How to build a cinder block retaining wall on a slope

Can I use cinder block for retaining wall?

A cinder block retaining wall is only as straight and solid as the base it’s built on. … tall wall, excavate a trench deep enough to accommodate 4 to 6 in. of compacted base, 1 in. of leveling sand and half the height of the first course of blocks.

How do you build a retaining block wall?

  1. mark placement of retaining wall. Mark the Placement of the Retaining Wall. …
  2. prepare base for retaining wall. Prepare the Base. …
  3. check level and alignment of all blocks. Lay the First Course. …
  4. install drainage pipe. Install the Drainage Pipe. …
  5. fill concrete cores with crushed gravel. …
  6. top final course with capstone blocks.

What is the cheapest retaining wall block?

What is the cheapest retaining wall material?

  • Treated pine and is the least expensive material. …
  • Hardwood is more expensive than treated pine. …
  • Railway sleepers are another – slightly more expensive – option and are built to withstand ground and water contact.
  • Concrete sleepers are more expensive.

What is the easiest retaining wall to build?

While retaining walls of this type are relatively inexpensive, they can be difficult to repair or remove. For the average do-it-yourselfer, building a retaining wall is easiest when using masonry blocks that will be stacked no taller than three feet, with no mortar binding the stones or concrete members.

Does a 2 foot retaining wall need drainage?

Second, a retaining wall must have properly compacted backfill. … In order to provide proper drainage, at least 12 inches of granular backfill (gravel or a similar aggregate) should be installed directly behind the wall. Compacted native soil can be used to backfill the rest of the space behind the wall.

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How many blocks do I need for retaining wall?

To estimate how many blocks you’ll need per row, divide the total length of the wall by the length of the block. To figure out how many rows you’ll need, divide the ideal wall height by the height of the block. Make sure to account for the first row being half-buried.

How high can you stack retaining wall blocks?

four feet

How deep should a footing be for a retaining wall?

The general rule of thumb is to bury about one-eighth of the height of the wall. For example, if your wall will be three feet (36 inches) tall, the first course of blocks should start five inches below soil level. The gravel base should start three inches below this.

What do you put under retaining wall blocks?

Lay the Base

A retaining wall will be most stable if it is built over a porous base. The porous layer will help with drainage on the completed wall and will also make it easier to level the first row of blocks. Spread a 2-inch layer of sand or gravel over the area where the first row of blocks will be laid.

How long do block retaining walls last?

For a permanent wall structure, the general lifespan is generally between 50 and 100 years. This does, however, depend on the conditions of the soil and groundwater at your site.

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