Using construction adhesive secure your block caps and create the top layer of your retaining wall.
How to build a concrete block retaining wall with rebar.
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If the wall is load bearing meaning it will hold dirt or other heavy substances the tie rods should be at least 6 inches into the footing before you set the wall.
Plop the rebar in every other masonry core for solid support of the finished structure.
Spread additional mortar and lay cap block to finish the wall.
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Tie string along each stake to mark the perimeter of the footing area.
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Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
This creates 4 straight lines 1 for each side of your wall.
Mix the fill mortar slightly wetter than what you d use for joints.
When you reach the finished height of the concrete block retaining wall fill those cores containing rebar to the top with mortar.
Level to level blocks lengthwise and a torpedo level to level the front to back.
Pour the footing concrete.
Once the first row is installed pack native soil to grade level on both sides of this course to anchor the wall in place.
Tie string from stake to stake around the perimeter of the area.
Make sure they are solid and a minimum of twice the width of the concrete blocks you ve decided to build with.
As a minimum 4 rebar 1 2 inch is spaced vertically at 36 inches on center continued to within 8 inches of the top of the wall placed on the tension side the inside face of the wall.
Install the first course of blocks using a taut string line to establish a straight row.
Follow the block manufacturer s instructions for wall height limits.
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Cover the gravel between your retaining wall and landscape with topsoil or sod so your garden will grow against your wall achieving a natural look.
First approach your footings.
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Lap the additional rebar to the adjacent bar for a minimum of 18 inches and secure with tie wire.
The string will create a barrier and help you stay within the marked lines when pouring the footing.
Rebar is placed horizontally and vertically in the wall in a grid pattern.
Install the additional lengths of rebar where the vertical rebar uprights need to extend to the top of the concrete block wall.