Basement Flooding Stops Here! [Replace Old Walkout Drain]

How to Stop Basement Flooding

Hi, I’m Caleb with Dansie Design Build in Herriman, Utah. How do you fix a basement walkout drain that’s flooding? Let’s discuss what we can do to stop basement flooding.

Step 1: Remove the Old Basement Drain

The first step of doing the replacement is to jackhammer out the landing of the basement walkout entry and get the old drain out. Get it out of the way; remove it altogether.

Step 2: Dig Down the Dirt

Once all that concrete’s gone, the next step is to dig the dirt down underneath the landing about three feet. That’s the ideal amount that we have found. Digging a three-foot cube hole is ideal, if it’s possible in your situation with your walkout.

Step 3: Do the Math

The next step is to do some math for your basement walkout drain, and there are a few things that we need to figure out.

The first one is the elevation of the drain. Where does that need to be height-wise? Also, we want to center it. In this case, we did want to center that in the landing.

Next, we need to figure out how much gravel we need to bring in and the thickness of the slab. Typically, they’re four inches thick, but we want to ensure the top of the slab ends at the right height. This way, the last stair in the walkout matches the rest of the stairs.

We can bring in the gravel once we figure out all the math.

Step 4: Build the Basement Drain System

The next thing to do here is to build the basement drain system. In this walkout entry, we used two five-gallon buckets that will remain empty after we put the gravel down.

Then, we also have a catch basin in the middle that filters out and collects any sediment, sand, dirt, and whatnot — debris accumulating over time. So, this is going to be an incredible drain.

Step 5: Install the Drain

For this next step, we need to take the math we did and put it into play. So, we will install the basement drain and ensure it’s level and positioned at the correct elevation. Then, we pull in the gravel to hold that in place while we bring in even more. Double-check and ensure the drain is still positioned in the correct spot.

Step 6: Finish Up the New Basement Walkout Drain

The next thing we do is fill up the rest of the hole with the rest of the gravel. Remember: Leave four inches of height open to place our concrete.

We will be cutting and fitting the rebar, ensuring everything fits well. Once all the concrete is in place, we want to have it sloping toward the drain so that everything drains down in the right spot. We don’t want any puddles or anything like that going on.

Then, we’re going to wait for the concrete to start drying. In this case, it was done in winter, so we built a tent to ensure it didn’t snow or rain on the concrete. We also put in a heater to ensure it didn’t freeze while working.


Need Help with a Flooding Basement?

Don’t hesitate to contact us if you want to avoid flooding or want to know how a basement walkout drain works. Give us a call or request a project consultation with us. We’d be happy to help you.


Have you wondered what it costs to finish a basement in Salt Lake and Utah Counties?  Our basement finishing cost guide will give you everything you need to know.

  • Pricing for 1000 and 1500 square foot basement finishes
  • Pricing to include a bathroom, a kitchen, or open square footage
  • Pricing for Basic, Average, and Luxury Level Finishes
  • Basement walkout entrance pricing
  • Real project costs for basements we have finished
  • How to avoid the most costly mistakes while finishing a basement




Download the basement finishing cost guide

Download our FREE basement finishing cost guide. Inside we go over everything you’ll want to know.

  • Pricing calculation for any sized basement
  • Pricing to include a bathroom, a kitchen, a laundry room, or open square footage
  • Basement walkout entrance pricing
  • How to avoid the most costly mistakes while finishing a basement