To build a cinder block wall start by digging a hole for the foundation and reinforcing it by placing steel rebar into each corner. Allow the mortar to dry for three days. Mix 1 cup of borax with 1 gallon of hot water.
Offset the blocks so each block above the first layer rests on top of two blocks below.
How to build a cinder block basement. Using your masonry brush dip into the paint and stroke in any direction on the wall covering the wall completely with paint including all crevices in the block. Set that block in place along the marked line and level it with a level. And maintain a standard 38 inch thick joint. Building the walls block basement walls should be built on concrete or concrete block footings placed on firm undisturbed soil below the frost line.
Use type m or type s mortar astm c 270. Additionally strike the joints of the blocks with a rubber mallet. Keeping the basement dry the wall itself should be dampproofed by parging grout coating or asphalt coating the outside surface. Composite sheet membranes synthetic rubber sheet membranes butyl rubber epdm or neoprene.
A row of blocks is called a course. It is optional to stagger the pattern of blocks because you will be filling the spaces in the blocks with cement to give the walls added strength. Spread mortar along the sides of each block before placing it next to another block in each course. Allow the first coat to dry 12 hours.
Tool all the joints concave. Continue stacking the blocks in rows making sure to stagger them with each row to make the wall as sturdy as possible. Then attach the first row of cinder blocks to the concrete with mortar to build the base of your wall. Once dry the borax residue continues to.
Next fill the hole with concrete and let it dry overnight. Use a level to keep layers plumb and level. Use a masonry paint brush to apply the first coat of sundry or drylok paint to the cinder block walls. Lay cinder blocks to form walls on all four sides.
This paint will go on much thicker than standard wall paint. Spray on the walls to weight down the mold or mildew spores scrub then wipe to remove loosened debris. Repeat laying blocks until the height you wanted is reached. Mix mortar in a large container from a prepared mix and spread it on the sides and ends of a block using a trowel.
Add other blocks along and on top to make a wall. Press each block into place in each row.
