Technology "wet facade"

By Admin | Building
25 May 2016

advantages.Applied Materials

One of the most affordable and best in terms of thermal insulation methods facade - the so-called "wet front."This method also gives a lot of room for decorating the home, since the materials for the topcoat have a rich color palette, new paint formulations, making it possible to create interesting textures such as mosaic, with an imitation stone or brick masonry structure "bark beetle".The technology is constantly being improved, it became possible to buy insulation boards made of extruded polystyrene, which previously suffered a finishing layer.
technology "wet facade" is indispensable to improve the appearance and insulation of old buildings.Installation of such a system does not create excessive load on the supporting structures of the building, that is, you can save money, needed to strengthen the foundation.
Wet facade provides installation of insulation on the outside of the house, therefore, useful area of ​​the dwelling is not reduced.At the same ti
me, increased comfort housing - in the cold season, the walls are not blown and freeze, the indoor temperature is evenly distributed.The hottest months facade system avoids excessive heating of building structures, microclimate inside the house remains comfortable.It is also important that the improved sound insulation of the house.
Thus, we can say that the use of this technology allows the facade to create an individual look of the house, to substantially increase its service life and create favorable conditions for the owners of the house.
«Pie" wet facade is composed of several layers, with a specific function.To create a thermal insulation layer applied polystyrene front marks, density of the material - 16-17 kg / m3, an alternative rock wool the density is 120-170 kg / m3.To determine the thickness of the insulating layer should be made an accurate calculation of Thermal Engineering.
To align the bearing wall and reliable fixing insulation boards reinforced layer is created.It serves as the foundation for the outer layers and consists of adhesive and fiberglass reinforcement, resistant to alkalis.
To protect the whole "pie" and create decorative effects is the final layer, to create it applied plaster compositions of various types - silicate, silicone, mineral.Mineral plaster in the final stages of installation of "wet" facade stained with special dyes are often used seloksanovye plaster, coloring in the mass.There is a version of the origin of the term "wet" facade, connected with the fact that the plaster for the finishing layer is made in the form of a powder, which is diluted with water before applying.
before proceeding to make an accurate calculation and check whether the elements of the system are compatible on indicators such as thermal expansion, frost resistance, water resistance, vapor permeability.For example, mineral wool insulation has a high water vapor transmission rate, and if the finish plaster badly passes water vapor, trap moisture that will soon destroy the decorative coating.
Installation procedure and possible errors
first stage of installation work is surface preparation.Wall should be cleaned of dust and dirt, remove protruding from the wall of the valve, the excess solution in the masonry, any more protruding metal parts.In some cases, the repair work may be required, for example, if there are cracks in the wall.Prepared wall primer is treated to provide a reliable grip with the surface of the wall insulation.Casually The performed training wall can result in the best case to the appearance of rust stains, and at worst - to a complete collapse of the system insulation.
Then you need to mount a ground profile and crutches window drains, basement strips installed horizontally and form the basis for laying the first row of insulation.For competent installation "kerchiefs" in the corners of door and window openings at the ends of drip caps are necessary plugs violation of technologies at this stage may result in water entering the system and the destruction of the front of the junction of drip caps.
next step is bonding insulation boards to the wall.Clay diluted in strict accordance with the manufacturer's recommendations and applied to the heater plate.Adhesive is applied around the perimeter, and further at least six places on the square plate.Spread the glue is best, using a comb trowel, resulting grooves act as expansion joints.The area covered with adhesive must be at least 40% of the entire area of ​​the insulation boards.
first row of insulation is installed with a mandatory check on the level.Subsequent rows of knit stick method, such as masonry, it is necessary to make sure that the gaps between the plates of 2-3mm.Failure to comply with these conditions will inevitably appear on the facade cracks and gaps.
After gluing the insulation need short time to glue acquired the necessary strength.This time period is specified by the manufacturer and must be strictly observed.Then, the insulation is secured with a facade anchors.The quality of this type of hardware is necessary to pay very close attention, because they account for the whole wind load.
type plugs selected depending on the wall material and insulation as the sale has a very wide range of hardware products, it is necessary in each case to consult with a specialist.The main types of dowels are precast with the spacer element in the form of polypropylene nail, nail, made of glass fiber reinforced polyamide, nail of galvanized steel (flame-resistant version);screw, in which the role played by the spacer screw.To make the changes apply booster mounting collar (Mirandola).There dowels equipped with a thermal head, they used to completely eliminate heat loss.
Counting the number of dowels must take into account the weight of the system, the wind load as well as a facade zone is attachable plate.On average, for a small number of storeys of the building, what is the holiday home, it is enough 5 - 6 dowels per 1 sq.m.
One of the major mistakes at this stage is the excessive penetration of dowels in precast slab insulation.In this case, the landing zone is deformed anchors, reduced relative to the calculated level of traction with the ground.If the dowel plate protrudes above the plane of the plate, on the front there are bumps, affecting the appearance.
about a day after the end of the installation polystyrene plates are fixed on top of reinforcing mesh.It would seem to put a plaster layer, which is recessed grid, snap, but with no experience, you can make mistakes.
First of all, you need to cut out pre-fiberglass, with the expectation that in the joints mesh could be laid with overlaps of at least 10 mm.The absence of overlaps may form cracks.In order to close any defects caused by the installation of insulation, it is necessary to put "draft" layer of plaster, which is recessed and glass cloth mesh.Above the surface of the plaster should not be visible thread mesh, can not prevent the formation of creases and wrinkles when laying the grid.Then apply the final coat of plaster.
mesh is made of fiberglass and impregnated with polymers.The main requirement for the grid - high resistance to alkalis, poor quality mesh can simply dissolve.High-quality fiberglass elastic, resistant to the tensile strength and tear points weave securely locked.Use of high-quality mesh is particularly important in Russian climate, as it reduces internal stresses, thus preventing cracking of the facade at sharp temperature drops.
Professionals recommend to carry out reinforcement in "vandal-resistant" version to a height of 2.5m, to avoid damaging the insulation when striking the facade of the building.
Getting to the creation of protective and decorative layer, select the decorative plaster, paying attention to its texture and indicators of water vapor permeability.Selection of decorative plaster and paint finishes on the market of finishing materials is huge and working methods for creating decorative effects are also quite diverse.At this stage, the landlord can give full play to their imagination to give the house a unique look