This article is brought to you by TLC Incorporated — Maryland’s go-to source for trusted drainage diagnostics, moisture control, and honest answers from Bob Carr and the TLC team.
Hi, I’m Bob Carr. I’ve walked more properties across Maryland than I can count — and no matter what kind of water problem I’m facing (wet basement, soggy lawn, moldy crawl space), I always start with this same checklist.
Water tells a story. You just need to know how to read it.
This is the exact step-by-step walkthrough we use at TLC. It works. It’s how we solve drainage problems others miss. I’m going to take you through it — and share stories from the field that explain how each step makes a difference.
1. Walk the Whole Property
Start with a full loop around the house. Don’t just look at the puddle.
Ask: – Where’s the high point of the lot? – Where does the water want to go? – Are there slopes, dips, or natural drainage paths?
Story from Crofton, MD: We had a homeowner with water coming into the corner of their basement. Other companies wanted to waterproof the wall. We walked the entire property and saw the backyard had a slope bringing water right toward that spot. The fix? A subtle regrade and one buried downspout. No water since.
Bob’s Tip: Water doesn’t lie. Follow the flow from roof to yard to low spot. You’ll start seeing patterns.
2. Roof & Gutter Check
The roof sheds thousands of gallons of water in a single storm. If your gutters and downspouts are misaligned, missing, or disconnected, all that water lands right at your foundation.
What we check: – Are gutters clean and not overflowing? – Are downspouts connected? – Do they extend 10+ feet away from the house? – Is roof runoff directed toward a slope or into the yard?
Real Experience: In Annapolis, a family had beautiful landscaping but a constantly wet basement. The downspouts ended in the garden beds — just 2 feet from the wall. We extended them 30 feet underground, and within a week, the basement dried out.
3. Slope & Grading
Even small changes in slope can push water the wrong way.
Use a level or just your eye: – Does the ground slope away from the house? – Are there spots where water sits? – Has mulch, soil, or landscaping changed the grade over time?
Client Story: In Bowie, we found that a backyard patio had been built level — but the ground around it had settled. Water rolled back toward the house. A simple regrade and gravel swale fixed it.
4. Soil Type & Drain Rate
Maryland has a lot of clay-heavy soil. That stuff holds water like a sponge. It can also keep drains from working properly.
We check: – Is the soil clay-heavy, sandy, or loamy? – Does it stay soggy long after rain? – Can you dig a small hole and watch how fast it drains?
Soil Test Story: In Severna Park, we tested a client’s lawn — water took over an hour to drop 1 inch. We removed the top 10 inches of soil and replaced it with a custom loam-sand-compost blend. The yard now drains in less than 15 minutes.
Bob’s Rule: If water drains slower than 1” per hour, you need to rethink your soil or drainage.
5. Surface Drainage Paths
Swales, slopes, and trenches guide water. If they’re blocked or not present, water pools.
Ask: – Are swales, trenches, or flow lines present? – Do they have enough slope? – Are they blocked by fences, beds, or edging?
Example: In Davidsonville, we saw a fence blocking a swale. Water backed up and flooded the basement window. We added a culvert under the fence and the water now flows through cleanly.
6. Subsurface Drain Systems
Not all drains are visible. Many are buried — and often forgotten.
Check: – Is there an existing French drain, catch basin, or dry well? – Where does it start and end? – Is the pipe solid or corrugated? – Does it have slope and a clean outlet?
Lesson from Laurel: We found a French drain that ended underground — no outlet! That homeowner spent $5,000 for a system that only worked until the pipe filled up. We added an exit and it started working within hours.
7. Sump Pump Discharge
Pumps can’t help if the water comes right back.
Ask: – Does the pump work? – Where does it send water? – Is the discharge line buried? – Does it send water away — or recycle it back near the house?
Real Talk: We’ve seen sump pumps working nonstop because the outlet pipe ended 5 feet from the wall. A $1,000 buried line fixed what waterproofing couldn’t.
8. Basement or Crawl Space Entry Points
Check the inside, too.
- Any white dust (efflorescence) on walls?
- Is the wall/floor joint damp?
- Are there musty smells or signs of mold?
Bob’s Walkthrough: We often start outside, then go in to confirm what we see. Dampness low on the wall usually matches surface grade or downspout position outside.
9. Landscaping & Edging
Pretty yards can cause water problems if not planned right.
Check: – Do mulch beds trap water near the foundation? – Have plantings blocked swales or runoff zones? – Does hardscape (like patios or walkways) slope the wrong way?
Story: A homeowner in Ellicott City had a brick walkway pitched toward the house. They had water in the crawl space after every storm. We repitched the pavers and rerouted a downspout — dry ever since.
10. Neighboring Impact & Easements
Water doesn’t respect fences.
Ask: – Does a neighbor’s yard drain toward you? – Are there shared drainage swales or storm drains? – Are public easements or ditches functional?
Bob’s Note: Many water issues come from next door. We’ve designed dozens of systems to handle incoming runoff legally and effectively.
Final Thoughts From Bob
I use this checklist every week. It’s how we figure out what’s really going on — not just what’s visible on the surface.
Memorable Project: One family in Crownsville was ready to dig up their whole basement floor. We walked the yard and found a blocked dry well 20 feet from the back wall. One fix. Problem gone.
Water problems can be complicated. But if you slow down, walk the yard, and ask the right questions, you’ll find the answer.
📞 Call (410) 721-2342 or schedule your property walk-through at tlcincorporated.com
Because the best solution starts with the best diagnosis. And at TLC, that’s exactly what we do.