From a Flooded Basement to a Patented Fix

From a Flooded Basement to a Patented Fix

As Featured In Valley Business Front

From a Flooded Basement to a Patented Fix

Karl Mardian · DrainDome LLC · April 2026


Featured in Valley Business FRONT — Issue 211, April 2026 · Pages 22–23

Some business ideas are born in a boardroom. Mine was born in a wet basement.

When my family moved into our home in the Penn Forest area of Roanoke County, we were excited about the newer construction. What we didn't expect was discovering, the hard way, that age alone doesn't protect you from drainage disasters. Our basement flooded three times — all because of the standard, tiny flat drain covers that are used in the overwhelming majority of residential construction projects. The problem wasn't the drain itself. It was that those covers get buried under leaves and debris, and once they're blocked, water has nowhere to go.

A Problem Nobody Had Solved

I went to every local hardware store looking for a solution. I found nothing. Out of curiosity, I knocked on neighbors' doors and asked how they were dealing with the same issue. The answers ranged from blocking their basement doors entirely to duct-taping pieces of old screen doors over their drains. Homeowners everywhere were rigging makeshift workarounds for a problem that demanded a real, permanent solution.

That's when the idea hit me: a mushroom-shaped dome with a stem to anchor it in place. Simple in concept, but the engineering mattered. I partnered with a friend who had the technical expertise to create a 3D rendering, and from there it took 14 different modifications and rounds of rigorous testing to get it right. The final design delivers 8.5 times the drainage surface area of a standard flat cover — which means it stays clear and functional even when completely buried in leaves.

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I needed a new venture business like I needed a hole in the head. But I had a problem I couldn't ignore. My own basement was flooding; and once I found a solution that worked for me, I felt a responsibility to bring it to market so other homeowners could have that same peace of mind.
— Karl Mardian, as quoted in Valley Business FRONT, April 2026

From Prototype to Patented Product

Getting a good idea to market is its own journey. My first real validation came from sitting down with Charlie Overstreet of Northwest Hardware, a man who has seen thousands of products come through the door and knows what homeowners actually need. His encouragement was the green light. From there, I secured a U.S. patent (Patent No. 10,113,303) and found an American manufacturer in Illinois.

Today, DrainDome is 100% American-made, and we handle all regional distribution right here from Roanoke, Virginia.

8.5× More drainage surface than flat covers
18 Northwest Hardware locations carrying DrainDome
100% American designed, patented & manufactured

Where You Can Find DrainDome

DrainDome is available right here on our website, on Amazon, and at all 18 Northwest Hardware locations across the region. We're also in the final stages of expanding to Walmart, Lowe's, and Home Depot's online storefronts — because the goal has always been simple: every homeowner should have access to this fix.

The product retails for around $30. One purchase. One installation. No more rigging screens over your drain with duct tape. No more anxious walks to the basement door after every heavy rain.

Why This Story Matters

Valley Business FRONT featured DrainDome in their April 2026 issue (pages 22–23) as part of their Entrepreneurial Front section — a nod to the kind of problem-solving that starts not with venture capital and pitch decks, but with a real headache and the determination not to pass that headache on to your neighbors. We're proud to be a Roanoke Valley business, manufacturing in America, and solving a problem that affects millions of homeowners across the country.

If you've ever dealt with a flooded basement stairwell, you already know why this exists. If you haven't — don't wait until you do.

Stop the Flooding Before It Starts

The permanent fix for outdoor basement drains. Patented, American-made, and built to last.

Shop DrainDome — $30