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Large interlocking concrete blocks stacked into a wall on a job site

Service-disabled veteran-owned · Thousand Palms, California

Concrete retaining wall blocks, built to hold and shipped nationwide.

Detachment 5 Block supplies heavy interlocking concrete retaining wall blocks for walls, storage bays and barriers. They stack without mortar, arrive by the truckload, and come from a veteran-owned team that answers its own phone.

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A large precast concrete block with interlocking keys on top

Mass is the method

A wall holds when the block outweighs the load.

Soil pushes every day, rain adds weight behind the wall, and the ground moves with the seasons. Our blocks answer with mass and a mechanical lock, not glue and hope.

Compare every block

  1. 01

    Weight that stays put

    From about 1,000 lb to 4,800 lb per unit, so the wall resists sliding and leaning under load.

  2. 02

    A lock in every course

    Raised keys seat into the course below, so long runs stay straight without shims or mortar.

  3. 03

    Made for freeze and thaw

    Dense concrete rated up to 4,000+ PSI stands up to water, heat and cold, year after year.

Build the wall once.

  • No mortar to mix.
  • No cure time to wait out.
  • No crew of masons to schedule.

A machine sets each block, the interlock lines it up, and the next course goes on top. Walls go up in days, and the blocks can be lifted out and reused if the site changes.

How interlocking blocks work

Five block lines, one interlocking system

Each line is made for a different job, from multi-ton barrier blocks to stone-faced units for a front yard.

Walls · Bays · Barriers

Large Concrete Blocks

Multi-ton units, often called mafia or bin blocks, for commercial walls, embankments and storage bays.

2′ x 2′ x 3′ up to 2′ x 2′ x 6′

Bins · Perimeters

Barrier & Bin Blocks

Three standard sizes for material bins, site perimeters and gravity walls, delivered by the truckload.

About 8–30 blocks per load

Heavy civil · Flood control

V-Lock Concrete Blocks

A V-shaped interlock for gravity walls, aggregate bays and flood barriers on public works.

2′ x 2′ x 6′ standard unit

Yards · Gardens

Landscaping Blocks

85 to 125 lb units in Rock Face, Brick Finish and Stacked Stone, for walls people see every day.

Rated 4,000+ PSI

Compare all five lines, including interlocking blocks

Veteran-owned, and run like a mission

Detachment 5 Block is a service-disabled veteran-owned business based in Thousand Palms, California, established in 2017. The habits come with the background: show up when you said you would, say what you mean, and finish the job.

Every order is planned before a truck rolls, so the crew on site gets the same block on the last load as on the first.

Read our story

A curved concrete retaining structure above a highway

Veteran-owned. American-made. Shipped to every state.

Three ways to begin

Start wherever you are in the project.

Request a quote

Send the wall size, block type and delivery address. You get a price and a truckload plan.

What to send

Call the team

Talk to someone who knows the blocks and can price the job on the first call.

Call 844-BLOCKS-5

Compare the blocks

See every size, weight and best use side by side before you decide.

Compare all blocks

Questions contractors ask

What are concrete retaining wall blocks used for?

They hold back soil, handle changes in grade and create usable flat ground. Common jobs include slope stabilization, erosion control, terraced landscapes, commercial and infrastructure walls, plus bulk storage bays on farms and industrial yards.

How strong are your retaining wall blocks?

Our large blocks are made from 2,500 to 4,000 PSI concrete depending on the mix, and our landscaping units are rated at 4,000+ PSI. Strength on paper matters, but so does the interlock, which spreads load across the whole wall.

Do I need mortar to build a block retaining wall?

No. The blocks interlock and are held in place by their own weight, so there is no mortar or adhesive. That saves labor and lets the wall flex slightly with ground movement instead of cracking.

How long does a concrete block retaining wall last?

Decades, when it sits on a well-prepared base with good drainage. The blocks themselves are made to resist weather, moisture and freeze-thaw cycles.

What is the difference between retaining wall blocks and bricks?

Blocks are larger structural units made to carry load. Bricks are smaller and mostly decorative, and they usually need mortar and more labor. For structural or large walls, blocks are faster and more reliable.

Can these blocks be used on commercial or DOT projects?

Yes. They are used on commercial, industrial and infrastructure walls. For DOT or other engineered walls, have the project engineer review the specs for your site before ordering.

Do you sell wholesale concrete blocks?

Yes. We supply bulk and wholesale orders to contractors, developers and large projects, including multi-load orders for phased builds.

Do you ship nationwide?

Yes. We coordinate delivery to job sites across the United States and match each order to the closest production facility to keep freight costs down.

Concrete blocks being set on a job site

How an order begins

Every order starts with a short conversation about the wall: how long, how tall, what it holds and where it goes. From there we price the blocks, plan the loads and set a delivery date.

Request a QuoteCall 844-BLOCKS-5