Hollow (TBB) and double (PBB) blocks can be used:
1. For base foundations.
2. For outside buildings walls.
3. For partitions walls.
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 Hollow concrete block is widely used and economic construction material. Blocks, 140 mm and 240 mm thick, can be used in building dwelling-houses, public, industrial and other buildings. Due exact geometric measurements and good surface, the expenses of wall mounting are less.
The blocks can be used for mounting: walls, outside maintain or non-maintain walls, inside partitions and so forth. In particularly the blocks are suitable when the outside wall makes the function of a bearing wall. In such case there is a possibility to additionally strengthen wall construction by reinforcing it vertically or horizontally and filling its openings.
 Hollow concrete blocks compared with other wall material have some advantages:
- product weight - 140 mm concrete block weights only 10 ÷12kg.
- wall width: dwelling-house wall from 140 mm thick hollow concrete blocks with warming material can be 360 mm width. It correspond STR requirements when heat resistance has to be R≥5,0.
- in relation to decrease in wall thickness, the useful space of building can be increased to 15%
- the cost price of wall in relation to the price and thickness of blocks is less than using other wall materials.
- in relation to the external surface of high quality, the expenses for inner wall decoration are less.
- in relation to a small space of bricked surface, the input of masonry solution is less.
 Bricklaying using concrete blocks does not differ from traditional bricklaying. It is very important to eliminate all roughness of the foundation when laying the thirst line. In such case, seams no bigger than 10 mm will be needed for further bricklaying. It could be necessary to change the dimensions of bricks when bricklaying. In such case, a block with additional splits is in each pallet (the bricks can be spilt easier).
Before the masonry wall on the foundation must be laid a layer of paper. The walls of concrete blocks can be easily plastered, paited, decorated by bricks, planted by sidings etc.
 In order to avoid openings when mounting maintain walls, it is recommended to make horizontal reinforced seams, no less than one reinforced seam for one linear meter upwards. Armature networks in joints have to be laid no less than by 30 cm.
The plants of construction wall warming are calculated by deducing thermal transfer coefficient. Thermal resistance R is calculated by dividing one by the aforementioned coefficient U.
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