Gas block laying by hands: first rows, features and description of technology

Aerated concrete today is one of thethe most inexpensive building materials. It makes blocks that have an impressive size and low weight. These qualities ensure easy installation, which made the aerated concrete so popular among individual builders 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

gas block laying

Laying of walls from the gas block by specialistsis 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, experts use different tools for laying the gas block, you will learn about it after reading the article.

Advice from a specialist

gas block laying by one's own hands

It is important to remember that aerated concrete is porousmaterial. Despite the fact that it is homogeneous and dense, the surface absorbs moisture well. This indicates the need to equip the cutoff waterproofing. Some inexperienced builders do not attach special importance to this issue. If this step is bypassed, 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 material today - roofing felt.

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

wall masonry from a gas block

After hardening of the foundation and strength setconcrete on its surface it is necessary to carry out leveling 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 followscontrol 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

how much is the gas block laying

Gas block laying is carried out with the help ofSpecial adhesive compounds, 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 purchased products, it should be said thatwith its use, the thickness of the seam can be only 2 mm. This indicates that there will be no 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 extreme blocks have been installed and aligned, a rope must be stretched between them to guide the master when laying the rest of the products. 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 controllocation of the upper cut in the plane of the horizon. 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 neighboring 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.

The installation of the gas block must be carried out withintervals of 2 hours between 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

gas-laying tool

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 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 rowit 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

the first row of the gas block laying

Align outer corners of the first row withusing the building level. The position can be checked using a leveling tool. Between the installed outside corners, you should stretch the cord and fill the row with blocks. The pier will facilitate the control of the masonry.

After filling the series and setting the cementsolution should be reinforced the first row. 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 the work

the first row of gas block features

Studying the features of the masonry of the first row of the gas block,you can understand that it is impossible to achieve perfect 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.

The blocks are stacked in such a way that theyslightly protruded above the socle. This parameter should force 50 mm. The zone that acts as the reference zone should not appear 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 glue "Ceresite ST-21". This recommendation is due to the fact that the composition contains water-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 notguarantee 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-block 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 in the process of work a gas block with a groove and a crest is used, then for this volume of material one glue bag will be needed. To smooth the resulting layer, use a grater.


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

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