Outdoor Drainage Project: Large Yard and Patio Drainage Re-do

The Drainage Problem: Water Draining Toward House on Patio and Lawn in Rogers, MN

The goal of this project was to fix the drainage issues on the patio and in the grass area just outside of the patio in the backyard of this home in Rogers, MN. The hill in the backyard directs all water towards the area just behind the back of the house. The grass area, patio, rock beds, and sport court all flood with water whenever any kind of rain would occur. All of this water near the home is a recipe for disaster. This project included pulling up the old patio, getting the pitch away from the home, and installing a large amount of drainage tubing to carry water away to a large french drain. 


Step # 1:  Outdoor Drainage Consultation

The customer reached out to us at KG Landscape and scheduled an outdoor drainage consolation with Kent, our owner and lead designer. Kent met with the customer at their home to observe the backyard hillside drainage issue in person. While there, he collected the site information needed to provide a detailed plan/estimate for a long term solution to the drainage problem.   


Step # 2: A Detailed Proposal

After careful consideration of the drainage problem and the options available to correct the issue, we put together a detailed plan to solve the customer’s backyard drainage problems in a cost effective and dependable way. There were also a number of landscape design options that we discussed before landing on a final design plan for a french drain around the perimeter of the patio and sport court. The plan also included resetting the patio to have proper slope and installing many different 


Below is a section from the drainage proposal detailing the work we did:


Primary French Drain and Dry Well:

Remove and dispose of a 4.5’ strip of existing concrete on the retaining wall side of the sport court. Use a chalk line and concrete saw to cut a clean line. Install a French drain up to 35’ long as seen in sketch below. The French drain will be 2’ wide for the entire length with the end near the patio being 24” and slope down to 48” deep at the far end of the sport court. A 6” corrugated perforated pipe will run down the center of the French drain and line the entire French drain with filtration fabric on all sides. Install a 4” corrugated overflow pipe that will run to the lowest spot in the yard and end with a pop-up emitter. The area between the existing retaining wall and sport court will be top dressed with new river rock up to (5) yards. All soil removed to make room for the French drain and drywell will be hauled off and disposed of.

Patio Renovation:

Remove existing patio stones and 1” sand below pavers to reach existing class 5 layer. Install 2-4” of class as needed to raise patio grade and create slope of at least ¼” per foot away from the house. Slope and compact class 5. Install 1” new course sand, then re-install existing patio pavers. Install new snap edging and stakes to secure patio perimeter. Sweep in new poly sand between paver seams.

Drainage Work below Deck

Install (3) catch basin below the existing down spouts. Install 4” corrugated pipe as underground gutter extension below ground with a slope to carry water into the primary French drain. The French drain will be 25’ long section of 12”-18” deep.  It will also collect any water settling around the foundation and patio and carry that water to the primary French drain. Install (3) yards of new river rock to top dress disturbed rock below the deck.

Bed Work Change:

Move/re-install the existing stone edging as shown below in green. Remove/dispose of the existing sod between new edging and patio. Install weed barrier fabric and 4” of rock. Install the existing flagstones in the rock to create path between lawn and the patio over the new rock.

Patio Base Change:

Remove and dispose of approximately 4”+ of the existing sand base below the paver patio area, then install 4”+ of new class 5 base material.


Step # 3: Installation of Drainage Solutions

Step # 4: Project Completion

All of the work described in the proposal was completed and thoroughly tested by running water through all components of the system. Both we and the customer were 100% confident the drainage issues have been solved in a high quality and reliably way.  We’ve kept in touch with the customer and they’ve had no flooding or water issues since this work was completed in 2018.  


We’ve never seen an outdoor drainage issue we couldn’t fix.  Do you have an exterior drainage problem? Call us today to schedule an outdoor drainage consultation at 763-568-7251. You can also submit a quick quote to our website to get in contact with us!