How to build a block wall

Follow these expert tips on how to build a block wall .

Step 1

Ensure solid footing. Footings should be a minimum of twice the width of the concrete block (i.e., a typical 8 x 8 x 16 block would require a 16-inch wide footing) and extend below the frost line. Check local building codes for construction requirements in your area.

Step 2

Lay out the block, making sure to leave a 3/8 inch gap between the blocks to allow for the vertical mortar joints (i.e., a typical  8 x 8 x 16 block is actually 15-5/8 inches long and 7-5/8 inches high to accommodate the mortar joint).

Step 3

Snap a chalk line on each side of the block wall as a reference line.

Step 4

Mix the mortar. QUIKRETE pre-blended Mason Mix Type S is recommended because it achieves the high bond strengths required for a successful project. QUIKRETE Mason Mix Type S is a contractor grade mortar mix designed for laying brick, concrete masonry units and stone. Mason Mix is a pre-blended, sanded product that can be used for both structural and non-structural applications.

Step 5

Dampen the footing surface with water and place a 1-inch bed of mortar on the footing. Furrow the mortar bed using the tip of the trowel to create a “v” to help distribute the mortar evenly. The mortar should be workable but firm enough to support the weight of the block.

Paso 6

Butter the inside end of the first block and then press the block into the mortar bed to create a 3/8 inch mortar joint.

Step 7

Trim and remove any excess mortar.

Step 8

Using the same process, set the opposite corner block.

Step 9

Repeat steps 6 and 7, adjusting the blocks to be flush and level. Continue this process until the first course is completed.

Step 10

To set the next course of block, apply a 1-inch thick mortar bed along the top of the first course.

Step 11

At the end of the wall, set an 8 x 8 x 16 half block into the mortar bed with the smooth side facing out.

Step 12

Using a mason’s line as a guide for the remaining block, continue building the wall until it is complete.

Step 13

Once the mortar joints have become “thumbprint” hard, use a jointing tool to smooth the fresh joints and remove any excess mortar.

For more information on how to build a block wall , visit www.quikrete.com.