Knauf dry screed: negative reviews, pluses, minuses, features and styling scheme

The "Knauf" dry screed, negative feedback about which is interspersed with positive ones, is a system laid down by technology that excludes wet processes. If you still can not decide which method to equip the floor, then you can compare the described screed with that which is made of concrete. In the latter case, the operation of the premises will be possible only after 28 days, if it is a dry type screed, then it will be possible to move along such a surface in two days.

Features

The Knauf dry screed is quite common among consumers. Features, feedback, layout of this system will be covered in the article. These floors are easy to assemble free-flowing dry construction, which are most often used in residential and public buildings. The need for the arrangement of this system can arise in the case when there is no possibility to carry out wet finishing processes. Up-to-date construction data are also available with a large rise in floor level, as well as with increased requirements for sound insulation of the floor.

If the deadlines are limited, then it is best to use a dry screed Knauf. The work can be done on wooden and concrete floors, but before that it is important to check that the room corresponds to the normal humidity regime, had no restrictions on fire resistance and storeys, as well as climatic and engineering-geological conditions. It is not allowed to attack aggressive substances, and mechanical loads should be characterized by a low intensity.

A dry screed Knauf, negative feedback about which, perhaps, will force you to abandon it, can be arranged in rooms with high humidity by the type of bathrooms, as well as showers. However, there must be a proper waterproofing system. In the place of the joint of the floor with the walls, it is necessary to lay a waterproofing tape of the same manufacturer, while the entire surface is covered with waterproofing.

Stacking technologies

Reviews of the dry floor screed Knauf can help the consumer make the right choice. So, if we consider prefabricated floors of floors that are equipped with Knauf technology, they can be divided into the following types: Alpha, Beta, Vega and Gamma. The first type is a construction laid on flat floors. The second is a system on a substrate of porous-fibrous insulation materials, which must be laid on flat floors. "Vega" is a construction on the basis of a substrate, which is represented by an equalizing layer of dry backfill. The latest version is the construction of a combined substrate of heat and sound insulating fibrous materials, which are laid along the leveling layer of the backfill.

For reference

Super-floor "Knauf" (dry screed) should be used in rooms where the temperature does not fall below +10 degrees. Whereas humidity can vary between 60 and 70%.

Main advantages

Before you will be purchased the described system, it is necessary to read reviews about the dry screed Knauf, opinions about it will help determine the choice. Thus, among the positive features consumers distinguish excellent quality and speed of work at home, as well as savings due to the fact that the construction of the building can be made more lightweight. Among other things, there can be no limitations in architectural solutions. The laid system will meet the world standards, it is environmentally friendly and creates a favorable microclimate. The design has the ability to breathe, give away or absorb moisture with its lack. Inconvenient wet processes will not have to be produced. The dry screed Knauf, the pros and cons of which is recommended to consider before shopping, is able to withstand 360 kilograms of weight on one square centimeter.

Negative moments

Use this system of the floor in the garage, as a heavily moving technique will break and shift the sheets. In addition, you should be prepared for a fairly low moisture resistance. In case of moisture, the surface must be opened for long-term drying or full replacement. Therefore, such structures are not recommended for use on basement floors, in unheated rooms, cellars and for the installation of warm water floors.

Considering the subtleties and nuances of the dry screed Knauf, you will understand that during the installation you will not have to use wet processes. However, this does not exclude some inconveniences, which are the high spread of dust during the filling of expanded clay. That's why masters should work in respirators and glasses. When comparing cost with other methods of laying floors, it can be noted that Knauf systems are much more expensive.

Negative feedback

Consumers sometimes refuse to dry the Knauf screed due to the fact that it requires the use of additional materials, which is accompanied by costs. This is explained by the fear of moisture, while leaks have simply catastrophic consequences. On the floors you will need to lay the vapor barrier layer, which will protect the backfill placed on it from the humidification that occurs when it comes into contact with the overlap. The moisture vapor can penetrate from the lower rooms or concrete, and also through the walls. To ensure steam and moisture protection is recommended to use a polyethylene film, the thickness of which can vary from 200 to 250 microns. This is true for reinforced concrete floors. If it is a question of wood, then it is best to use bituminous paper or parchment. Do not give up on the modern vapor barrier.

The dry screed Knauf, negative feedback about which also exists, according to users, requires the presence of a fairly impressive thickness of the backfill. This affects the ceiling height. The thickness of the layer can vary from 30 to 50 millimeters, but the final layer will depend on the size of the irregularities. That is why, before carrying out the work, it is advisable to level the floor surface. The thickness of the backfill will be affected by engineering communications, as well as other equipment. Consumers argue that the system of dry screed can become a place of formation of fungus or mold under unsuitable conditions. In this case, there is no way to avoid a second repair, which will be accompanied by costs. This indicates significant limitations in the application. Buyers argue that when operating such a floor it is necessary to constantly monitor the microclimate, and in the room there should be no sharp changes in temperature and humidity.

Preparatory work

Initially it will be necessary to prepare a draft base. Under the elements of dry filling you can lay sanitary communications, but only before using claydite. Before installing the floor, it is necessary to prepare a concrete surface, with all gaps and slots between the slabs being sealed with cement mortar grade M 500. After that, the entire area is cleared of debris and foreign objects. If there are minor irregularities up to 5 millimeters on the basis, then such floors can be leveled with corrugated cardboard. Then how to deal with local irregularities up to 20 millimeters is recommended with the help of repair mixtures. Excellent proved itself, for example, Vetonit 4000. If there are more impressive potholes, then it is recommended to fill in fine-grained expanded clay. With it, the slope of the base is leveled, if there is one.

If it is necessary to insulate the floors before laying the dry screed, it is necessary to initially make the leveling with putty, which can be replaced with a sand-cement mix. On such a surface foam polystyrene plates for thermal insulation are laid. After the preparation of the base the waterproofing layer is laid, as the expanded clay does not tolerate contact with moisture. Dry screed "Knauf", reviews, pluses and minuses of which are discussed in detail in the article, should be laid on polyethylene film, lined with an overlap of 20 centimeters. At the walls, the edge of the waterproofing should be above the flooring floor by 2 centimeters. This is necessary to ensure the vapor barrier. Instead of a film it is possible to apply paraffined or corrugated paper, a modern vapor barrier "Svetofol" or parchment.

Backfilling and leveling of dry screed

Claydite, used in the arrangement of the screed, is an excellent thermal insulation material. It should have a small fraction of 2 to 4 millimeters, but the sheathing of large elements can not be taken, because the floors will be requested. Before laying expanded clay sand, you need to install beacons using a laser level, and then it is recommended to apply a trapezoid rule.

Features of Knauf system stacking

The dry screed Knauf, for and against which there were approximately equal number of users, as described in detail above, should not come into contact with the walls, as an insulating contour tape 10 cm wide is laid along the perimeter. Its thickness should be 10 millimeters. You can use polymer wool as a material. With the help of the edge band, it will be possible to compensate for the deformed expansion. Backfill insulation will need to be poured on the floor and aligned with a rack. You should start from the wall, which is located opposite the entrance. Material is tampered by hand.

Which sheets are best used as an outer layer?

The dry screed Knauf, negative feedback about which quite often forces users to make a choice in favor of other materials, can have in the composition sheets of GVL or GKL. These two materials are successfully used today for the arrangement of dry screeds. GCR, for example, is a gypsum plasterboard sheet whose edges are lined with cardboard, with the exception of the end part. In order for the material to be strong, the binding components are added to the gypsum. Cardboard adheres with gypsum with special glue additives. Sheets are well bent and cut, and in prefabricated floors are used somewhat less often than in other species.

GWL is a gypsum-fiber sheet, completely homogeneous in composition. It is stronger, compared with plasterboard, and is more suitable for the floor. Its production is carried out not by pressing, but through cellulose reinforcement. This material is also distinguished by a higher fire resistance. In addition, GVL will be cheaper.

Laying of sheets

The dry screed Knauf, the process of use, the study of feedback on which will eliminate mistakes, fits from the doors, while the gap in the joints should be one millimeter. The first layer is covered with an adhesive compound, and then the second layer is laid. The sheets are located across with the same gap. The webs in the second layer are fixed with screws for GVL.