Often, the most important component of repair in the premises is the smoothing of the walls and ceiling. Nowadays there are a huge variety of plaster mixes, but they are divided into 3 class: cement-sand, cement and plaster mixtures. TM Rotband, Knauf company is a leader in this field, has established itself as a quality and reliable manufacturer of universal plaster plasters of all kinds.
Mixtures of firm Knauf is suitable for all types of finishing works. In the line of this manufacturer You will find ready mix for work at the internal walls, and external, in buildings with low or high humidity, for old and cracked from years of testing walls, as plaster Rotband manual application or machine. They are ideally connected with the concrete, masonry, foam, DSP, and already caused mixture! Gypsum plaster Rotband widely used in kitchen and bathroom. Is connected with cleaned concrete walls and ceilings.
The first and most important thing that you need to do to plaster the maximum quality lay on the walls is to remove all the dirt, all kinds of dust and peeling. Sanded the conspicuous projections and elements of corrosion protection of metal. The application area must be completely dry and able to withstand the weight applied gypsum plaster, having a temperature not below +5 °C.
It is important to understand how many meters of surface, You need to handle, if You want to save your budget and not to pay extra for stuff that will then just be stored in your garage. For this it is necessary to calculate the consumption of gypsum plaster.
For correct calculation you must first take into account the thickness of the required layer thickness. To find out, the wizard usually make measurements of irregularities along the entire length and width of the wall surface by means of special indicators of control points. After summing up the obtained amount of deviation, they share the sum of all the points which were made the measurements, thus getting the average thickness of plaster required. The number of counter-points plays a significant role, the more – the better will be the outcome. Usually the manufacturer indicates the required flow rate of dry gypsum plaster 1 sq. m. with one layer of 10 mm, so next is nothing complicated, solid mathematics. On bags of Rotband always written what will be the consumption of dry mix per square meter. – it will be about 8.5 kg, then you only need to multiply this value by the total surface area and the average thickness of the required layer. For example, to treat the surface of 20 square meters taking into account the obtained values of the counter-points: 1.7 cm, 6 cm, 1 cm, calculate:
CP. the thickness of layer, cm
0,6 (min. height. wall) + 6 + 1 = 7,6
7,6 / 3 = 2,5
Consumption of gypsum plaster Rotband Knauf on 1 sq. m., kg
8,5 * 2,5 = 19,5
The volume on one wall, kg
20 * 19,5 = 396
Three hundred ninety six
Three hundred ninety six
How many bags of dry mix required pieces
396 / 30 = 14.5 mm
Price per bag of 30 kg, RUB
How much is gypsum plaster Rotband in the end, RUB
355 * 15 = 4705
380 * 15 = 4915
On the treated base at intervals of about 30 inches to put the prepared solution Rotband, followed by indentation indicator profiles, and then make sure they are all in the same plane. The distance between the profiles should be no more than 30 cm.
Already mixed mortar gypsum plaster Rotband Knauf spread on the inner part of the profile, also with a long 30 cm.
As for the solution preparation, the ratio of dry mixture/water will be 1 to 3 or 1 to 5. This number will be ideal in order to avoid possible non-uniform setting of the solution. When You have applied the first coat of plaster, you should not immediately start applying the second, give a pre-applied layer to dry and when it is completely dry, repeat the procedure.
Before cooking it is advisable to get a plastic tank already filled with about 18 litres filtered from dirt (if dirty) water. Taking into account the ratio of proportions, pour five to seven trowels plaster and mix. After the solution will begin to change its consistency, to fill up there entire mass of the bag and mix the plaster mixer until You will not leave a homogeneous mass without lumps content. The obtained solution to stand for about five minutes and then stir again to be sure there are no faults in the mix. If you notice that the mixture is too thick, add a little water.
Also, do not experiment and add to the solution by other components, in most case, it will only hurt.
After about 25 minutes after the solution takes a homogeneous mass, it should start to apply on the treated surface, the layer thickness is required to range from five to fifty millimeters. With regard to the process of applying for ceilings, apply gypsum plaster special plaster Falcon, moving «themselves». For walls, you need to spread the plaster also «Falcon» up/down or with the trowel. After that, you should razravnyat all suffered a lot in zigzag motions.
In the case where it is necessary to apply a thick layer of plaster, you should apply a first coat of acceptable thickness and only when it is completely dry to continue applying the next, until You get the desired thickness. Usually for ceilings, it is not required, enough only one layer of plaster.
After application of the weight will slowly start to dry (about 45-60 minutes after application), the treated area should be poravnati with a spatula, getting rid of excess weight and filling empty space. With regard to the processing of junctions of walls and slopes, there is necessary to use a special scraper for plaster.
In the case when the plan is wallpapering to plastering or painting, you need to allow the plaster at least «infusions» fifteen minutes, and then, much to wet it with water and «sanded» with a special grater. This will help to avoid all bumps and hollows, and smooth over the traces of the use of a spatula.
When gypsum plaster is already visually grasped, thus visually began to acquire a matte finish, it should smooth out a large spatula, making large longitudinal movements. After that, the surface can safely hang Wallpaper. If You want to achieve gloss from plaster Rotband, it is necessary to do the following: after 2.5 – 3 hours after application of plaster to the surface, apply a hydrating layer of water, and then again to smooth out the applied compound with a metal grater.
Professionals know this, but You may not usely to hear that the applied gypsum plaster Rotband do not have to leave in a perfectly homogeneous and smooth, as You caused it. Many people like to give caused weight various forms, and even drawings!
All you need to do is roll textured roller, student at not yet fully solidified mass, or be creative and draw a variety of patterns with the help of tools available to You.
If You want to get the desired result in the shortest possible time, to quickly dry the plaster suggest to provide high ventilation areas. In the case of using variations of decorative plasters, should the area of application pre-coated primer.
Probably the main question that torments all after applying– this is how much dry plaster Rotband? Reply at once that full drying time is usually about 7 days, depending on external conditions.
Also, do not use a few times already contaminated containers and equipment for application of plaster. All this will only reduce the time «life» plaster mass, so try to clean your tools after each layer of plaster.
- Capacity plastic 50-125 litres;
- Special mixer for mixing plaster (Power more 800 W);
- Construction trowel stainless steel;
- Falcon for plastering;
- A rule made of aluminium h-profile;
- Rule aluminum trapezoidal;
- Grout from the sponge material;
- Comb for plastering.
- The admissibility of the application for some time:
- max: 50 mm;
- min: 5 mm.