Interior perimeter drain
A continuous collection channel is installed along affected foundation walls and connected to a sump basin or approved gravity outlet.
Perimeter drains, drain tile & water collection
Interior basement drainage systems in Greater Burlington, VT
When water reaches the base of a foundation wall or rises beneath the slab, an interior drainage system can collect it before it spreads across the basement. A contractor installs and replaces perimeter channels, drain tile, wall drainage and sump connections designed around the foundation and the amount of water entering the home.
No phone call needed.
What this service includes
Interior drainage is commonly used for water at the wall-floor joint, recurring groundwater seepage and older footing drains that no longer keep the basement dry. The system must have a dependable outlet, usually a properly sized sump, and should address the entire active water path rather than only the wettest corner.
Common reasons homeowners call
Problems this service can fix
Water appears where the wall meets the floor
Puddles spread along the basement perimeter
Water rises through floor cracks or around posts
An older perimeter drain no longer keeps up
Finished walls hide recurring seepage
The basement gets wet during long rain or spring thaw
Repairs and systems
Repairs and systems
Under-slab drain tile
Perforated pipe in washed stone collects water below the slab and relieves pressure before it reaches the finished floor.
Wall drainage membrane
A drainage layer can direct wall seepage into the perimeter system while protecting the interior surface.
Floor and cove-joint collection
Localized collection details address water entering through slab joints, cold joints, posts or other predictable openings.
Sump basin connection
The drain is connected to a sealed, serviceable basin with pump capacity suited to the actual lift and discharge route.
Finished-basement restoration
Access, removal and replacement of lower wall and floor finishes are planned before installation begins.
Matching the option to the condition
Interior drainage components compared
Interior systems collect water at the floor edge and move it to an outlet. The parts differ in where they collect.
| Component | Where it collects | What to confirm first |
|---|---|---|
| Interior perimeter drain | At the slab edge | Continuous coverage of the leaking walls |
| Under-slab drain tile | Below the slab | Access to the slab and outlet |
| Wall drainage membrane | Behind the wall finish | Where water enters the wall |
| Floor and cove-joint collection | At the joint | That the joint is the main path |
| Sump basin connection | At the outlet | Pump capacity and a clear discharge |
- 01
Where water first reaches the floor
- 02
How much wall and floor area is affected
- 03
Foundation and footing construction
- 04
Existing drains, sump and discharge
- 05
Finished walls, utilities and floor coverings
- 06
Whether exterior runoff is adding avoidable water
Your estimate
What is included in the plan
Continuous coverage
Treating one corner may leave the next section exposed when the water level rises, and the active perimeter needs to be mapped.
A real outlet
A drain cannot work without somewhere reliable to send the water, and pump, basin, pipe size and discharge all matter.
Dust and demolition
Concrete cutting and finish removal should be explained before work starts, including protection and cleanup.
Exterior water
Interior drainage can manage groundwater, but simple gutter, downspout and grading corrections may reduce the amount reaching the foundation.
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Compare the complete interior basement drainage scope.
Sources and Vermont specifics
Interior drains change the air path, so plan a radon test
An interior perimeter drain opens the slab along the wall and connects to a sump. The Vermont Department of Health reports that one in seven Vermont homes has elevated radon, and it advises retesting whenever significant changes are made to a home's structure or mechanical systems. A sump pit, a cut slab and a new discharge line are all changes of that kind, and a lid on the pit affects how soil gas moves.
The practical advice is to test before the work, so you know your baseline, and to test again after the system has run through a normal season. Ask whether the sump pit will be sealed and whether the contractor is willing to accommodate a radon mitigation pipe if the results call for one. A short-term test in the basement is appropriate when the space is used as living space.
Sources: Vermont Department of Health, Radon. Checked September 26, 2026.
Common questions
Interior Basement Drainage FAQs
Does an interior drain go around the whole basement?
It depends on where water enters and how the foundation is divided. Many recurring groundwater problems need continuous coverage along all affected walls; a genuinely isolated leak may need less.
Will the basement floor have to be opened?
Most under-slab perimeter systems require a narrow section of concrete to be removed and replaced. Above-slab channels use less demolition but are not appropriate for every water condition.
Can an interior drain work without a sump pump?
Only when the property has a legal, dependable gravity outlet below the drain. Most basements require a sump basin and pump.