7 Signs Your Foundation Has a Drainage Problem

7 Signs Your Foundation Has a Drainage Problem

How do you know if your foundation has a drainage problem? Watch for standing water near the house after rain, white crusty stains on foundation walls, soil washing away from the slab, overflowing gutters, doors that stick in wet seasons, a musty crawl space, and water stains on walls or floors. In Shreveport, where heavy clay soil holds water against foundations for days, drainage problems are among the most common — and most fixable — causes of foundation damage. Here are the seven signs, what each means, and what to do about it.

Standing water, efflorescence, eroding soil, overflowing gutters, seasonal sticking doors, musty crawl spaces, and water stains are the seven classic signs of a foundation drainage problem. Each one points to water going where it should not — and each one has a fix.

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The 7 Signs Your Foundation Has a Drainage Problem

None of these signs requires special equipment to spot. Walk your property after the next good rain and check for each one.

1. Standing water near the house after rain

Puddles lingering against the foundation for a day or more are the most obvious drainage red flag. Some ponding in a low yard corner is normal; water sitting against the slab or piers is not. It means the grade is flat or sloping the wrong way. What to do: note how long the water takes to drain, then fix the grade — soil should slope away from the house at least six inches over the first ten feet.

2. White, crusty stains on foundation walls (efflorescence)

Those chalky white deposits on concrete or brick are mineral salts left behind when water moves through the masonry and evaporates. Efflorescence itself is harmless, but it is a receipt: it proves water is traveling through your foundation walls on a regular basis. Heavy or widespread efflorescence means significant, ongoing water contact. What to do: trace where the water is coming from — usually saturated soil against that section of wall — and improve drainage on that side of the house.

3. Soil washing away from around the foundation

Look for exposed footing edges, gaps between the soil and the foundation, or gullies carved through the beds around the house. Erosion removes the soil your foundation bears on. What to do: this one deserves prompt attention. Fill and regrade the eroded areas, fix whatever is concentrating the water — usually a downspout or slope issue — and get an inspection if the footing is exposed.

4. Gutters overflowing or downspouts dumping at the foundation

Watch your gutters during a hard rain. Water cascading over the sides means they are clogged, undersized, or pitched wrong — and every gallon lands at the foundation. Then check the downspouts: if they discharge within a foot or two of the house, your roof is irrigating your foundation with hundreds of gallons per storm. What to do: clean the gutters and extend every downspout at least four to six feet out. It is the cheapest drainage fix there is.

5. Doors and windows that stick in wet seasons

A door that worked in October but sticks every April is telling you about soil movement, and soil movement here is almost always about water. Saturate the clay and it swells and lifts; dry it out and it shrinks and drops, racking frames just enough to bind. What to do: seasonal sticking that resolves on its own is worth monitoring — but it confirms water is cycling under your foundation, so drainage improvements will pay off.

6. A musty or damp crawl space

On pier-and-beam homes, the crawl space is where drainage problems hide. A musty smell, damp soil, condensation on ductwork, or mold on joists all mean moisture is collecting under the house with no way out — and chronic moisture rots beams, rusts fasteners, and draws termites. What to do: check that vents are clear and the soil under the house is not lower than the surrounding grade. Persistent dampness needs a drainage solution, not just a dehumidifier.

7. Water stains on walls, floors, or the slab edge

Brownish tide marks on a garage wall, staining along the base of an exterior wall, or a dark line on the slab edge where it meets the soil all show where water has been — repeatedly. Stains mean the water contact is chronic, not a one-time event. What to do: stains are a map. Follow them to the source: the side of the house where grading, gutters, or soil saturation is letting water linger, and fix the water path before repairing the cosmetic damage.

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What Causes Drainage Problems Around Foundations

Almost every residential drainage problem traces back to a short list of causes, and most of them were built into the property decades ago.

The biggest one is grading — or the lack of it. Countless Shreveport homes were built with the surrounding soil essentially flat, and over the years, beds get built up, mulch accumulates, and sidewalks settle, until the soil actually slopes toward the house. Water obeys gravity, so it collects exactly where you do not want it. The LSU AgCenter’s lawn and landscape drainage resources at lsuagcenter.com cover the basics of getting surface water moving in the right direction.

Next is the roof-water problem: clogged gutters and short downspouts. A 2,000-square-foot roof sheds well over a thousand gallons in a one-inch rain. If the gutters spill it at the foundation line, or the downspouts end two feet from the house, that is a thousand gallons per storm going straight into the clay around your foundation.

Then there is the soil itself. Our clay absorbs water slowly, so even good grading can be overwhelmed in a gully-washer — water runs to the lowest point, often the disturbed soil right against the foundation from the original excavation. Add a high water table near Cross Lake and the Red River and flat lots with nowhere for water to run, and you have the full Shreveport drainage picture.

Why Drainage Problems Become Foundation Problems

Water near a foundation is not just a nuisance — it is the starting point of most structural damage we see in Shreveport. Here is the chain of events.

First, standing water creates hydrostatic pressure against foundation walls and slab edges. Saturated soil transmits that pressure directly to the structure, pushing water through cracks, cold joints, and porous masonry — and pushing soil against below-grade walls hard enough to bow them.

Second, our clay soil weaponizes the wet-dry cycle. Saturated clay swells and heaves upward against the foundation; when summer drought arrives, it shrinks and pulls away, leaving voids. The house settles into those voids unevenly — one corner drops, a section of slab tilts — and the next wet season starts the cycle again. Every cycle moves the house a little more. This is the engine behind the settlement patterns described in our signs of foundation settling guide: the cracks and sticking doors are often the visible end of a drainage problem that started years earlier.

Third, moving water erodes. Concentrated runoff from a downspout or a slope can wash supporting soil out from under footings and piers surprisingly fast — one bad storm season can undo decades of stability. And in pier-and-beam homes, chronic moisture under the house quietly destroys the wood structure the whole home rests on.

The takeaway is straightforward: drainage correction is foundation protection. Fixing the water is almost always cheaper than fixing what the water breaks. The USGS explains how groundwater interacts with soils and structures at usgs.gov, which is worth a look if you want the science behind what your yard is doing.

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How to Check Your Own Yard After a Heavy Rain

You do not need any special tools for this — just a rainy day, a pair of boots, and thirty minutes. Here is the walkthrough.

• Walk the full perimeter during the rain if you can. Watch where water flows and where it stops. Note every spot where it pools against the house, and watch the gutters for overflow. What you see during the storm tells you more than what you see the next day.
• Check every downspout discharge point. Each one should send water at least four to six feet from the foundation. Mark any that dump at the house — those are your cheapest fixes.
• Look at the grade with fresh eyes. Stand back and sight along the foundation line. Does the soil visibly slope away, or does it look flat or — worse — like it dips toward the house? A four-foot level laid on the ground makes small slopes obvious.
• Time your puddles. Note when the rain stops and check back in 12 and 24 hours. Water still standing against the foundation after a full day means the soil is saturated and the grade is not carrying water away.
• Peek into the crawl space or check the slab edge. On pier-and-beam homes, look for standing water or fresh mud under the house. On slabs, look for soil washed away from the slab edge or water stains on the concrete.
• Photograph everything. Date-stamped photos of puddles, erosion, and stains give a drainage contractor — and your future self — a clear record of what is happening and whether it is getting worse.

If this walkthrough turns up two or more of the seven signs, you have a drainage project, not a drainage question. Our seasonal foundation maintenance guide for Louisiana has a calendar for staying ahead of these problems through the year.

Drainage Fixes, From Simple to Structural

Not every drainage problem needs a french drain. Work from the cheapest fix upward — many Shreveport homes are solved at the first two rows of this table.

Start with gutters and downspouts — cheap, fast, and often the whole problem. Regrading is the next best fix for surface water. When soil stays saturated against the foundation for days, subsurface solutions like french drains earn their keep. Our drainage correction and water management services cover the full range, and a free inspection tells you which row of this table is yours.

When to Call for a Drainage and Foundation Inspection

Some signs mean act now, and some mean watch and plan. Here is how to tell the difference.

Call promptly if you see soil eroding away from the footing, water actively seeping into the home, new cracks appearing after a storm season, or any sign that is clearly getting worse month to month. Erosion that exposes the footing and active water entry are not watch-and-wait situations — they are doing damage while you watch.

Monitoring is reasonable for a single sticky door that resolves when the weather dries out, light efflorescence with no other symptoms, or puddles that drain within a day. Take your photos, note the dates, and check again next season. If the pattern holds steady, you are managing; if it grows, you are postponing.

Either way, the inspection is free, and it converts guessing into a plan: where the water is coming from, whether the foundation has been affected, and which fix fits. Water problems never get cheaper with time. For the bigger picture, browse our foundation repair services.

Frequently Asked Questions

How do I know if water is damaging my foundation?

Look for the pattern, not just one clue. Standing water against the house, efflorescence on the walls, soil washing away from the foundation, and new cracks or sticking doors that track with wet weather together mean water is actively working on your foundation. Any single sign deserves attention; two or more together mean you should get an inspection rather than keep watching. The inspection is free, and it tells you whether you have a drainage project, a foundation project, or both.

What does efflorescence on my foundation wall mean?

Efflorescence — those white, crusty mineral deposits — means water is regularly moving through your masonry and evaporating off the surface, leaving salts behind. The deposits themselves are harmless, but they are proof of ongoing water contact. Light efflorescence in one spot is worth monitoring; heavy or widespread deposits mean significant water pressure against that section of wall and call for drainage improvements on that side of the house.

Is standing water next to my house actually a problem?

Yes, if it lingers. Puddles that drain within a day of the rain stopping are usually just a low spot. Water sitting against the foundation for 24 hours or more means the grade is not carrying water away, and every hour it sits, it soaks deeper into the clay and presses harder against the structure. In Shreveport’s expansive soil, chronic standing water drives the swell-and-shrink cycle that cracks slabs and shifts piers. Fix the grade or the drainage — the water will not fix itself.

Why does my crawl space smell musty after it rains?

Because water is collecting under your house with no way out. Rain saturates the soil around the foundation, moisture migrates into the crawl space, and with poor ventilation it just sits there — feeding mold on joists, rotting beams, and rusting fasteners. A musty smell after rain is the early warning; visible mold or standing water under the house means the problem is advanced. Check that the ground under the house is not lower than the surrounding grade, clear the vents, and get the drainage evaluated before the moisture damages the structure.

Can clogged gutters really damage a foundation?

Absolutely — it is one of the most common causes we see. A 2,000-square-foot roof sheds over a thousand gallons in a one-inch rain. When gutters clog and spill that water at the foundation line, or downspouts discharge a foot from the house, all of it soaks into the clay right against your foundation. Over seasons, that concentrated water drives exactly the swelling, pressure, and erosion that damage foundations. Cleaning gutters twice a year is probably the highest-value foundation maintenance a homeowner can do.

How far should downspouts extend from the house?

At least four to six feet from the foundation, and farther on flat lots where water has nowhere to run. The goal is to get roof water past the disturbed backfill soil around the foundation — that loose soil from the original construction absorbs water fast and funnels it straight down to the footing. Underground extensions to a daylight outlet or a dry well work well where above-ground extensions would cross walkways. Whatever the method, the discharge point should visibly carry water away from the house during a storm.

Should I fix drainage before foundation repair?

In most cases, yes — or at least at the same time. Leveling a house or repairing a wall without addressing the water that caused the damage is asking for a repeat. Many contractors coordinate both: correct the drainage first so the soil stabilizes, then perform the structural repair on ground that will stay put. There are exceptions — a wall in imminent danger of failure gets stabilized first — but as a rule, water first, structure second. A good inspection lays out the right sequence for your house.

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Get a Free Drainage Inspection in Shreveport

Drainage problems do not stay the same size — they grow, and they take the foundation with them. A free inspection maps where water is collecting, whether it has affected your foundation, and which fix fits: grading, gutters, a french drain, or a full drainage system.

Call Pelican Foundation Repair at (318) 585-2003, or visit Pelican Foundation Repair to schedule. We serve Shreveport and surrounding communities — see our full service areas across Caddo and Bossier parishes.

Pelican Foundation Repair
6118 Fairfield Ave, Shreveport, LA 71106, USA
(318) 585-2003