outside.
Best suited to: Repeat leaks that interior repair has not resolved, and deteriorated walls.
How a leak assessment runs
Locate the entry point
Ideally while it is wet, because a dry basement hides the evidence. Photographs taken during the leak are genuinely valuable here.
Establish the trigger
Melt, rainfall, continuous, or unrelated to weather. This narrows the cause quickly and points at whether the source is surface water or groundwater.
Check outside
Grading, downspouts, window wells and any hard surfaces sloping toward the house. The cause is outside far more often than in.
Rule out plumbing
A supply leak or failed appliance presents very similarly and needs a plumber rather than a foundation contractor.
Repair the entry and the cause
Sealing the entry point without addressing what delivers water there tends to move the leak rather than end it.
Cost and Calgary conditions
What drives the price
A single crack injection sits at the low end of published Alberta ranges. Where the leak turns out to be a drainage failure along the footing, the work moves into system territory and the published Calgary figures rise steeply.
Why this behaves differently in Calgary
Calgary leaks cluster in spring for a specific reason: melt arrives faster than frozen ground can absorb it, so water runs across the surface to the lowest point it can find. A leak that appears in March and vanishes in May is describing surface water, not a failing foundation.
The second Calgary cluster follows summer downpours, where the volume briefly exceeds what the drainage around a house can carry. Both patterns point at drainage capacity rather than at the wall itself.
When to get someone in
Worth acting on now
- Get this looked at: Water entering fast enough to accumulate
- Get this looked at: Water near electrical equipment or a furnace
- Get this looked at: Water arriving alongside new or widening cracks
- Get this looked at: Sewage or drain backup, which is a health matter and a different trade
Reasonable to monitor
- A damp patch that appears briefly during melt and dries out
- Minor seepage in an unfinished basement with no finishes at risk
Questions people actually ask
Why is my basement leaking only in spring?
Because Calgary's snowmelt releases a winter of precipitation over a short period onto ground that is often still frozen and cannot absorb it. Water then runs across the surface to the lowest point, which is frequently the foundation. Seasonal leaks that track melt are a drainage and grading signal rather than a structural one, and the fix is usually outside.
Can a leak be repaired while water is still coming in?
Polyurethane injection is designed to work in wet conditions and expands on contact with water, so an actively leaking crack can generally be dealt with without waiting for it to dry. Exterior excavation is a different matter and depends on ground conditions and weather.
Is a leaking basement an emergency?
It is urgent when water is near electrical equipment or a furnace, when it is accumulating fast enough to damage finished space, or when it arrives with new cracking. Slow seepage into an unfinished basement is not an emergency, though the cause still deserves attention before it becomes one.
Will my insurance cover a leaking basement?
That depends entirely on your policy and the cause, and it is a question for your insurer rather than a contractor. What helps in every case is documenting the water while it is present: photographs, dates, and where it entered. Gradual seepage and sudden events are frequently treated differently.
Get this looked at by a Calgary contractor
Tell us what you are seeing and roughly where you are. We pass it to an independent Calgary foundation contractor who contacts you directly.
We are a referral service, not a contractor. Your request goes to an independent Calgary foundation company.