Waterproofing · Service

Egress Window Well Drain with your waterproofing project

A window well is a bucket held against your foundation. The drain in the bottom of it is the only thing keeping the water on the correct side of the glass.

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This page covers egress window well drain as part of a waterproofing project. For the full guide — every option, the complete process and detailed pricing — see our main egress window well drain guide.

In short

What is egress window well drain?

A window well drain is a vertical outlet in the base of the well — usually a stone-filled shaft with a pipe running down to the footing drain, or a line taken to daylight where the lot allows — that removes water before it can reach the window. Without a working one, a window well behaves exactly like the container it resembles: rain and roof runoff collect in it, the level rises past the sill, and water enters through the window, which is not a waterproofed part of the wall and was never intended to hold back standing water.

The job

How egress window well drain actually works

Establish whether a drain exists at all

Clear the well to the base and look. Some have a stone-filled shaft with pipe, some have a few inches of gravel over soil, and some have a drain silted solid. Filling the well with a hose tells you more than any inspection.

Watch for: A well that holds water after the hose stops. That is not a well needing more gravel — it is a well with no functioning outlet, and adding stone on top of a blocked drain changes nothing.
Find out what the drain connects to

A well drain has to terminate somewhere lower: most often it drops through stone and pipe to the footing drain around the foundation, sometimes it is run to daylight on a sloping lot, and sometimes it is tied into an interior perimeter system and pumped out with everything else.

Watch for: A well drain connected to nothing but the soil beneath it. In clay ground that is a hole that fills as fast as the well does, which is why these wells flood in exactly the storms that matter.
A new egress well is a new hole in a foundation that was previously intact

Cutting an opening into an existing basement wall for an egress window creates a fresh path for water at a point where the wall was continuous. The cut edges, the new frame perimeter and the excavation backfilled against the wall are all new joints — and the well itself now concentrates water at that exact spot.

Watch for: A window-cutting quote that treats the well drain as an afterthought. On a retrofit egress opening, the drain and the sealing of the new perimeter are not accessories; they are the reason the project does or does not leak.
Correct the water arriving from above and around

A drain sized for groundwater is not sized for a downspout. Move roof water away from the well, re-establish ground that slopes away from the rim rather than into it, and the drain has far less to do.

Watch for: A downspout discharging near the well, or a flower bed built up against its rim so surface water runs straight in. Both are cheap to correct and both overwhelm a perfectly good drain.
Fit a cover — the right kind, for the right reason

A clear, sloped, well-fitted cover keeps rain, leaves and snow out of the well, which is usually more valuable than any amount of extra gravel. On an egress well the cover has to be openable from inside without tools or special knowledge; on a non-egress well it just has to shed water and be secure.

Watch for: A flat cover that ponds water, or one that traps humid air against the window. And on any egress opening, confirm the cover arrangement with your local building official — escape requirements govern, and they are not this page's call to make.

Money

What does egress window well drain cost?

Clearing a silted well and restoring stone is a small job. Cutting a new drain shaft down to the footing drain, or trenching a run to daylight, costs considerably more — driven by depth, soil and whether there is a functioning footing drain to connect to at all.

See the full egress window well drain cost guide — by material, size and region →

Straight answer

When egress window well drain is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The well is simply full of leaves and soil. Dig it out, restore the stone, and test it with a hose before anyone quotes drainage work. A significant share of flooded wells are blocked, not undrained.
A downspout is emptying beside it. No well drain is designed to absorb a roof. Move the discharge, watch a storm, and reassess.
There is no functioning footing drain to connect into. A new well drain is only as good as its destination. If the footing drain is absent or silted, connecting to it buys you a longer route to the same standing water.
Water is entering at the floor-wall joint, not at the window. That is a different problem with a different fix. Confirm the entry point before spending money on the well.
You are about to have the basement waterproofed anyway. The well drain, the perimeter system and the pit get designed as one thing. Doing the well first often means paying to redo the connection.

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Related work

Often done at the same time

Basement Waterproofing

The wider decision

Interior Drain Tile

Where a well drain sometimes routes

Sump Pump System

When there is no gravity outlet

Window Services

Egress sizing, the window itself and code

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FAQ

Egress Window Well Drain — questions people ask

Still have a question? Talk to our team →

Why does my window well keep filling with water?

Either the drain has silted up or was never there, or more water is arriving than any drain could handle — usually a downspout nearby or ground sloping into the well. Test it with a hose: if the well holds water after you stop, you have a drainage problem. If it drains fine under a hose but floods in storms, you have a volume problem, and the fix is outside the well.

Where does a window well drain go?

Down. The common arrangement is a stone-filled shaft with pipe connecting to the footing drain around the foundation, so the well shares the same route out as the rest of the below-grade water. On sloping lots it can run to daylight, and where an interior perimeter system exists it may be routed into that and pumped. What does not work is a shaft that simply ends in the surrounding soil.

Does a new egress window make my basement more likely to leak?

It introduces a new opportunity for one. Cutting through a previously continuous foundation wall creates joints at the cut edges and around the new frame, the excavation for the well puts freshly disturbed backfill against the wall, and the well concentrates water at that point. Done well it is fine; the drainage and the sealing of the new perimeter are the parts that decide which it is.

Do window well covers actually help?

Considerably, because the cheapest water to deal with is the water that never gets in. A sloped, well-fitted cover keeps out rain, snow and the leaf litter that silts drains up in the first place. On an egress well it must be openable from inside without tools — check the requirement with your local building official before buying anything.