Every big storm, it’s the same thing: the rain stops, the sun comes back out, and your backyard is still sitting under two inches of water.

If your yard floods every time it rains, you’re not unlucky — you’ve got a drainage problem. And in North Texas, there are only a handful of reasons it happens. Most of them are fixable, and a few of them you can diagnose yourself before you ever pick up the phone.

We’re a roofing company that also does drainage and irrigation work, so we see the whole water path: from the shingles on your roof, down the gutters, across the yard, and out to the street. A lot of “yard flooding” problems actually start on the roof. Let’s walk through how to figure out what’s going on with yours.

Start at the Top: Your Roof Moves More Water Than You Think

Here’s a number most homeowners never think about: one inch of rain falling on a 2,000-square-foot roof produces roughly 1,250 gallons of water. All of that water has to go somewhere — and “somewhere” is usually the four corners of your house, right where your downspouts let out.

That’s why the first thing we check on any drainage call is the roof-to-yard connection:

• Where do your downspouts discharge? If they dump right at the foundation or into a flat spot in the yard, you’ve found at least part of the problem. Downspout extensions that carry water 6–10 feet away from the house fix more flooding than people expect.
• Are your gutters overflowing? Clogged or undersized gutters spill water straight over the edge, and it lands in one concentrated line along the foundation. Clean them out and watch the next storm from a window — you’ll learn a lot in ten minutes.
• Is one side of the house worse? If the flooding always starts under the same roof valley or below the same gutter run, the roof is telling you exactly where the water is coming from.

Think of it as one system: roof, gutters, grading, drains.

Walk Your Yard While It’s Wet

The single best diagnostic tool costs nothing: your own eyes, during or right after a rain. Dry-yard detective work misses most of it. Next time it storms, grab a rain jacket and walk the property.

You’re looking for answers to three questions:

1. Where does the water come from? Does it sheet in from a neighbor’s lot, pour off your roofline, or appear everywhere at once?
2. Where does it sit? Mark the low spots with a flag or a stick. Water standing in the same places every time means grading or soil issues, not just a heavy storm.
3. How long does it stay? Puddles that drain within a few hours are normal in a clay-soil region. Water that stands 24–48 hours or more is a problem — it may be working toward your foundation.

Snap phone photos from the same spots during a couple of storms — they’re gold if you end up calling a contractor.

The Usual Suspects in North Texas

Nine times out of ten, Rockwall-area yard flooding comes down to one of these:

• Clay soil. Most of North Texas sits on dense black clay that drains very slowly. Even a well-graded yard can pond after a fast rain because the soil can’t absorb water fast enough.
• Flat or negative grading. Newer subdivisions are often graded flat for looks, and over time the soil around a foundation settles, creating a shallow bowl that collects water against the house. The rule of thumb: soil should fall about 6 inches over the first 10 feet away from your foundation.
• Builder backfill settling. The soil piled around your foundation during construction compacts and sinks over the first few years, leaving low spots right where water does the most damage.
• Downspouts with nowhere to go. A 3×4-inch downspout can move a lot of water — but if it ends two feet from your slab, all that roof water becomes a yard problem (and eventually a foundation problem).
• Neighbor runoff. If a neighboring lot sits higher, their water becomes your water — and fences or retaining walls can accidentally dam it in.
• Compacted soil. Years of foot traffic, mowing, and construction equipment can compact the top few inches so badly that water can’t penetrate at all. Aeration helps, but it’s not a cure for real drainage failure.

Three Quick Tests You Can Do Yourself

1. The percolation test. Dig a 12-inch hole in the problem area, fill it, let it drain fully, then fill it again and time the second drain. If it’s still sitting there hours later, your soil drains slowly — surface water needs a mechanical way out, like a drain, not just time.

2. The grade check. Run a 10-foot 2×4 or string line from the foundation outward with a level on it. The far end should sit about 6 inches lower. If it’s level — or slopes back toward the house — you’ve found a grading problem.

3. The downspout audit. During the next rain, watch each downspout: which ones gush, which trickle, and where the water goes after it leaves the pipe. One that discharges onto a flat patio or into a flower bed is just relocating the flood.

What Fixes Actually Cost (Rough Estimates)

Nobody can price your yard from a blog post, but here’s an honest ballpark. All rough estimates — every yard is different:

• Downspout extensions (above ground): a few hundred dollars installed. The cheapest fix with the biggest payoff.
• Underground downspout drains: typically $1,500–$4,000 depending on length and downspout count. Buried pipe carries roof water to the street or a pop-up emitter.
• Regrading: roughly $1,000–$3,000+ for a typical yard, depending on soil volume and whether sod must be replaced.
• French drain: roughly $2,000–$6,000+ depending on length and soil. A gravel-filled trench with perforated pipe that collects subsurface water — great for soggy areas that never dry out.
• Channel (trench) drain: roughly $1,500–$4,000 for a driveway or patio. The grates you see across driveways that intercept sheet flow before the garage.

The right fix depends on the diagnosis, which is why the walk-and-watch step matters. The most expensive mistake in drainage work is installing the wrong solution — a French drain won’t fix a grading problem, and regrading won’t fix clay that can’t absorb water.

When to Call a Pro

Call a drainage contractor when:

• Water stands against your foundation for more than a day after rain
• You’re seeing cracks in brick, sticking doors, or other foundation-movement signs
• The flooding comes from a neighbor’s lot or a source you can’t control on your own
• You’ve tried the simple fixes (extensions, gutter cleaning, aeration) and the water still won’t leave
• The yard needs equipment — regrading and French drains are not weekend DIY projects in North Texas clay

One more roofer’s note: if the flooding started after a roof replacement or gutter job, mention it — a new, more efficient gutter system can move water faster than old yard drainage can handle.

Frequently Asked Questions

How long can water stand in my yard before it’s a real problem?

A few hours after a heavy storm is normal in North Texas clay. If water is still standing 24–48 hours later, or if it’s sitting against your foundation, that’s a drainage problem worth fixing — not just an inconvenience.

Will a French drain fix my flooding?

It depends on the cause. French drains are excellent for subsurface water and soggy areas, but they won’t fix surface sheet flow from a neighbor’s lot or a downspout dumping at the foundation — those need grading or downspout work first. Diagnose first, dig second.

Can I fix yard drainage myself?

The simple stuff, yes: cleaning gutters, adding above-ground downspout extensions, and top-dressing minor low spots are fair DIY. Anything involving trenching, regrading with equipment, or tying into storm drainage is pro work — especially in clay, where a poorly built drain fails fast.

Does yard drainage really affect my foundation?

Absolutely. Expansive clay swells when wet and shrinks when dry — that movement cracks foundations in DFW. Drainage that keeps water away from the slab is some of the cheapest foundation protection you can buy.

Who should I call — a landscaper or a drainage contractor?

For planting and irrigation, a landscaper. For standing water, grading, and drains, you want a contractor who does drainage as a specialty — someone who’ll diagnose the water’s path before selling you a trench. Ask how they determine where the water comes from; if they don’t have a clear answer, keep looking.

Your yard shouldn’t turn into a lake every time it storms. Most North Texas drainage problems come down to a short list of causes — clay soil, flat grading, and roof water with nowhere to go — and once you know which one you’ve got, the fix is usually straightforward.

If you’ve walked the yard, run the tests, and the water still won’t leave, get in touch with us. We’re Roofing & Construction by Peterson in Rockwall, Texas — roofers who also do drainage and irrigation, so we look at the whole water path from shingles to street. Call (214) 519-9478 and we’ll come take a look.