Traditionally, the subfloor is a boardwalk or sand cement strainer... The advent of the Knauf floors was a real technological breakthrough. Since the advent of this flooring technology, none of the manufacturers in this construction sector have been able to create anything more economical.
Building materials, which are produced by Knauf, are widespread in our country. They are of impeccable quality, in the Knauf product range there are several dozen varieties of dry mixes, primers, sheet materials (tongue-and-groove, plasterboard, gypsum-fiber sheets).
The screed floors produced by this company are environmentally friendly, fireproof material with excellent thermal and soundproof properties... They are used both in capital construction and during renovation works... Knauf floors have the following positive qualities:
- fire resistance. GVL boards are not subject to combustion;
- environmental friendliness;
- simple installation with minimal time costs;
- compliance with the highest building standards;
- creating an optimal microclimate;
- knauf floors can be used immediately after installation;
- you can use any material for finishing coating: laminate, carpet, parquet, porcelain stoneware, or linoleum;
- for the flooring of such a floor, careful surface preparation is not required, in the installation process there are no operations that require the preparation of any solutions;
- during operation, the coating does not deform, does not creak, there are no cracks or breaks on it. The total weight of the floors is low and does not create a significant load on the floors and supporting structures;
- installation of the floor can be carried out in an unheated building in winter, the main thing is that there is no high humidity in it.
And one more important plus is the lowest-cost floor covering.
| KNAUF-superfloor Floor element (EP). Characteristic | Description |
|---|---|
| Preparation method | KNAUF superpol. Prefabricated product made of gypsum-fiber moisture-resistant KNAUF-superlists (GVLV), to create a "dry" screed - a prefabricated base of the floor. Floor elements are made by gluing two moisture resistant gypsum fiber sheets (GVLV in accordance with GOST R 51829-2001) with dimensions of 1200x600x20 mm with mutual displacement in two perpendicular directions and the formation of folds 50 mm wide along the perimeter of the products. The total thickness of the EP is 20 mm. |
| Application area | It is used for the installation of a prefabricated sub-floor, in buildings for various purposes. |
| Specifications | Dimensions, mm: 1200x600x20. Element weight, kg: about 18. Fold width, mm - bottom layer - top layer: 50. Useful area of \u200b\u200bthe element, m2: 0.75. Thermal conductivity coefficient, W / m С: from 0.22 to 0.36. Heat assimilation coefficient, W / m С: no more than 6.2. Front surface hardness, MPa: not less than 20. Surface water absorption, kg / m2: no more than 1.0. Vapor permeability coefficient, Mg / m h Pa: 0.12. Specific effective activity of natural radionuclides, Bq / kg: no more than 370. Packaging: Package of 70 elements (50.4 m2). With shrink wrap. |
| Fire-fighting specifications | KNAUF-superfloor (floor element) is assigned to the class fire hazard KM 1, which is confirmed by a certificate of compliance with the requirements Federal law RF № 123-FZ "Technical regulations on fire safety requirements". Flammability group according to GOST 30244-94: G1. Toxicity group according to GOST 12.1.044-89: T1. Flame propagation group according to GOST R 51032-97: RG 1. |
| Recommendations | Before use, floor elements must be acclimatized (adapted) indoors. In the installation area, floor elements must be stored horizontally (flat) on a flat surface. The construction of the prefabricated sub-floor (screed) must not have slopes. In cases where a prefabricated sub-floor (screed) is installed in wet rooms (bathrooms), a KNAUF-Flähendichtband waterproofing tape should be laid on the floor-to-wall joints, and the floor surface should be covered with Knauf-Flähendicht waterproofing. If the floor covering is a thin elastic material, it is recommended to cover the base of the floor with a layer of self-leveling putty Knauf-Boden 15 (Leveling putty 415) with a thickness of at least 2 mm. |
What is included
Knauf floors are made by gluing two moisture resistant gVL sheets (gypsum fiber). The thickness of the resulting sheet is 2 cm, the linear dimensions are 1200x600 mm, folds of 5 cm are arranged along the perimeter.
Also part of Knauf floors are fine-grained expanded clay, the amount depends on the layer thickness that is required at a given construction site. If the layer exceeds 6 cm, a second layer of GVL boards is required. The kit usually includes plastic wrap and self-tapping screws. After correct styling Knauf floors, a smooth, solid surface is formed that can withstand a significant load - up to 500 kg per square meter.
Tools and material required for installation
- Construction vacuum cleaner.
- Painting brush.
- Construction gypsum.
- Level (normal building or water).
- Deep penetration soil.
- Pencil or marker.
- Hacksaw for metal.
- Self-tapping screws of the required size (from 2 cm).
- Metal guides (rack profile, 60 mm wide or metal beacons).
- Waterproofing.
- The rule is metallic.
- Glue (PVA or liquid nails).
- Screwdriver.
- Putty knife.
Foundation preparation
In the case when the floor is laid during renovation work, it is necessary to completely dismantle the old covering to the concrete (or wooden) base. For the device of Knauf floors, the base may not be entirely even, but it must be taken into account that the backfill layer should not be more than 10-12 cm.
It is very important in the process of preparing for installation to thoroughly clean the entire area of \u200b\u200bdirt and debris, to close up large potholes / cracks in concrete or plaster mix... It is advisable to vacuum the surface with a professional construction vacuum cleaner and treat it with deep penetration soil. After the soil has dried, you can proceed to the insulation device.
Hydro and vapor barrier device
It is important technological stage and you need to approach it responsibly - a high-quality insulation layer will help you get rid of floor problems on long years... If moisture penetrates, it is possible that certain sections of the floor will sink and the slabs will swell, leading to deformation of the floor covering. First of all, it is necessary to check the horizontalness of the surface using a level and make marks on the walls around the entire perimeter of the room, determining the level of backfill. Self-adhesive waterproofing materials can be used for the waterproofing device, pVC film (not less than 200 microns thick) or vapor barrier. The waterproofing film is laid with an overlap of about 20 cm, the joints are fixed with tape.
The waterproofing foil is overlapped
On the walls, waterproofing should be installed up to the marks that limit the backfill layer.
For wooden floors, glassine can be used as insulation against moisture. Bitumen-impregnated paper is also suitable.
After installing the waterproofing, you should proceed to creating sound insulation. A 10-centimeter layer of insulation (edge \u200b\u200btape) is laid along the walls, which will prevent the floor from deforming and create sound insulation. Ordinary foam tape can also serve as an insulator. They are self-adhesive and ordinary (attached with construction tape or stapler). A good option there will also be the use of a special damper tape.
Bulk material base
The base for GVL slabs can be made not only from expanded clay and silica sand, but also from other types of sand. Screenings or slag (small fraction) can also be used. These materials are characterized by flowability, almost no sedimentation, and high porosity. They have a low hygroscopicity index, so they are optimal for Knauf floors.
The volume required for backfilling depends on the size of the room and the size of the layer, which, in turn, is determined by the presence of communication and the existing slope of the surface. Before starting backfilling, you need to install beacons - guides with which the dry screed will be leveled. The two extreme profiles (or beacons) are set at opposite walls strictly horizontally. They must be placed parallel to each other, the distance from the wall is about 15 cm.
You can put under beacons wooden blocks or small pieces ceramic tiles, but it is better to make support poles from plaster. Then the cord is pulled and intermediate profiles are installed, parallel to the rest, at a distance of 1.5 meters from each other. After installing the lighthouses, expanded clay is poured and carefully leveled using a metal rule.
Backfill leveling with a special rule
After leveling, the beacons must be very carefully removed (after arranging temporary platforms made of thick plywood about 60 by 60 cm in size for movement on them) and adding expanded clay, carefully level it with a metal spatula without disturbing the surface level. On the large areas installation should be done in stages: having completely covered a certain area of \u200b\u200bthe floor, you should proceed to further leveling.
On an absolutely flat surface that does not have deviations from the horizontal, expanded clay backfill is not needed. Instead, you can tightly lay sheets of expanded polystyrene (extruded), making an accurate cut. Mount Knauf floors on expanded polystyrene, observing the usual technology.
Having tamped expanded clay, you can proceed to the installation of GVL sheets. Prefabricated floor elements from Knauf are easy to install, you just need to take your time and carefully follow the entire installation technology. It is better to start laying sheets from the door; on the first sheets, folds should be removed from one side (from the walls) so that they lie flat and do not sink into expanded clay. The installation scheme is a "brick", with the joints shifted by half of the next sheet. The first sheets must be carefully leveled, the level of the assembled floor will depend on how flat they lie. The folds are glued together and scrolled with self-tapping screws every 10-15 cm.
Fastening sheets with self-tapping screws
You can cut sheets of gypsum fiber board with a hacksaw for metal or an ordinary hacksaw with a fine tooth. It is necessary to ensure that expanded clay or other bulk material did not get into the joints. Knauf floors can be assembled at a time throughout the apartment, while observing one level. Installation should be done with a partner; in one working day, you can lay the floor over an area of \u200b\u200bmore than 100 square meters. m.
Knauf floors have stood the test of time, the manufacturer guarantees high quality, but the super floor also has its drawbacks:
- almost always it is necessary to cut the fold of the sheets adjacent to the wall. As a result, this leads to a slight subsidence of the floor during operation;
- removing the lighthouses and adding a small amount of expanded clay is quite difficult to maintain a completely flat surface, which is necessary for installation. But beacons left under the floor can also lead to deformation of the coating.
Knauf floors are afraid of moisture and require thorough waterproofing.
During the installation process, you need to ensure that the bulk material is absolutely dry, otherwise the floor may "lead". Knauf floors are not recommended to be installed in basements and basement floors... When laying such a floor in bathrooms and kitchens, it is necessary to perform high-quality waterproofing and install a top coat that does not allow moisture to pass through. Such a floor should not be installed in rooms with a heavy load - in office and municipal buildings, in production halls. Knauf floors are a great option for an apartment or a private house with good ventilation system... If the installation was done with high quality, this floor will serve you for a very long time.
Example of laying tiles on a KNAUF floor
Video - Paul Knauf do it yourself
As a result of reconstructions, repairs of old premises. The question arises of what to do with the floor. Floor influences room parameters such as humidity, sound insulation level, thermal insulation and ambient temperature.
Usually, cement screed or wooden flooring is used as subfloors.
Technology “ Knauf superpol", From the leading company Knauf. This technology allows you to quickly and efficiently perform a rough installation of the subfloor, for further use of floor coverings such as parquet, laminate and linoleum.
Knauf superpole is a two-component system consisting of: 
- From sheets of glued gypsum fiber with a 5 cm bevel. Produced by the method of semi-dry pressing in the factory. The sheets have a thickness of 1 - 2 cm., A length of 120 cm and a width of 60 cm, which reduces their weight and facilitates transportation. The weight of one sheet is about 18 kg. The front side of the knauf superfloor element is ground. Also, it is not unimportant that the load resistance is 20 MPa.
- From a dry screed, which consists of expanded clay crumbs with granules up to 5 mm. Expanded clay has excellent thermal insulation, fire-fighting, as well as soundproofing properties. When using granules bigger size, a characteristic sound will appear as a result of walking.
The main advantages of Knauf superpol
Knauf Paul also has disadvantages:
- Use of beacons. It is impossible to leave them under the knauf super floor slabs, because of them surface deformation can occur. And in the process of dismantling them, it is difficult to provide a perfectly flat surface.
- Knauf superpol sheets are afraid of moisture. Increased requirements for waterproofing. All material must be dry with a minimum moisture content.
- Not suitable for offices and industrial premises where high dynamic loads are used.
- We have to remove the seam from the plates located at the walls, which leads to a slight subsidence of the floor.
The Knauf system has the main advantage over other methods of leveling floors, it is not a significant cost. It can be used both in industrial and residential premises.
A dry screed is used to eliminate differences over 40-50 mm, which is important for the old fund. If the layer height exceeds 6 cm, then an additional layer of slabs will be required. The technology can also be used in rooms with any relative humidity.
Preparatory work
Before you start laying the knauf superfloor, preparatory work is required.
To mount a superfloor knauf with our own hands, we need:
- Building level.
- Industrial or old vacuum cleaner.
- Primer.
- Hacksaw for metal, marker, sealant.
- Waterproofing.
- Screwdriver.
- Liquid Nails.
- Beacons.
- Self-tapping screws.
First, let's free the surface from various construction debris. Thoroughly clean the entire surface, preferably using a vacuum cleaner for this. We prime the surface of the screed floor.
After the primer has dried, you can proceed to waterproofing the floor. But first, along the perimeter of the room, we set the desired level of backfill.
As waterproofing material use vapor barrier film or PVC. The film is laid with an overlap on each other, and the joint is glued with tape. Also, waterproofing is laid on the wall surface, up to the level of the intended backfill.
After installing the waterproofing layer, soundproofing is also mounted. Usually this is a tape-type insulation with a width of about 100 mm, you can also use a foam tape. 
After that, you can start backfilling the very base under the GVL knauf superpol. For this, expanded clay is usually used in bags. But, also, the possibility of using sand is not prohibited different kind, screening or slag with the corresponding fraction of granules.
At a filling height of more than 5-6 cm, it is required to compact the layer. To begin with, we will set the beacons, the extreme ones are located from the wall, at a distance of 15 cm, all subsequent guides are parallel to each other at a distance of 1.5 meters.
After that, the prepared bulk material is backfilled, the alignment is carried out using the rule. After the final leveling of the surface, it is necessary to remove the beacons.
Excellent soundproofing and thermal insulation properties... Minimum load on load-bearing floors. Well suited for individual houses, apartments. The only drawback is fear of moisture. The choice is yours.
When any repair touches the plane of the floor, the main question for residents and builders is the question of how to level the floor.
The modern building materials market dynamically reacts to the flooring problem and almost every year builders are offered new technologies or mixtures. There are dozens of flooring options on the market now. One of the last effective methods leveling the subfloor - KNAUF - superpol. An important difference between this "dry" screed is that it whole technologyconsisting of several building materials and processes.
The advantages of this technology are as follows:
- Used on both concrete and wooden base with floor level differences up to 10 cm.
- Low weight of the finished structure.
- Installation speed. An area of \u200b\u200babout 50 sq / m is processed within 2 working days and already 24 hours after laying the super floor, you can start finishing: lay laminate, parquet and tiles, lay linoleum.
- Durability - the construction of the super floor is capable of withstanding a load of 20 to 40 kg per cm / sq., Depending on the material of the finish.
- High thermal and sound insulating properties.
- In the space under the superfloor, you can lay communications.
So, let's talk about everything in order.
Superpol system device
Laying is done quickly enough and in several stages. First, you need to carefully remove the base of the floor from any debris and process all the gaps and crevices found between the wall and the ceiling.
A polyethylene film is laid on the concrete base, for wooden floors instead of a film, use a special backing paper, and it must be laid with an overlap.
It is important to take into account that the edges of the film and paper along the entire perimeter should go 15-20 cm onto the walls.
It is fixed on top of the film along the perimeter edging tape, which compensates for deformational expansion and increases the sound insulation properties of the new screed. After the entire superfloor system has been laid, excess film and edging tape are trimmed along the contour.
Next, backfill is poured onto the film based on fine-grained expanded clay, with a layer of at least 20 mm. how free-flowing mixture, it is a little "dusty", so it is better to work with a mask.
In order to level the expanded clay sand, before laying the superfloor sheets, it is necessary to install beacons clearly set on laser level, and already along them the backfill is leveled using the trapezoidal rule.
Elements of the Superpol system
Elements of the "superfloor" system are gypsum-fiber sheets (GVLV), which have high moisture resistance and strength, it is not for nothing that this material is called superlist. Unlike conventional drywall, a different production technology is used here: gypsum dough is pressed with fibers of fluffed waste paper.
For the super floor, the German manufacturer offers two sheet formats: the so-called floor elements (EP), 1200x600x20 in size and a small-format sheet GVLV. The difference between the sheets is that EPs are made by gluing two moisture-resistant gypsum-fiber sheets, resulting in folds, the total thickness of such an element is 20 mm.
If you decide to use small-format sheets of GVLV, they need to be laid in two layers with an interval, gluing together with PVA glue and fixing with screws for gypsum fiber sheets.
The main stages of stacking superlists
Laying of floor elements starts from the corner opposite to the doorway, and at the first sheet the fold must be cut to ensure that the sheet adjoins the wall evenly.
To step over the backfill, moving from window to door, use "islands" of drywall or gypsum fiber cuts, they allow you to move along the dry backfill without violating the integrity of the even layer. Glue is applied along the fold, thus the elements are fastened together. The place of contact in the fold of two sheets must be pulled together with special screws for gypsum fiber board.
If you use small-format sheets of GVLV, they need to be laid in two layers with an interval, gluing together with PVA glue and also fixing with screws for gypsum fiber sheets.
As a result, the surface acquires a perfectly flat plane on which any finishing floor covering lies, be it laminate, parquet, tile, linoleum, etc.
What else is important to know about the Superpol system
With this technology, insulation can be used to improve the thermal insulation of the room. Also under the elements of KNAUF - superfloor installation of plastic or metal-plastic pipes heating and plumbing communications. It is important to note that the laying and crimping of communications is performed before the stage of backfilling of expanded clay.
If it is planned to lay linoleum on the floor, the gaps of the plates and fastening the screws must be leveled with Fügen GV putty. For other floor finishes this treatment is not necessary.
In rooms with high humiditywhen laying ceramic tiles or porcelain stoneware on the floor, you need to protect the sheets from moisture. It is recommended to apply Flächentikht waterproofing before cladding.
In general, we can add that the superfloor system helps to level the base, equip an even and high-quality floor in the apartment, reducing time costs significantly, especially in comparison with cement screeds. This German technology greatly simplifies the installation of floors in rooms with complex configurations.
Video
You can learn more about this system by watching the video.
Is it possible, having completed the floor screed in one day, the next day to start laying the topcoat? Not so long ago, this seemed unrealistic, because a "wet" cement screed requires at least 28 days for final drying. But already about 15 years ago, the revolutionary Knauf screed technology appeared, which turned the idea of \u200b\u200bthis process upside down. One of the names that stuck behind it for this reason is "superpol Knauf".
Today, probably, there is no person, in one way or another, connected with the construction industry, who would not have heard of this company, which produces a variety of finishing and building materials, as well as paints and varnishes, components of suspended ceiling systems, hydro, heat and sound insulating materials. fasteners, various tools.
But most of all, this company is known for its perfected technology of plasterboard facing materials, being its ancestor. Founded by the two Knauf brothers in 1932 as a manufacturer of plaster building mixtures, already in the 50s, the company began producing the first plasterboard materials, soon becoming the undisputed leader of this technology. And today we can confidently say that Knauf and drywall are two inextricably linked concepts.
The Knauf screed flooring method is essentially a long known technology semi-dry or dry prefabricated screed, when sheet panels of the rough covering are mounted on a substrate made of a thin layer of finely dispersed bulk material. The soft and seemingly loose backfill pressed by them becomes strong and solid, capable of withstanding sufficiently large loads.
The Knauf method uses very fine expanded clay sand with a granule size not exceeding 4 mm according to the standard. After leveling the backfill with the right "along the beacons", it is covered with sheets of gypsum fiber material. The backfill thickness should be between 30 and 100 mm.
Gypsum fiber sheets (GVL) differ from gypsum plasterboards by the absence of a top paper coating and are a uniform mixture of gypsum and cellulose fibers reinforcing it. Having high strength and fire resistance, they are at the same time quite environmentally friendly and chemically safe.
Structural elements of the Knauf superfloor are produced in the form of panels glued from two GVL sheets with dimensions of 1200 × 600 × 10 mm with an offset relative to each other to form folds with a width of 50 mm around the perimeter, along which they are fastened together during laying with adhesive mastic and self-tapping screws ... The total thickness of the resulting superfloor coating is 20 mm.
Advantages
- The main advantage of this technology is the absence of "wet" materials and operations. This is especially valuable not so much in the process of constructing new buildings, as when performing repair work in existing ones, since it excludes possible leaks and the penetration of moisture and dampness into adjacent rooms.
- High execution speed installation works... There is no need for special mechanisms. Installation of a Knauf superfloor in a 20 m² room by a team of two people during a working day, together with delivery and unloading work, is quite common.
- Right after installation of GVL the floor panels are ready for the installation of the topcoat and for accepting the workload.
- In addition to the speed of installation, Knauf floors are distinguished by their high speed and convenience in dismantling work in the event of their dismantling. GVLlists are removed using a conventional jigsaw, then backfill is collected with a shovel or scoop.
- The small overall thickness of the entire “pie” of dry screed - from 50 mm with a backfill layer thickness of 30 mm - results in very low loss of height and volume of the room.
- The total total weight of the floor structure is significantly less than with traditional screed methods. This significantly reduces the load on the supporting elements of the floors and the structure of the entire building.
- Low thermal conductivity makes it possible to refuse additional layers of heat insulators for thin top coatings such as laminate, linoleum, cork, etc.
- High sound insulation properties of Knauf floors are significantly superior in this parameter to wood and parquet flooring.
- Excellent fire safety.
- Possibility of installation at any time of the year.
- Also Knauf floors are highly environmentally friendly and chemical inert.
Main technical characteristics:
- dimensions of panels with folds 50 mm wide - 1250 × 650 × 20 mm;
- area covered by one element - 0.75 m²;
- weight of one panel - no more than 18 kg;
- brinell hardness - 22 MPa (220 kgf / cm²);
- strength expanded clay backfill for compression - not less than 10 MPa;
- thermal conductivity - 0.25 ~ 0.35 W / (m2 × ° K);
- sound insulation: 58 dB - from air and 55 dB - from impact noise;
- fire safety in terms of flammability, flammability, smoke generation and toxicity of gases - G1, B1, D1, T1;
disadvantages
If we talk about the disadvantages knauf technology, then there are practically none, although many people here call the "fear of water" of this material, but leaks and flooding can thoroughly ruin any kind of floor. Even if the consequences of such accidents do not appear immediately, after a while they will certainly make themselves felt in the form of fungus, mold and rot. But the convenience of dismantling Knauf floors allows you to replace them with the lowest labor costs compared to other types of coatings.
Many homeowners and builders, for reasons of economy, believe that on the upper floors of buildings and structures, it is possible to neglect the installation of moisture protection film under the base of a dry screed. This is a gross mistake, since moisture can flow through the floor slabs from adjacent rooms. In addition, such a film also performs the function of a vapor barrier, protecting materials from condensation.
Laying method
In the considered here the simplest technique The constructive technology of dry screed, which has the designation "Alpha" in Knauf's terminology, uses a single-layer installation of gypsum fiber board, but there are other options that involve a more complex "cake" using additional layers of expanded polystyrene or porous fiber sound and heat insulating materials from this company.
Required materials:
Required tools:
- drill, screwdriver;
- jigsaw;
- drywall knife;
- measuring instruments: tape measure, meter, square, level;
- metal profile for the installation of "beacons";
- rule for aligning the backfill layer with the beacons.
Step by step guide
- The surface of the floor slabs under the base of the floor must be well cleaned of debris. The protruding ends of fittings, wires, nails, screws must be carefully cut and removed. Large irregularities and pieces of rubble sticking out of the concrete should be carefully knocked down with a chisel.
- On a prepared base the vapor barrier film is spread with overlapping adjacent sheets at least 200 mm on top of each other. Its edges along the perimeter of the room should go over the walls above the level of the future floor.
- Then, along all the walls, an edge tape is installed vertically, designed to compensate for the temperature deformations of Knauf superfloor panels. The expansion gap at the edges is very important condition this technology. It avoids the floor swelling when the room temperature changes.
- Along the line of the proposed installation metal profiles lighthouses are poured along the length of a small hill of expanded clay. From above, beacons are pressed into it with adjustment to the level, based on the total thickness of the backfill not more than 10 cm. If floors are replaced only in one room of the house, the level of the future flooring should "come" to the corresponding level in the rest of the rooms.
- In the space between the lighthouses, the expanded clay layer is backfilled, which is then leveled with the right. One of the advantages of a Knauf floor is the ability to backfill and lay the flooring not completely throughout the room, but in parts.
- Then the lighthouses are removed, and the traces of them are sprinkled with a small amount of expanded clay. To the corner from which the installation of GVLlists will begin, a "path" of several free panels is being laid, along which it will be possible to move without damaging the rest of the filling.
- The folds of GVL panels adjacent to walls and partitions must be cut so that their thickness in these places is double. The first row of panels is laid out along one of the walls. Work should be started from the opposite wall of the room, gradually moving to front door. Before laying the next row, the folds of the previous one are lubricated with glue or mastic.
- The sheets of each next row are laid with their displacement relative to the previous one at least 250 mm. The formation of cruciform joints is not allowed. Then the glued joints are fastened with screws with a pitch not exceeding 300 mm.
- After the floor has been laid in the entire room, all the joints between the sheets should be putty with gypsum plaster Knauf.
- Before laying the topcoat, knauf Superfloor must be primed with deep penetration.
For a significant increase in the strength of the coating, you can lay the second layer of GVL panels by changing the direction of laying perpendicular to the sheets of the first layer.
conclusions
Knauf superfloor technology is the best fit for systems so popular today underfloor heating... And the high heat-insulating properties of bulk floors significantly reduce the heat loss of the room through its base, which significantly increases the energy efficiency of any heating systems. We can confidently say that the cost of installing Knauf bulk floors with good overall thermal insulation of the house will pay off within 2-3 years due to savings on heating.
German manufacturer of screed Knauf dry positioned as a Super floor, suitable for use in dry and humid rooms, the temperature inside which does not fall below + 10 degrees.
In addition to materials for 4 types of dry screed - Alpha, Beta, Vega and Gamma, knauf company manufactures tools for this technology (2 guide rails and one sliding rule as standard).
However, original brand products are expensive to repair on their own you can get by with GVL sheets of any manufacturer, plastic wrap, damper tape and expanded clay sand from the nearest building materials store. The tool is an aluminum rule of 1.5 - 2 m and a profile from GVL systems (usually rack-mountable 2.7 x 6 cm).
Knauf dry screed device in layers
In the album of Superpole technical solutions by the manufacturer's materials, Knauf's dry floor screed is presented in four options with different composition of the "pie" of the construction:
- Alpha - on flat ceilings or slabs pre-leveled with a self-leveling floor, only two layers of GVL sheets are used without film waterproofing;
- Beta - also on flat floors, but acoustic (usually sound-absorbing) material is laid under the gypsum fiber panels;
- Vega - system for an uneven base, includes a layer of expanded clay sand, on which two layers of GVL sheets are laid;
- Gamma - sound insulation is placed under the gypsum fiber boards, then a waterproofing film and expanded clay backfill.
Superpol Knauf pie options.
Important! The design of the Knauf Superfloor is floating, therefore, for all indicated options, a damper tape along the perimeter of the walls at the junction points is mandatory.
In practice, the most often used laying technology is the Vega and Gamma options. Expanded clay backfill is cheaper than a self-leveling floor, in addition to leveling the floor, it additionally improves the acoustic properties of floor slabs:
| Technology Super floor |
Number of layers | Airborne noise insulation index R (dBA) | Reduced structural noise index L (dBa) | Construction thickness (cm) | |
| Alpha | 2 GVL | 24 | 52 | 60 | 2 |
| Beta | 2 GVL + porous sound insulator | 28 | 53 | 55 | 3 – 5 |
| Vega | 2 GVL + expanded clay + polyethylene | 36 | 53 | 58 | 4 |
| Gamma | 2 GVL + porous sound insulator + polyethylene + expanded clay | 60 | 55 | 55 | 5 – 11 |
Important! If a warm floor is laid in the project, it is laid ON TOP of the dry Knauf screed. Before tiling, the surface of gypsum plasterboard sheets is putty with a continuous layer of at least 2 mm thick with special elastic compounds, for example, NivelirSpachtel 415 from Knauf.
Features of dry screed for different floor coverings.
Laying technology
Unlike wet and semi-dry screeds, Superfloor is laid much faster. You can walk on a dry screed already during the installation of GVL sheets. This option provides not only high maintainability of the structure, but also the communications hidden under it. Boxes and other structures made of plasterboard do not gain moisture, since there are no wet processes, the windows do not fog up, even with poor ventilation.
Knauf dry screed floor slabs should be inspected to identify defective areas. The sequence of operations at this stage is as follows:
- removal of a loose layer of concrete or processing it with special compounds (deep penetration primer);
- filling with putty mixtures of cracks, joints and seams as required;
- dedusting and removing oil stains;
- drying wet areas of concrete.
Important! For the Alpha version Superfloor without expanded clay sand, it is necessary to level the slabs with a self-leveling floor.
Horizontal level break
For a dry floor screed Knauf it is impossible to use the understatement method highest point horizontal level, since the sheet of GVL cannot be brought to zero. Therefore, the rise in the level of the finished floor will be at least 2 cm at the top.
Horizontal beating is done as follows:
- a laser level or plane builder is installed in one room so that the beam penetrates the walls of adjoining rooms;
- at an arbitrary height, a single line is drawn in all rooms of the cottage / apartment;
- the distances from this line to the floor slabs are measured, the upper point is located (the minimum size according to the results of measurements);
- the perimeter of the walls is pasted over with a damper tape, the upper edge of which should be 2 cm above the mark flooring;
- the upper line of the horizontal level is transferred to the tape with a tape measure, taking into account the indicated values \u200b\u200bof the thickness of the dry screed.
Advice! When using the plane builder, it is not necessary to make a line, all subsequent operations can be performed with the device turned on, focusing on its laser beam.
Waterproofing, insulation and acoustic material
Depending on the acoustic and thermodynamic characteristics of the floor slab, the dry screed cake may contain different materials... Therefore, they fit into the sequence:
- noise absorbing or soundproof material directly on floor slabs;
- polyethylene film with overlapping strips of 15 cm minimum, the edges of which overlap the walls 2 cm above the level of the floor covering (run under damper tape), in the absence of acoustic material, it covers the ceiling;
- thermal insulation - on top of previous layers or one plastic film.
Important! There is no need to reinforce dry screeds, the contours of the warm floor inside them are not used. All engineering systems risers passing through the ceiling are wrapped with a damper tape.
Backfilling of expanded clay chips
To reduce labor costs, Compavit bulk material is applied to the previous layers of a dry screed pie using the following technology:
Important! When using a conventional galvanized profile, traces of shelves remain in the Compavita layer, which must be additionally leveled. Special tool Knauf allows you to avoid this operation - the guides are laid on top of expanded clay, and the rule has a special profile (cutouts along the edges), so there are no traces of lighthouses.
Laying GVL sheets
Unlike wet screeds, it is easier for the master to navigate through expanded clay by laying several pieces of gypsum fiber board with a size of 50 x 50 cm. Therefore, laying sheet material it is not necessary to start from the corner farthest to the doorway.
Unlike conventional GVL sheets, the manufacturer Knauf manufactures EP elements - two panels glued together with an offset of 5 cm. Due to the offset, the seam connection is obtained between adjacent rows by default.
The technology for installing the top hard layer of dry screed is as follows:
Important! The manufacturer completes the Superfloor systems with self-tapping screws 3.9 mm, length 19 - 45 mm (100 pieces per box) with MN marking.
Nuances of Superpole Knauf
IN ideal dry screed must be installed in all areas of the dwelling at once. Since in the places where it is adjacent to the doorway, expanded clay will spill out from under the sheets of gypsum fiber board. However, in practice, Superfloor is mounted in separate rooms, therefore the following technique is used:
Thus, the bulk material is completely confined by the rigid box and cannot spill out from under the top layer.
Important! Even light partitions are forbidden to rely on Knauf Superfloor, so they must be erected before installing the dry screed.
Thus, Knauf dry screed is a complete system with a detailed installation guide in the manufacturer's standard solutions album. However, you can make the structure yourself from ordinary GVL sheets without a special tool.
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