Gas block laying by one's own hands: first rows, features and description of technology

Aerated concrete today is one of the most inexpensive building materials. It is made of blocks that have an impressive size and low weight. These qualities ensure easy installation, which made gas concrete so popular among individual developers and professionals. If you, too, decided to use aerated concrete, then it is worth firstly familiarizing yourself with the technology of its masonry. Only in this case you will be able to achieve high quality work.

Recommendations for masonry

Wall masonry from a gas block by specialists is carried out only after the products are further processed. For this, a special plane is used. This recommendation is due to the fact that the specificity of the production of the material described assumes that there is a tolerance in dimensions along the faces. In general, specialists use different tools for laying the gas block, you will learn about this after reading the article.

Advice from a specialist

It is important to remember that aerated concrete is a porous material. Despite the fact that it is homogeneous and dense, the surface absorbs moisture well. This indicates the need to equip the shutoff waterproofing. Some inexperienced builders do not attach special importance to this issue. If this step is bypassed, the moisture will penetrate from below, moving along the wall and rising to the level of the third floor. To do this, it is usually used cheap and common today - roofing material.

However, it is necessary to take into account the period of its operation. Even under the most favorable conditions, it is 5 years. Therefore, the best option will be a moisture repellent film. Laying the gas block with their own hands is better done using products whose sides have recesses in the form of thorns and grooves. Such blocks can be fitted to each other sufficiently tightly, which will ensure the strength of the structure.

Preparation before commencement of masonry

After the foundation is hardened and concrete strength is set on its surface, it is necessary to perform an equalizing screed. The solution for it is prepared from cement and sand. With the help of this composition it will be possible to eliminate the mismatch in height, which could cause uneven walls.

The horizontality of all parts of the tape should be controlled by the building level. On top of the waterproofing material. Preliminary it should be cut into strips, the width of which will be somewhat larger in comparison with the foundation. On each side the material should hang 10 cm.

Recommendations for laying

Laying of the gas block is carried out with the help of special adhesives, which are presented for sale in the form of dry mixtures. But some masters prefer to use the traditional mortar, which is closed in the ratio of 1 to 3.

In favor of the purchased products, it should be said that with its use, the thickness of the seam can be only 2 mm. This indicates that there will not be bridges of cold in the wall. In addition, this method of fastening blocks reduces installation time. To dilute the glue, no additional space is required. But for the solution it will be necessary to deliver cement and sand, not to mention the formation of dirt and dust on the site.

Begin the laying of the gas block from the corners. Once the end blocks are installed and aligned, a rope must be stretched between them to guide the wizard when laying the rest of the items. In order that it does not sag, you should apply a kapron cord or fishing line. For a more reliable coupling between the bricks, the side faces, spikes and grooves are treated with glue.

When laying the first row, it is important to control the location of the top cut in the horizon plane. If necessary, you can perform block processing with the help of a plane. The second level is built on the same principle. However, it is important to take into account that joints in adjacent vertical rows should not coincide. In this connection, the first corner block should be cut in half. Through the level will be located half of the block, while in the next row - a single piece.

Laying of the gas block should be done at intervals of 2 hours between the rows. So the adhesive will grasp well. Therefore, it must be bred for one level. Under the windows and doors you need to leave blank spaces. Before installing the next row of blocks in the level, these places are further strengthened. Above the apertures for this are installed jumpers from the bars of the armature. They must be in the cut grooves. On the wall, they should be wound 20 cm from each side of the opening.

Features of the first row masonry

On whether the first row will be correctly laid, the accuracy of the geometry of the entire structure depends. If you did everything right, then the subsequent ranks can be built much faster. Laying of the gas block in the first row should be carried out on a cement-sand mortar. This will smooth out the level changes. A water-retaining substance should be added to the solution, while the composition is applied by the trowel. The additive will prevent the rapid absorption of moisture by the material, because it is known that for the strength set the solution should not quickly lose moisture.

Begin work on laying the first row is necessary from the highest point of the basement. If you have purchased blocks with grooves and ridges, then the products should be positioned so that the ridges are outward. This will facilitate the finishing work. As practice shows, polishing dowels is much easier than filling them with a plaster mix. Once the aerated concrete block can be installed, check its level and correct it with a rubber hammer if necessary. Usual can not be used, as it will damage the surface.

Description of the technology

Align the outer corners of the first row with a building level. The position can be verified by means of a level. Between the set external angles, you should stretch the cord and fill the row with blocks. The pier will facilitate the control of the masonry.

After filling the row and setting the cement slurry, reinforcement of the first row should be performed. There is an opinion that this stage can be bypassed, because the blocks are laid on the foundation. Some do just that, it saves money, but as a result, cracks appear on the bearing walls.

Features of work

Studying the features of the first row of the gas block, you can understand that it is impossible to achieve an ideal alignment of products in the corners of the building. However, it is important to ensure that the difference in height of individual angles does not exceed 3 cm.

Blocks are stacked so that they protrude slightly above the plinth. This parameter should force 50 mm. The zone that acts as the reference zone should not appear to be below the calculated one. This zone is the perimeter of the block, which is in contact with the foundation. For laying the next first rows, experts recommend using the adhesive "Ceresite CT-21". This recommendation is due to the fact that the composition contains moisture-retaining additives. It does not freeze for an hour. Such a mixture is quite expensive, but it justifies the high price. For the above mentioned time, the master will have the opportunity to correct the defects made during the laying.

By purchasing cheap glue, you can not guarantee a successful outcome. Pulling the cord, you should strengthen it between the beacon blocks. If the distance between them is quite large, then in the center should install another intermediate product, which will eliminate the sagging cord. From the evenness of the first row of the gas-laying masonry, not only the stability and reliability of the building depends, but also the consumption of adhesive composition. It is important to follow the standard, which states that about 1.2 bags of dry mix should go to the cubic meter of the unit. If a gas block with a groove and a crest is used in the process of work, then one glue bag will be needed for this volume of material. To smooth the resulting layer, use a grater.

Conclusion

Home craftsmen who do not have experience in carrying out the works described in the article quite often wonder about the cost of the gas block laying. Pay for the cubic meter of the gas-block masonry with the paso-block system will have 1100 rubles. minimum. The maximum price reaches 2700 rubles. If in the work you plan to use a flat gas block, the minimum price per cubic meter of masonry will be 1200 rubles, while the maximum price is 2800 rubles.