Weeping tile is the perforated pipe that runs along your footing and carries groundwater away before it can climb your foundation wall. When it fails, water that used to leave your property starts pressing against the wall instead.

It is the most expensive drainage repair on a house and the one most often quoted before anyone has confirmed it is actually the problem. So here is what it costs, and how to find out whether you need it.

  • Exterior replacement with excavation: $300 to $400 per linear foot. This is the same pricing as full exterior waterproofing, because the excavation is the cost.
  • Interior drainage system and sump: $120 to $250 per linear foot. A different repair that does a related job from inside.
  • Camera inspection and line flushing: $300 to $700. Almost always the right first spend.

Why the camera inspection comes first

Exterior weeping tile replacement is a four or five figure job. A camera inspection is a few hundred dollars and it answers the question directly: is the line collapsed, is it clogged, or is it fine.

A partially clogged line is often restored by flushing. A line that is crushed or has separated at the joints is not. You want to know which one you have before anyone puts an excavator on your lawn.

Anyone quoting perimeter excavation without having looked inside the line is guessing with your money.

Signs your weeping tile has failed

Water appearing at the joint where the basement floor meets the wall, rather than running down the wall from a visible crack. That is the signature symptom.

Water along a length of wall rather than one spot. Cracks leak at one point. Failed drainage leaks along a line.

A sump pit that fills slowly or not at all while the basement is wet, which means water is not reaching the pit.

A basement that only leaks under load, during heavy rain or spring melt, and stays dry the rest of the year. Partially blocked tile handles normal weeks and gets overwhelmed by the big ones.

An older Edmonton home with original clay tile. Clay tile sections shift, crack and fill with sediment and roots. If your house predates the switch to perforated plastic, age alone is a reason to look.

Exterior or interior

Exterior replacement digs down to the footing, removes the failed line, installs new perforated pipe in clean gravel, and usually waterproofs the wall while it is exposed. It is the only version that stops water before it reaches your foundation. It costs more because it moves dirt.

An interior system runs drainage inside the footing under the basement floor and routes water to a sump. It does not keep the wall dry. It manages water once it has already arrived. It is the right answer when exterior access is blocked by a deck, a patio, a zero lot line or mature trees, and it is meaningfully cheaper per foot.

What moves the price

Depth of the foundation, because exterior work is priced on how much soil has to move. A full nine foot basement costs more per foot than a shallow one.

Access for equipment. A corner lot with a wide side yard is cheap. An infill where everything moves by wheelbarrow is not.

What sits on top. Decks, concrete patios, mature spruce, gas lines and a neighbour's fence eighteen inches off the wall all add labour or force the job inside.

How many walls. Water usually enters along one or two. Pricing the full perimeter when only the north wall fails is the most common way homeowners overpay on this repair.

Where the water goes. A discharge that runs a few feet to daylight costs a fraction of one trenched forty feet across a yard to reach safe grade.

What to do next

If water is coming up at the floor and wall joint, start with a camera inspection rather than a quote for excavation. It either rules the tile out or tells you exactly which section failed, and it is the cheapest useful information you can buy.

Send us a photo of where the water appears and tell us the age of the house. We will tell you what it looks like and what the inspection would involve, at no cost.

Related reading: interior vs exterior waterproofing and full Edmonton price ranges.

Common questions

How much does weeping tile replacement cost in Edmonton?
Exterior weeping tile replacement with excavation runs $300 to $400 per linear foot in Edmonton. An interior drainage system with a sump runs $120 to $250 per linear foot. A camera inspection and line flushing runs $300 to $700 and is usually the right first step.

How do I know if my weeping tile has failed?
The signature symptom is water appearing at the joint where the basement floor meets the wall, along a length of wall rather than at one spot. A sump pit that stays empty while the basement is wet is another sign, and older Edmonton homes with original clay tile are the most common candidates.

Can weeping tile be repaired instead of replaced?
Sometimes. A line that is partially clogged with sediment can often be restored by flushing. A line that is crushed or has separated at the joints cannot. A camera inspection tells you which situation you are in before you commit to excavation.

Do I have to replace the whole perimeter?
Usually not. Water typically enters along one or two walls. Pricing the full perimeter when only one wall has failed is the most common way homeowners overpay on this repair.

Water at the floor and wall joint?

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