When building a house from foam blocks is carried out, professionals recommend the use of special compounds that are close to this material in density. The consumption of glue is very economical, the mixture quickly sets and allows you to create a monolithic integrity of the walls. The sound and heat-insulating qualities of the house, as well as its strength, largely depend on the properties of the connecting solution.
How to choose the best glue, taking into account the composition
Before choosing an adhesive for foam blocks, you should take a closer look at the ingredient composition. For preparation, many components are used, among which Portland cement should be highlighted. If it acts as a bonding base, then the hardening of the solution will occur rather quickly.
You can set the joint thickness to 3 millimeters or less using glue based on fine quartz sand. Glue for foam blocks should contain modifiers that help retain moisture and do not allow joints to become cracked. Plasticity manufacturers are able to achieve thanks to polymer powders, which provide high-quality filling of all cavities. Using these formulations, an increase in adhesion between blocks can be achieved.
How to choose glue taking into account the conditions of work
Glue for foam blocks can be designed for masonry in winter or summer. The first version of the composition is gray and is used for manipulations at temperatures from +5 to -10 Λ. Antifreeze components are added to the ingredient composition, while the temperature of the solution remains positive. To do this, water should be heated to 60 Β° C.
It is recommended to use such adhesive for foam blocks within half an hour after mixing. The mixture may be summer, white cement is added to it. The effectiveness of the composition is maintained at a temperature of +5 to +30 Λ.
Glue consumption
The consumption of adhesive for foam blocks can vary depending on the composition and thickness of the seam. In order to achieve a strong bond with cement mortar, the layer thickness should be between 6 and 8 mm. At the same time, 0.1 cubic meter of composition will be needed per 1 cubic meter of masonry. Cold bridges are often formed in the seam zone, which leads to the need for the formation of a second row of foam blocks. This allows you to increase the thermal insulation characteristics of the building.
The consumption of glue for foam blocks per 1 m 3 can be about 16-20 kg, if you use special mixtures. The final figure will depend on the accuracy of the geometry of the products, as well as compliance with the thickness of the seams. The last parameter should not be more than 3 mm. In difficult places, the seam thickness can be increased up to 7 mm.
Choosing the best glue from different manufacturers
When choosing glue, you should not focus only on cost, since this, on the contrary, can lead to unnecessary costs. If you choose products from little-known manufacturers, you may encounter the fact that the mixture will have low adhesive and penetrating characteristics, and the flow rate will increase. As a result, you will get unreliable masonry and poor quality insulation.
Choosing products from more well-known brands, you can facilitate the installation of foam blocks and spend less glue. Below are prices for the most popular brands of glue for foam concrete blocks.
Most popular solutions
If you want to buy the best adhesive for foam blocks, you should pay attention to Ceresit CT 21. This brand is the most popular. For a 25-kilogram bag you will have to pay one of the highest prices - 265 rubles. A little more expensive is the winter version of Praktik Bergauf, you will get it for 274 rubles. One step lower in cost - composition from the manufacturer "Creps". For the bag you have to pay 199 rubles. 179 rub glue Aeroc, while the summer Praktik Bergauf will cost 165 rubles. per 30 kg bag.
EURO glue consumption from the producer "Titan"
Glue "Titan" for foam blocks is intended for the construction of partitions and load-bearing walls using high-precision building materials. Application temperature varies from -10 to +30 Λ. You can correct the product after applying glue within 3 minutes. A cylinder will be enough for 60 linear meters. The material belongs to the F / B3 fire resistance class.
The composition has a light gray color and does not adhere to the following materials:
- polyethylene;
- Teflon
- polypropylene;
- silicone;
- polyamide.
If you are faced with the question of which adhesive for foam blocks to choose, you should consider the characteristics of several options at once. For the composition described in this section, the flow rate can vary from 1.1 to 2.7 cylinders per cubic meter. It all depends on how many strips of glue you apply.
Features of installing drywall on the foam block
If you need to level the wall, you can lay drywall on the foam blocks, this material is mounted on glue quite simply. First you need to prepare the surface, for this the plane is cleaned of old coatings. The base must be leveled. Then a primer layer is applied to increase the adhesion of the composition to the surface.
The wall can be dampened for greater reliability. Next is the preparation of the material. Before installing drywall on the sheets, through holes are made. Their location should be as follows: two holes on the top edge, the same number on the bottom. About 3 or 4 - in the central part of the canvas. Pieces of foam are glued near the holes. After this, wait for the glue to dry.
Now you can do the installation of sheets. But first, the sheets are applied to the wall to make marks for the holes for the dowels. After installing the fasteners GKL is applied to the wall and fixed with screws. Around each self-tapping screw it is necessary to drill holes with a diameter of 6 mm.
Polyurethane foam or adhesive foam is pumped inside to fix the drywall to the foam block. The most reliable and easiest option for wall decoration from the inside is to install drywall on the glue. Sheets can also be installed on the frame.
Masonry foam blocks
How to put foam blocks on glue? This question is asked by many novice home masters. If you are among them, you should familiarize yourself with the technology below. The surface of the masonry layer should be leveled with a grater or mortar, and then cleaned with a brush of foreign particles and residues after grinding. If the work is carried out on a foundation, waterproofing is laid on top. The first layer must be laid on a substrate of cement-lime mortar.
The first product is placed on the prepared mixture. It is important to keep an ideal level. A solution layer is applied to the cleaned surface, the thickness of which can reach 3 mm. It is necessary to use a spatula corresponding to the width of the walls.
When laying on a thin-layer solution, the blocks are not sprayed with water. The control of the location of elements in the corners and along the walls must be checked with a cord and level. The unevenness of the masonry elements should be corrected with a rubber mallet.
Before plastering the surface, potholes and damage are filled with mortar. Such errors may appear during masonry. Thanks to the use of glue solution and special tools for applying glue, you can reduce the time and consumption of the mixture. Thin seams will help reduce heat loss.
Mastics can act as special glue. Many people wonder why to apply the mixture on the entire surface of the foam block, which is quite wide. You can decide that you can limit yourself to applying glue only to the edges of the product, leaving the middle without a solution. There is no definite answer to this question. The horizontal layer of glue on the blocks must be continuous and cover the entire surface, otherwise the load on the edges of the blocks will increase, which will cause a decrease in the stability of the wall. Thermal insulation characteristics can also become worse.
Reinforcement of vertical joints
Having looked at the lateral surfaces of the foam blocks, you can see the locks in the groove-comb type, which ensure a tight fit of the products to each other. It is also necessary for the distribution of horizontal loads. No matter how thin the seams are, this can reduce the thermal insulation performance. Depending on what type of finish will be used, the issue of strengthening vertical seams can be solved in different ways. If the wall will be plastered in a continuous layer, then the vertical surfaces of the blocks do not stick together.
When the plaster is applied only on one side of the wall, on the opposite, the vertical joints are only half filled with glue to prevent heat leakage or the penetration of cold air into the room. When the load on the walls is approximately 70% of the strength of the foam block or it is necessary to give the structure additional resistance to external loads, the vertical joints must be completely filled with glue. It is important to eliminate voids.
Finally
The foam blocks have almost perfect geometric characteristics, which means that they can be laid on glue, with the help of which the joints are minimized in thickness. Start laying from the corners, while dressing the rows is done in the usual way.
In some cases, a part of the block is inserted in the middle of the wall, in which case special attention should be paid to securing it. To do this, the side surfaces are lubricated with mastic, and the adhesive joints are completely filled. Additionally, sometimes masonry reinforcement is also carried out. In order to reduce the consumption of glue, products with grooves for fittings should be used in this case.
When reinforcing, glue fills the entire space of the stroba after laying the rod. In the corners the rod should be bent. It is important in this place to ensure the overlap of the reinforcement, otherwise there will be no effect from the reinforcement.