Question 1

What is a perimeter drain and how does it work?

Accepted Answer

A perimeter drain (also called French drain, drain tile, or weeping tile) is a perforated pipe installed around the exterior of your foundation at footing level. It collects groundwater before it can build up pressure against your foundation walls and directs it to a sump pit or daylight outlet. Spring snowmelt from the surrounding mountains creates significant groundwater pressure — a functioning perimeter drain is what keeps that water away from your foundation.

Question 2

How do I know if my perimeter drain has failed?

Accepted Answer

Wet or damp basement. Water seeping through foundation walls or the wall-floor joint. Efflorescence — white mineral deposits — on basement walls. Mold or mildew in the basement. A sump pump that runs constantly or never runs (both can indicate drainage problems). Homes built before 1980 often have clay tile or concrete drain tile that has collapsed or become clogged with roots and sediment.

Question 3

What does perimeter drain installation cost?

Accepted Answer

Full exterior installation: $8,000–$25,000 depending on foundation perimeter, depth, and site conditions. Interior perimeter drain systems: $5,000–$15,000 — less disruptive to landscaping. Partial repairs to specific failed sections: $3,000–$8,000. We provide free assessments and detailed quotes after evaluating your property.

Question 4

Interior vs. exterior perimeter drain — which is better?

Accepted Answer

Exterior drains are installed at the base of the foundation on the outside, collecting groundwater before it reaches the wall. Most effective, but requires excavating around the entire foundation. Interior drains are installed inside the basement along the perimeter, collecting water that has already entered and directing it to a sump pump. Less expensive and less disruptive, but manages water after entry rather than preventing it. The right choice depends on your situation.

Question 5

How long do perimeter drains last?

Accepted Answer

Modern corrugated plastic pipe wrapped in filter fabric: 30–50 years. Older clay tile and concrete drain tile found in homes built before 1970 are now reaching the end of their service life. Tree root intrusion, sediment accumulation, and pipe collapse are the most common causes of failure in established neighborhoods with mature trees.

Question 6

Can you repair a perimeter drain without full excavation?

Accepted Answer

Sometimes. If the failure is localized to a specific section, we can excavate only that area for a targeted repair. We use camera inspection to assess the condition of existing drain tile before recommending full replacement. For homes where exterior excavation isn't practical, an interior perimeter drain system combined with a sump pump can effectively manage basement water without disturbing the exterior.

Perimeter Drain
Installation — Kamloops

When Perimeter Drains Fail

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Perimeter DrainInstallation — Kamloops

When Perimeter Drains Fail

Related Services

Common Questions

Book a Perimeter Drain Assessment

Need a Plumber?

Related Services

Why Kamloops Trusts Us

Perimeter Drain
Installation — Kamloops