A great way to view and understand your building or repair project before you get started. Find out just about everything you need to know by watching the video below.
Building a concrete block wall is one of the more involved building projects that requires careful planning and a little heavy lifting, but easy to accomplish with QUIKRETE Mason Mix.
When working with cement-based products, always wear eye protection and waterproof gloves.
Ensure a solid footing. Footings should be a minimum of twice the width of the concrete block (i.e., a typical 8x8x16 block would require a 16-inch wide footing) and extend below the frost line.
NOTE: it is important to check local building codes for construction requirements in your area.
For load-bearing walls, tie rods should be set a minimum of 6 inches into the concrete footing before it is set. Rebar should be placed in every other masonry core to provide structural support.
For masonry cores over 4 inches wide, QUIKRETE Core Fill Grout – Course should be poured around the rebar; for masonry cores under 4 inches wide, QUIKRETE Core Fill Grout-Fine should be used.
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 8x8x16 block is actually 15-5/8 inches long and 7-5/8 inches high to accommodate the mortar joint).
Snap a chalk line on each side of the block wall as a reference line.
TIP: when preparing to place a trowel full of mortar, gently “snap” the trowel downward to remove any excess mortar. The proper consistency is achieved when the wet mortar will “hang” on a trowel held at a 90° angle.
Dampen the footing surface with water and place a one-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.
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.
Trim and remove any excess mortar.
Using the same process, set the opposite corner block.
Repeat steps 6 and 7, adjusting the blocks to be flush and level; continue this process until the first course is completed.
To set the next course of block, apply a one-inch thick mortar bed along top of the first course.
At the end of the wall, set an “8x8x8” half block into the mortar bed with the smooth side facing out.
Using a mason’s line as a guide for the remaining block, continue building the wall until it is complete.
Once the mortar joints have become “thumbprint” hard, use a jointing tool to smooth the fresh joints and remove any excess mortar.
(For Structural walls)