Landscape Rock Installation — River Rock Beds and Foundation Rock
Rock is the bed you do not redo every two years: no mulch washing out, no re-spreading, and a clean line along the foundation, the deck or the fence that stays.
JMB Builders does landscape rock installation across the Twin Cities metro and north to St. Cloud: river rock or trap rock beds along the foundation, under a deck, along a fence or around a patio, and mulch beds converted to rock. The bed is cleared and graded, an edge set, landscape fabric laid and pinned, and the rock spread to an even depth and kept off the siding. Priced per project by the bed and the tons of rock.
- Priced per project, by the bed and the rock
- Fabric under every rock bed, pinned and lapped
- Rock graded away from the foundation
- Rock delivered and wheeled or dumped in place
- Licensed MN contractor BC809005
Rock beds are a grading and fabric job with rock on top. Along a foundation the soil under the rock has to slope away from the house, or the rock just hides a bed that holds water against the basement wall. So the bed is cleared of mulch, weeds, plastic and whatever is there, the soil is shaped to drain, and an edge is set at the lawn line so the rock stays in the bed and the mower stays out of it.
Then the fabric. A woven landscape fabric goes under every rock bed, lapped at the seams and pinned, so the rock does not sink into the soil over the years and the soil does not come up through it. Fabric is the right call under rock; it is the wrong call under mulch, which is why beds converted from mulch to rock get the old mulch scraped off before the fabric goes down. Rock is delivered and dumped or wheeled in, spread to an even depth, and pulled back from the siding so it does not sit against it.
River rock, trap rock, pea gravel, buff limestone and larger boulders each have a place: smooth river rock for a foundation bed or a dry creek line, dark trap rock for a modern look and around a patio, pea gravel under a deck. We help you pick from the supply yard by look and by what is under it.
What you supply
- The rock: type, color and size, picked at a supply yard or from a photo; we order and deliver it
- Which beds: foundation, under the deck, fence line, around the patio, or a whole conversion from mulch
- The plants that stay; rock goes around them with the fabric cut to the stem
- Sprinkler heads and low-voltage lights marked so they are not buried
What JMB supplies
- Old mulch, weeds, plastic and dead plants scraped out and hauled
- Soil graded to slope away from the foundation, low spots filled
- Steel, paver or poly edging set along the lawn line, per your choice
- Woven landscape fabric laid, lapped and pinned, cut to fit around the plants that stay
- Rock delivered by the ton, dumped or wheeled to the beds, spread to an even depth and kept off the siding
- Downspout extensions run under the rock to daylight where a downspout lands in the bed
- Walks and driveway blown clean, and photos in your job folder
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Bed area and the depth of rock, which sets the tons
- Rock type: pea gravel and trap rock vs. river rock, buff limestone or larger decorative stone
- What comes out first: a mulch bed to scrape, or an old rock bed with failed plastic to dig out and haul
- Grading needed along the foundation, and any downspouts to extend under the rock
- Edging type and length
- Access: rock dumped next to the bed vs. wheeled through a gate to the backyard
- Boulders or a dry creek bed placed by machine
- New shrubs planted in the bed at the same time
Send a photo of each bed and its length and width, and say what rock you like. We figure the tons from the area and the quote is firm.
How long it takes
Foundation beds on a typical house: one to two days. A whole yard converted from mulch to rock, or beds through a gate by wheelbarrow: two to three days.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
Rock around the foundation
A bed along the house in river rock or trap rock, graded to drain away, fabric down, edged at the lawn, with the downspouts extended under the rock. The bed most people ask for first.
Convert mulch beds to rock
Old mulch scraped off and hauled, the bed graded and fabric laid, rock spread around the plants that stay. Done right the bed does not need attention for years.
Rock under a deck
Pea gravel or river rock on fabric under a deck, where grass will not grow and mud splashes on the joists. Graded to drain away from the house and edged where it meets the lawn.
Fence line and side-yard rock
A strip along a fence or between the house and the lot line where the mower cannot get in. Fabric and rock, edged, so it is a clean strip instead of a weed strip.
Dry creek bed and boulders
A river rock channel that carries downspout or surface water across the yard, lined with fabric and edged with larger stone, with boulders set by machine. Drainage that looks like it was meant to be there.
Landscape Rock Installation — River Rock Beds and Foundation Rock: questions, answered
Is rock or mulch better around a house foundation?
Rock, in most cases. It does not wash out in a downpour, it does not break down, it does not hold moisture against the siding the way a deep mulch bed does, and it does not need redoing every two years. It costs more up front because rock is heavy to buy and move. Mulch is better around plants that want cool, moist roots, so a bed that is mostly shrubs and perennials sometimes stays mulch.
Do you put landscape fabric under rock?
Yes, under every rock bed. Without it the rock works its way into the soil over a few years and the soil comes up between the stones, and you end up buying more rock. A woven fabric lets water through, is lapped at the seams and pinned, and is cut around the plants that stay. Plastic sheeting is not the same thing; it holds water and kills the plants, and we pull it out when we find it under an old bed.
How deep should landscape rock be?
Deep enough that the fabric never shows, which depends on the size of the rock: small pea gravel covers at a shallower depth than large river rock. Deeper than that is wasted weight and money. The depth sets the tons, so we figure it from the bed area and the rock you pick, and the quote is written for that.
Can you replace mulch with rock and keep my shrubs?
Yes. The old mulch is scraped off around the plants, the soil is shaped, and the fabric is cut to fit around each stem with a gap so the plant is not choked. Rock is spread around them and kept off the stems. Plants that do not like rock, some perennials and anything that spreads, are better moved to a mulch bed, and we tell you which ones.
Does rock around the foundation cause water problems?
Rock itself does not; the grade under it does. A rock bed that sits in a low trench against the foundation holds water there just like a mulch bed would. We grade the soil under the rock to slope away from the house before the fabric goes down, and we run any downspout that lands in the bed under the rock and out past it. Done that way a rock bed sheds water better than mulch.
How do you get rock into a backyard?
If a truck can reach the bed, it is dumped next to it and raked in. If the bed is behind the house, the rock is dumped in the driveway and moved with a skid loader through a gate wide enough for it, or by wheelbarrow through a narrow one. Wheelbarrowing is the slow part of a backyard rock job and it is the main thing that moves the price on one.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 24, 2026 · JMB Builders LLC, MN license BC809005 · All landscaping pages
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