The use of natural stone for finishing the facades of buildings for various purposes is a fashionable trend among numerous developers, and architects also recommend this option for decorating houses. New technology allows to have modern insulated facade walls in retro style. In addition, in terms of its physical properties of strength, natural stone is rightfully considered one of the most durable materials.
Natural stone glue for outdoor use
Facade decoration with natural stone
The decoration of external walls is operated in the most unfavorable conditions under the constant influence of atmospheric precipitation, with a cyclical change of positive and negative temperatures. Such conditions require increased attention during the selection of the glue; it must not only have a high coefficient of adhesion to building materials, but also not change its original properties during the entire period of operation.
Professionals do not recommend using universal compositions; in terms of moisture resistance and frost resistance, they cannot fully satisfy construction requirements. This is especially true of the northern regions of our country, where the most difficult operating conditions are, not all trains can withstand them.
It is important to choose the right adhesive composition for the stone
When choosing a specific brand, special attention is paid to the manufacturing country, the northern countries, in contrast from southern ones, they take into account the frost resistance factor to the maximum extent and produce adapted adhesives. At present, domestic companies have mastered the technology for the production of high-quality compounds; in many respects, they are almost not inferior to imported analogues. Unfortunately, it cannot be said that the cost of domestic products is much lower than imported ones.
In the absence of healthy competition, some of them unreasonably overcharge their goods.
Stone glue must be frost-resistant
Depending on the main component, adhesives are divided into two large groups.
The adhesive compensates for changes in the linear dimensions of natural stones due to thermal expansion. Strength increases significantly, microcracks do not appear, the growth of mosses and lichens is inhibited in the seams.Due to the high cost, epoxy adhesives are most often used only for grouting or during the repair of a fallen stone. Can be used for finishing fountains, outdoor pools, decorative elements of the facade, etc.
Two-component stone glue
Laying the second requires much more time to fit individual elements in size and configuration. Quite often, natural stones have to be cut or chipped, and this is an additional waste of time. In connection with such features of finishing with natural stones, the time of using the glue takes an important place. The larger it is, the quieter the work is. Remember that after the start of the polymerization of two-component adhesives, this process cannot be stopped; unused expensive glue will have to be thrown away.
Decorating the facade of the house with stone
We will focus only on the most important criteria, we accept the average option in terms of quality and price. Make a specific decision yourself, taking into account the characteristics and measurements of natural stone, the place of its installation, the material for making the facade walls and the climatic zone of residence.
The time for using the ready-made solution is limited
The fact is that 35 cycles does not mean 35 years, during one winter or year the temperature can change several times from plus to minus and vice versa.
Choose an adhesive with a frost resistance index of at least 35 cycles
Carefully read the manufacturer's instructions, choose products only tested by numerous consumers companies. Never buy counterfeit products, do not be seduced by a low price. The cost of unavoidable facade repairs is several orders of magnitude higher than the amount of savings.
Such problems arise due to the inattention of the master or violation of the rules for transporting materials.
It is a pity to throw away the stove, but it is impossible to install a stone with broken corners. You can try to glue parts of the stone separately on an ordinary composition. If you have extensive experience in performing such work, then you can count on a positive result. If not, then it's best not to try.
Today, there are special, particularly strong and fast-drying adhesives for the repair of stone slabs in the implementation.
They are made on a polyester base and set in just a few minutes. One of the best quality brands is Bellinzoni MASTICE 2000.
Bellinzoni MASTICE 2000
The most used brands of glue for natural stone for outdoor use
|Name||Brief description of operational characteristics||Approximate cost of a bag weighing 25 kg (rub.)|
Knauf Flizen plus (36)
| For natural and artificial stone, can be used for interior and exterior wall cladding. It is allowed to work only at positive temperatures.
Cement-based, has high adhesion rates.
Knauf Flisen (100)
|For gluing thin-walled stone tiles with dimensions of 30 * 30 cm or more.||245|
| For pasting facade walls and plinths with natural stone tiles, waterproof, frost-resistant. High adhesion rates make it possible to lay tiles from top to bottom - the work of the tiler is accelerated. Suitable for sealing joints.
Ceresit CM14 Extra
|But based on cement, withstands a large weight of finishing materials.||260
Professional Quick Stone
|Indicators of adhesion to concrete not less than 0.5 MPa, frost resistance 75 cycles, can be operated in the range from -50 ° C to + 70 ° C. Per square meter of surface, depending on its condition, 5-15 kg of ready-made glue is required.||247|
| Increased adhesion with concrete up to 1.
5 MPa allows the use of glue when facing facade walls with heavy natural stones up to 2000 cm2. Frost resistance 50 cycles.Classification of the adhesive according to EN 12004 - C2TE. Once prepared, it can be used within four hours.
LITOKOL LITOELASTIC A + B
| Two-component for natural stone cladding on horizontal and vertical surfaces. |
Consists of epoxy-polyurethane resins, organic additives and inert fillers. An organic base with fibers is used as a catalyst. Very expensive and high quality glue, used only for decoration of the most prestigious buildings. It can be used for finishing facade walls made of any materials, including metal surfaces.
| 3274 rub. |
|Withstands natural stone of large mass, it is used for finishing entrance groups, fences, facades and plinths. Can be used on brick and concrete bearing surfaces.||370|
|Special for marble, has high adhesion to concrete and brick, can support slab weight up to 40 kg / m2.||375|
| For outdoor and interior work, withstands at least 40 freeze / thaw cycles. Consumption depending on the condition of the surfaces up to 5 kg / m2.
| Material manufacturing of front walls - brick, concrete. |
Made on the basis of cement, water and frost resistant.
Allows you to correct the spatial position of
tiles 20 minutes after gluing
If possible, purchase adhesives with high levels of thixotropy - the ability to hold the tile in a vertical position without displacement. This quality greatly facilitates the process of wall cladding with natural stone, minimizes the risks of technological errors during the production of work.
List of well-known companies
Currently there are a large number of manufacturers but not all of them live up to consumer confidence.
Unfortunately, even the high price of a product does not guarantee its quality. Which brands can you trust?
Recommended for use on surfaces with risks of seasonal deformation.
Polyurethane adhesive for tiles and stones Keralastic T
A dry mix of high quality cement, sifted river sand and modified additives. It is diluted with water and has high frost resistance. It can be used for laying natural stone both outdoors and indoors.
It can be used in regions with long and cold winters, the presence of a small amount of synthetic resins gives the adhesive elasticity - the thermal linear expansion of natural stone is compensated.
Our list is far from complete, before making the final choice, consult the seller-consultant.
The dependence of the glue on the type of stone is essential, this must be taken into account when choosing a particular brand. Which glue is best for which stone?
|Name of the stone||Brief characteristics of the stone||Recommended glue|
| One of the heaviest stones used for exterior work. It is expensive, the stone is hard to work with, it often crumbles during cutting. |
Only the most experienced craftsmen can cover facade mills with granite.
|Two-component adhesives with high adhesion values. For horizontal surfaces, it is allowed to use cement-based compounds.|
| Has different colors and patterns, significantly inferior in strength granite. There are significant limestone inclusions. |
|Two-component cement-based adhesives and formulations with the obligatory presence of innovative additives.|
|The stone has average indicators in all parameters, is widely used for finishing facades of a budget option.||Dry mixes based on cement of a cheap cost spectrum.|
|A common stone, used not only for facades, but also for finishing design elements of the adjacent territory.|| Cement mixes of the middle price category.
The stone is characterized by excellent technological performance; there is no need to use expensive adhesives.
|Has a low weight and density. Disadvantage - it crumbles quickly, absorbs a large amount of moisture.|| Dry mixes with increased strength and adhesion. During finishing, the building rules must be followed exactly.
Glue Basin Maxiplix
The reliability of surface finishing with natural stone depends on several components: the quality of surface and stone preparation, the type of glue and adherence to the recommended technology. What rules are recommended to follow?
The glue in the package can be stored in a place protected from moisture for 6 months
It is best to use an electric mixer for mixing. If not, then when stirring with a trowel, reduce the volume of single portions. Stirring must be done in two stages, after the first one, let the glue infuse for 5-6 minutes and stir again. This will minimize the amount of dry lumps.
Glue preparation steps
Stir the glue if it starts to harden
Natural stone is one of the most expensive finishing materials. Any defect during the production of work leads to significant material losses, do not allow them.
Be sure to prime the surfaces.
The primer performs several tasks simultaneously:
Due to impregnation, it is possible to increase the reliability of fixation of heavy slabs made of natural stone.
Clean the surfaces of walls and stones from dirt and dust. If the stones are very dirty, it is recommended to wash them.
Before gluing, run your hand over the stone and wall, if sand remains on your hand, then you need to continue preparing the surfaces.
Cleaning the walls of the house
Dilute as much glue as you can use within two to three hours. Reduce the first portion in volume, in the future the amount of glue will be determined empirically.
The finishing stone is very heavy, take every precaution for a secure adhesion. The adhesive must be in contact with the entire surface of the stone and the bearing wall.
If during the laying of ceramic tiles the surfaces may have gaps, then in the case of a stone this is not allowed. Apply the adhesive to the wall only with a comb trowel and at least twice in perpendicular directions.
Applying the solution to the wall
If the work is carried out in hot dry weather, it is recommended to wet the back of the stones. Use brushes or a spray bottle. By the way, about thirty years ago, the craftsmen planted natural stone on an ordinary cement-sand mortar, and it still holds.
To increase the adhesion strength, they dipped each tile into a container with water, due to this they achieved the strength of the connection of the solution with the stone.
Pay particular attention to gluing seams. For tiles, grout performs only a decorative function, and for stones, it also increases the reliability of adhesion. Glue between the tiles of natural stone is not applied after laying the entire area, but during the course of work for each element separately.
Apply glue to the edges of stones with glue
On all already laid tiles, apply glue along the edges of the joint with a thin spatula.
Give glue with a margin, a new tile should squeeze out its remnants, they will be removed later. This technology guarantees reliable adhesion of the adhesive to uneven edges of the tile, and the strength of the fixation is noticeably increased.
For marble, buy only special glue, universal use is not recommended. This natural stone requires a special attitude, the glue is quite expensive for it. But saving is not recommended, the stone is much more expensive than glue.
For finishing facades with natural stone, it makes no sense to perfectly level the surfaces. Why? First, the more irregularities, the larger the contact area of the glue with the surface, and this increases the strength of the stone fixation. Of course, everything must be done within reasonable limits. Secondly, natural stone has, in most cases, uneven front surfaces, which does not allow controlling their position using slats. This means that the thickness of the glue should be greater than when laying ordinary ceramic tiles or artificial stone.
The position of the individual tiles is monitored by eye, they have to be strongly pressed while turning from left to right. The thicker the layer of glue, the easier it is to control the position of the stone and the more firmly it adheres.
Installation of natural stone
Decorating the base with stone
After the installation is completed, apply a water repellent
The vast majority of facing works with natural stone can be done with cement-based glue, do not rush to buy expensive two-component compounds , they are needed only in exceptional cases. Remember that the quality of adhesion depends only and not so much on the material as on your skill.
As practice shows, during the facing of external surfaces with natural stone, it is never possible to keep within the consumption rates promised by the manufacturer.
Always buy glue with a small margin, it is much more profitable than interrupting work and re-shopping at the store.
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