Step-by-step fix
Step 1: Make sure the gravel is really the problem
- Look into the window well after rain or after spraying in some water with a hose.
- Check whether water sits on top of muddy, compacted, or leaf-filled stone instead of disappearing through the bottom.
- Scrape the top layer with a trowel. If the gravel is packed with silt and acts more like dirt than loose stone, replacement makes sense.
- Also look for a blocked drain opening at the bottom if your well has one.
If it works: You have confirmed the old gravel is clogged, contaminated, or too compacted to drain well.
If it doesn’t: If the gravel is still clean and loose, the slow drainage is more likely from a blocked drain line, heavy soil buildup below the gravel, or grading problems outside the well.
Stop if:- The window well wall is loose, bent, or pulling away from the house.
- The surrounding soil is collapsing into the well.
- Water is already entering the basement or rising quickly during active rain.
Step 2: Set up the area and remove surface debris
- Put on gloves and clear out leaves, mulch, trash, and any loose dirt from the top of the well.
- Move any cover out of the way and set it aside where it will not crack or get stepped on.
- If the well is deep, work from a stable position and avoid leaning your full weight into the well edge.
- Place buckets or bags nearby for the old gravel.
If it works: The well is clear enough to work in and you can reach the gravel safely.
If it doesn’t: If you cannot reach the bottom safely, use a longer-handled tool or get help rather than climbing into a tight or unstable well.
Stop if:- The well is too deep to work in safely from above.
- You uncover broken glass, sharp metal, or other hazards you cannot remove safely.
Step 3: Scoop out the old gravel and sludge
- Use the small shovel or trowel to remove the old gravel layer a little at a time.
- Separate out large debris as you go so it does not fall back into the bottom.
- Keep removing material until you reach cleaner soil or the drain opening at the base of the well.
- Bag or bucket the old gravel instead of dumping it next to the foundation, where it can wash back in.
If it works: The clogged gravel is out and the bottom of the well is exposed for cleaning.
If it doesn’t: If the gravel layer is very thin and you mostly find mud, keep cleaning until you reach a firm base and can see where water is supposed to drain.
Stop if:- You uncover a crushed drain pipe, broken fitting, or a drain opening packed with roots or hard blockage.
- The bottom keeps caving in as you remove material.
Step 4: Clean the bottom of the well
- Scoop out remaining mud, silt, and loose soil from the bottom so the new gravel does not sit on sludge.
- If there is a visible drain opening, clear around it gently by hand or with the trowel so water can reach it.
- Rinse lightly with a hose to wash fine dirt away, but do not flood the area.
- Let the rinse water settle for a moment and make sure you are not just creating a muddy layer again.
If it works: The base of the well is cleaner, and water has a clearer path down through the bottom area.
If it doesn’t: If rinse water still stands on a clean bottom, the problem may be deeper than the gravel layer and the drain below may need separate clearing or repair.
Stop if:- Water will not move at all after the bottom is cleaned.
- You find signs that the drain below the well has failed or disconnected.
Step 5: Add new washed drainage gravel
- Pour in clean washed gravel a little at a time so it spreads evenly across the bottom of the well.
- Use the trowel to level the gravel and keep it below the window and away from direct contact with the frame.
- Build a loose, open layer rather than packing it down. The air space between stones is what helps drainage.
- Add enough gravel to restore a solid drainage bed, replacing what you removed without burying the window area.
If it works: The well has a fresh, even layer of clean gravel ready to drain water.
If it doesn’t: If the gravel immediately disappears into soft mud or mixes with heavy silt, remove the contaminated material again and clean the base more thoroughly before continuing.
Stop if:- The well fills with muddy water from below while you are adding gravel.
- The surrounding soil keeps washing into the new gravel, which points to a larger drainage or erosion issue.
Step 6: Test the repair with water and watch how it behaves
- Spray water into the well with a hose for several minutes, aiming at the gravel rather than directly at the window.
- Watch whether the water level drops through the gravel instead of pooling on top.
- Check again after 10 to 15 minutes to make sure the well is not holding standing water.
- Reinstall the well cover if you have one and make sure it sits properly so leaves do not refill the well.
If it works: Water moves down through the new gravel and the well stays noticeably drier after the test.
If it doesn’t: If water still ponds after the gravel replacement, the next step is to inspect the drain below the well or the exterior grading that sends too much water into the area.
Stop if:- Water rises toward the window during the test.
- You see water backing up from below the gravel, which suggests a blocked or failed drain path beyond this repair.
Replacement Parts
Repair Riot may earn a commission from qualifying purchases, at no extra cost to you.
FAQ
What kind of gravel should go in a window well?
Use clean washed drainage gravel or similar washed stone that does not contain lots of fines. Dirty or mixed material can clog quickly and undo the repair.
How deep should the gravel layer be?
Replace roughly what was there if it was working before, but make sure there is enough clean gravel to form a real drainage bed at the bottom. Do not pile it so high that it crowds the window or covers parts that should stay clear.
Can I just rinse the old gravel instead of replacing it?
Sometimes a light surface clog can be cleaned, but gravel that is packed with mud and silt usually keeps causing drainage trouble. Full replacement is the better fix when the stone has turned into a dirty, compacted layer.
Why is my window well still filling with water after I replaced the gravel?
That usually means the problem is deeper than the gravel itself. The drain below the well may be blocked, disconnected, or overwhelmed, or the yard may be sending too much runoff into the well.
Do I need a window well cover too?
A cover can help keep out leaves and reduce how fast the gravel gets contaminated again. It will not fix a blocked drain, but it can help the new gravel last longer.