Flexible plaster - material that will not crack
On recent constructions or renewed layer plaster cracks often form.
The root cause of this can often be uneven shrinkage, look for the effect of ground-type waters, and many other factors. To avoid such problems, progress should be taken into account.
Flexible plaster is a novelty on the building materials market, which helps to maintain a beautiful appearance of the finish and avoid repeated repair work.
Elastic plaster is often also called rubber.
Naturally, there are no standard rubber ingredients in the composition, but the properties will indeed resemble such a plastic material that can bend without damaging the surface. Like rubber, elastic plaster can elongate by 15% or more when stretched, and is not yet covered with cracks when displacing, moving, or vibrating the bases. Today, flexible plaster is in the assortment of products of many eminent manufacturers of building mixtures. In terms of facade work, the material competes with simple mineral plasters, which, even with a slight shrinkage of the building, begin to deteriorate. Due to their low elasticity and elasticity, mineral mixtures are not able to withstand difficult operating conditions and quickly cease to provide the required protection to structural elements.
The main component of flexible plaster mixes is acrylic resin - a substance that was invented back in the 20th century. Like other resins of artificial origin, it is characterized by flexibility after curing, and therefore they are widely used to create various building materials - paints, plasters and stone. At the beginning, paints were made on the basis of acrylic, dyes and water, into which mineral fillers (up to 70% of the total mass) were then added. The following can be used as a filler:
Please note that in order to improve the characteristics of the composition, various additives for modification, as well as plasticizers, were introduced into it. Certain hardening plasters contain cement, which, when combined with acrylic, makes the coating very resistant to mechanical stress.
Plaster is produced ready-made, and no mixing of ingredients is required. Once applied and dried, it forms a seamless, weather-resistant coating.
The benefits of an elastic blend are:
There are very few disadvantages of such a tool. This material cannot be called inexpensive - its cost is quite large, and a complete decoration for a building can cost a penny. Moreover, it is not suitable for rough leveling with a thick layer, but is required only for decorative and finishing. Elastic plaster does not like joints, seams, and therefore it is advisable to cover each surface in one go.
"Rubber" plaster can have different technical characteristics, which will vary depending on manufacturers.
The average parameters of materials of this type are as follows:
Most often plaster used as a facade - it is used for the final decoration of the outer side of the building, structures and structures.
After drying, a kind of dense, but still breathable membrane will form on the surface, which will not let water through, protect the walls and will not crack when the foundation shrinks and moves. Plaster has high tensile properties, and therefore it can be used even on very difficult areas of facades. The material is ideal for new buildings, as well as buildings that are located in seismically active zones. Elastic compounds are excellent for the final design of insulated buildings as part of plaster systems.
The elastic mixture is useful for wet rooms - toilet, bathroom, basement, pool, and also a bath.
The plaster layer can both stretch and shrink, and therefore it can be used for cladding halls, corridors, staircases. Plaster is usually used to cover gypsum stucco, polyurethane products, polystyrene, and also finish the surface of walls with a large number of seams and joints to obtain a seamless coating. If necessary, floor coverings such as carpet or parquet are glued to flexible interior plaster.
The material is produced in the two most popular versions:
- Elastic acrylic plaster. Such a mixture is required for the final processing and protection of premises, facades, as well as other external and internal structures.
It is made on the basis of acrylic resin, and is also designed for work on brick, concrete, stone, galvanized steel, slabs, other materials and plastic. Also, the material is resistant to temperatures in frost and moisture levels.
- Flexible decorative plaster. In addition to protecting surfaces, the product will have another purpose - to give a beautiful appearance. The decorating effect is achieved when a filler with different shapes and sizes of grains is included in the composition, and also through the use of special techniques for processing the plaster layer.
Please note that most often decorative plasters include polymer fibers, and a little less often stone chips of natural origin. By means of such mixtures it is possible to provide surfaces with various effects: "fur coat", imitation of plaster, "fleece", "bark beetle" and everything else. Tinted decorative plasters are used in the sgraffito technique.
For high-quality application of elastic type plaster, it is necessary to ensure that many conditions are met. Work with such compositions can be carried out at temperatures from +5 to +31 degrees, and their use at negative temperatures is unacceptable.
If plaster is applied to the facade, the walls should be closed from wind, precipitation, drafts, and even direct sunlight. Air humidity when facing surfaces should not exceed 80% for outdoor work, 65% for indoor work. The material is used only for the design of vertical surfaces, in which the vertical deviation will not be more than 25 degrees.Elastic plasters must not be mixed with other building compounds, paint and putty.
Required tools and materials
As a rule, the plaster is applied to the surface of the walls with a wide metal spatula or trowel.
A polyurethane or plastic float is also useful for grinding it. To give the surface a relief, special floats, curly rollers and even improvised means are used. For painting the dried layer of paints, painting tools for mixing the solution - a construction mixer and a bucket. You will also need a primer itself, a canvas for reinforcement, an adhesive composition, an antiseptic, dowels, and also a rough plaster mixture.
Preparatory stage and priming of the surface
Elastic type of plaster has a high degree of adhesion to different surfaces, but without their good preparation, such an indicator can be reduced.
Thanks to the preparation measures, the stability, reliability, durability of the finished coatings increase, which will facilitate the application of the plaster layer. Another preparation will help to reveal defects, which will then be eliminated.
Please note that to begin with, remove dirt from the surface, protruding mortar for masonry, other dirt, peeling off the old coating. Be sure to remove any enamel and oil paints, as well as cracked putty and plaster. Chalk and lime can be washed off with water, and areas affected by mold should be cleaned and treated with an antiseptic.
Cracks should be opened, thoroughly covered with cement mortar, and oil stains can be easily removed with a solvent.
During preparation for the application of flexible plaster, the parts are covered with special insulating agents, and the fasteners and screws are recessed into the walls to 0 .2 cm After drying, the base should be treated with a primer, which is extremely important for its high degree of porosity. Otherwise, the base will draw water from the plaster, and the quality of the finished layer will become worse. The primer also helps to bind residual dust, and also strengthens the base and improves the degree of adhesion.
The primer should be applied in a couple of coats with complete intermediate drying. After, if necessary, bases with sharp drops should be treated with mineral compounds along the beacons, and the joints are sealed with an elastic sealant, and also compared with the total surface. Only after that the wall will be ready for the final treatment of the elastic plaster.
Reinforcement of surfaces
To strengthen the rough plaster layer on weak substrates, use an alkali-resistant fiberglass mesh. It must be attached to the wall with dowels or glue, and also regularly check the position and eliminate sagging.
Pieces of the mesh should be overlapped by 0. 15 meters, and they are also coated with adhesive. After the composition has dried, a leveling solution is applied, and then elastic plaster.
Application of facade mixture
Acrylic-type plasters are perfectly applied and leveled, and therefore can be worked with a simple spatula. Before covering the walls, the composition is thoroughly mixed, and, if required, a little water is added, but not more than 2% of the main volume.
It is worth starting work from one wall, closing it completely, from the first corner to the second, without interruption. If a working gap occurs, the edge of the dried-out should be moistened with water to a width of at least 0.3 meters, and only after plastering is continued. If you ignore this rule, an ugly transition will be visible on the plaster. Further, after applying and leveling, the mixture should be trowelled from one corner to the second corner.
If you need to apply patterns, roll over the stencils immediately after smoothing the mixture. Next, leave a layer of plaster to dry for 12-24 hours, and only then paint / varnish.
( 5 marks, average 4.2 of 5 )
Posted By: Work Style |09, Nov 2020
Posted By: Work Style |09, Nov 2020
Posted By: Work Style |02, Nov 2020
Posted By: Work Style |13, Nov 2020
Posted By: Work Style |02, Nov 2020