If 4 wheelbarrow of sand was mixed with a bag of cement to lay about 100 blocks it means that the total number of blocks for the building would be divided into 100 blocks and the result is multiplied by 4, to give the total number of wheelbarrow of sand needed to raise all the walls of the building. Though most builders do not measure the quantity of sand required for raising the walls of the building due to the fact that it is readily available and cost less than other building materials, but for the purpose of economics management in building it becomes necessary to know the actual quantity of sand needed for the raising of the entire walls of the building. So the keyword is that the taller the building the more the sequential arrangement of blocks according to the inches to attain the height, the raising of walls will always start from bigger inches blocks to the smallest in respect to the height from the floor to the roof.ДЄ situation where the building is not an upstairs may be a bungalow or a simple duplex that the total height does not exceed 30 feet the walls of the building may be raised by 9inch or 6inch blocks depending on the money available with the builder and the quality of building the individual wants to achieve.ДЄ good block layer can estimate accurately the number of blocks that can be laid on the building walls per a bag of cement, this number of blocks are used to divide the total number of blocks calculated for the entire building walls to give you the total number of the bags of cement required to lay all the blocks on the building walls. If a building is to have multiple floors over one another such as upstairs of one or two stories, the initial floor which constitutes the foundation of the building may have its walls laid by 12inch blocks, while the second floor which is referred to as the decking of the upstairs may have its wall raised with 9inch block, and so forth. Just as earlier mentioned the thickness of the blocks needed in a building depends on the overall height of the building. Take the measurement of each walls length and height and calculate it by the simple formula for AREA=length x breadth assuming the value for a particular wall is length 20feet and height 15feet then the number of blocks needed to erect such wall will be (20 X 15)/(1 X 2)= 300/2=150 blocks required for that wall, do this to all the walls in the design and sum up the total to get an accurate number of blocks you will need for your building project and then consider which size of the block thickness you may need ranging from the 5inch to 12inch and obtain the price of each from block molding industries, for example, if 5inch block is sold for N100 per block, then the price of blocks needed for the wall calculated above is N100 x 150= N15, 000. (0.42 feet to 1 feet), so with this we can obtain the total number of blocks needed to erect the entire walls below is the procedure to take: The standard height of every building should be between 12feet to 15 feet height, and every block is made with 1 feet height and 2 feet breadth, while its widths ranges from 5inches up to 12 inches i.e. If the total walls for a three bedroom flat are 15 walls altogether. The number of the walls will determine how many blocks that will be needed to erect all the walls altogether. Check the design of the building check how many walls that the building would have, walls means the places blocks will be raised to make up the entire building.

House building estimate