Build a wall in blocks
Wooden stakes (about 60 cm long).
An electric grinder.
A trough and a mason's trowel.
A square of mason.
A mason rule.
A spirit level.
A bucket of water.
A joint trowel.
Mounting a brick wall is certainly much simpler than building a brick wall, since it is no longer question of different types of equipment, but its design requires as much expertise to ensure the plumb and strength of construction. Before you even think about getting to the realization, think carefully about the type of blocks that you want to use and calculate the number of blocks you will need. Whatever your choice, do not forget to provide hollow bearing blocks for the load-bearing walls to allow the passage of square chaining, which are the vertical metal reinforcements poured into the foundations. Foundations that at this stage are already poured and solidified (see the sheet Designing the foundations of walls and walls).
Step 1: use and weather preparation.
The only preparation for the laying of cinderblock, except the mixing of the mortar, is to anticipate and realize in advance the different cuts of blocks to be made. It is indeed very rare that the dimensions of a wall coincide perfectly with a number of predefined blocks. To do this, use the electric grinder. Provide a bucket of water during your work will also be very useful to be able to clean your tools at any time.
In terms of adverse weather conditions when performing this type of work, rain is a major drawback. Of course, working in the rain is never very easy, but above all, this excess of moisture damages the properties of the mortar and presents a great risk of weakening the construction. It is therefore advisable to include protective covers in your equipment list. These will also be required to cover and protect the work still fresh during the night in freeze periods. Please note that the setting time of the mortar depends to a large extent on the temperature and humidity level. In case of high humidity, it is not uncommon to have to wait several days before the mortar dries completely.
Step 2: Installation of the cords.
The provisional setting up of cords is essential to start well because it makes it possible to guarantee the taking of reliable marks to draw on the ground the axes of the construction. For maximum stability, make sure to place them in the center of the foundation. To do this, plant your first peg mark in the ground by performing a simple subtraction between the found thickness of the completed foundation and the thickness of your future wall. Then proceed in the same way to position your other stakes, at a rate of two per corner of wall. This will mark the angles of the walls to come using the cords stretched between two opposite stakes. Once this installation is completed, spread in the starting axes of the walls and directly on the footing a large layer of mortar three centimeters thick. It is on this bed of mortar that you will mark your landmarks, using a trowel, and that you will put your first blocks.
The vertical use of the level is then required to indicate the location of the markings. Position it at first well aligned at the intersection of the cords, using its bubble of measurement and without deviating the cords of their trajectories. Mark the intersection markers and then move away a bit to take two more horizontal and vertical axes of the wall angle with the trowel. Then connect them to the ruler to draw the straight lines of the laying blocks.
Step 3: laying the first row of blocks.
The laying of the first row of blocks is probably the most delicate. To get it right, start by installing the corner block and then continue gradually, spacing each block regularly to make room for the future mortar joints. Push the blocks into the mortar so that they hang well and check every two or three blocks the correct horizontality of the row with the level.
Step 4: Progress of the wall in stages.
As the construction of the wall progresses, stop regularly to complete, perfect and control your work. See to:
Fill the mortar joints using the trowel to introduce and compact the mortar.
Spread a layer of vertical mortar over the blocks of the constructed row before placing any subsequent levels.
Detach the burrs from the excess mortar by cutting them flush to the wall with a trowel.
Shape the mortar joints between the blocks with a joint trowel and according to your preference.
Design and check the angle of the walls using the Mason Brace to ensure the angle is straight.
Check and adjust the horizontal and vertical plumb of the wall.