Interstate Rock Products (435) 635-2628

Precast Concrete

Our precast division makes precision-manufactured concrete products, from utility structures to custom pieces, made to streamline installation.

That includes Redi-Rock: large precast concrete blocks in textures like Ledgestone and Cobblestone, stacked into retaining walls.

Call the main office to talk through a precast piece, a Redi-Rock wall or a delivery.

Redi-Rock retaining walls we've built

An excavator lifting a precast concrete box at sunset

How it gets built

How a Redi-Rock Wall Gets Built

A Redi-Rock wall holds a hill back with sheer weight: big precast blocks, stacked so they lean into the slope.

GROUNDIN FRONTSLOPEBEFORECUT BACKFOR ROOM1PERFORATEDDRAIN PIPE4LEVELING PAD,COMPACTED2FIRST COURSE,SET DEAD LEVEL3EACH COURSESTEPS BACKDRAIN ROCK+ COMPACTED FILL5GEOGRID LAYERSON TALLER WALLS6CAP BLOCKSFINISH GRADE,DRAINS AWAY7GRAVITY BLOCK WALL · TYPICAL CUTAWAYTYPICAL · NOT TO SCALE

  1. Dig Out the Base

    We excavate for the wall and cut the slope back behind it, leaving room for drain rock and fill.

  2. Leveling Pad

    A pad of crushed gravel is compacted and set dead level. If the base is level, the wall will be.

  3. First Course

    The first row of blocks is set on the pad, partly below the ground, and checked for line and level.

  4. Drain Rock and Pipe

    A perforated drain pipe runs along the back of the wall in clean drain rock, so water gets out instead of pushing on the wall.

  5. Stack the Courses

    Each block locks onto the row below and steps back a little, so the wall leans into the hill. The fill behind is compacted as it goes up.

  6. Geogrid on Taller Walls

    Taller walls get layers of geogrid between courses, rolled back into the compacted fill to tie wall and soil together.

  7. Cap and Finish Grade

    Cap blocks go on top, then the ground is finished above and below the wall so water drains away from it.

On the Job

Tell Us About Your Project.

(435) 635-2628

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