To create smooth and smooth walls in the building during the construction phase of multi-apartment buildings, plasterboard sheathing is used. The level of moisture resistance and fire resistance of the coating depends on their quality. Therefore, professionals prefer plasterboard sheets made by the famous German company Knauf.
After finishing the room with such material, a space with perfect walls is obtained. But the joy of the work done can ruin the unsightly appearance of the joints between the sheets. The cause may be oblique sections along the edges of the material.
There is a simple way out of this situation - to plaster the surface of the sheets with mixtures intended for GKL joints and use a reinforcing tape.
It is important that both the tape and the mixtures are ideally suited for Knauf drywall, because it depends on the compatibility of building materials whether the result of the repair will be successful or failure.
Proper design of the joints formed during the installation of drywall sheets, guarantees not only aesthetics, but also the strength of the structure, because any damage can cause small but dangerous holes and cracks.
Why do we need reinforcing tape
If the walls were putty without reinforcing, after some time, due to temperature differences, the plaster at the points of contact of the sheets will crack. In the future, these gaps will only increase, which will lead to the need for a new, better repair.
That is why it is necessary to use a reinforcing tape for drywall. In addition, the use of this material contributes to the formation of a smooth and even surface.
Types and characteristics
Recently, builders have preferred several types of tapes.
Perforated paper tape is a very reliable fiberglass reinforced paper. In order to provide the best grip, the manufacturers made the adhesive side rough, that is, perforated. To make sizing of corners more convenient, the material was equipped with an indented fold in the middle, so the tape is used as an angle forming tape.
Knauf can also offer a special Knauf-Alux corner protection tape, which is made of special paper with metal inserts. Such a tape can withstand both stretching and creasing. It can be called sealing, as it is often used to strengthen and increase the strength of structures. Such a tape is sold in rolls of 50 m, 75 m or 153 m.
However, this material has minor flaws. The process of mounting paper tape is quite time-consuming. If you do not have experience in using such a material, air bubbles may form during the sizing step of the seams under the tape. The reason may be an insufficient amount of putty under the tape. Therefore, it is necessary to carefully lubricate all the joints with a joint mixture. It is also better to choose micropunched paper tape.
Self-adhesive serpyanka - a mesh produced in strips of 45 or 50 millimeters wide. No special compounds are required for gluing this material, since it already has an adhesive base. Serpyanka is made of fiberglass fibers that are particularly reliable, rolls of 20, 45 and 90 meters in length.
Knauf-Fireboard reinforcing fiberglass tape for boards and various joints can be a great example of a sickle.
You can buy a cheaper option - without a strip of glue. Such products, in turn, are secured with a construction stapler.
In addition to the advantages, the sickle has several disadvantages:
- lower strength than paper tape;
- the importance of choosing a solution that is absolutely suitable for sickle;
- the need for thorough cleansing of the joints (otherwise “wrinkles” may form);
- the need to monitor the uniformity of the distribution of the putty layer throughout the joint.
When using a self-adhesive serpyanka in the procedure at the end of work, it is better to pack the rest of the tape in a plastic bag. Otherwise, the glue will dry over time, and the material will subsequently be unsuitable for use.
When choosing a material for sealing joints, you need to pay attention to an important feature. Longitudinal seams on drywall are sealed with serpentine, and transverse seams with paper tape.
If it is necessary to put drywall on the floor, then for successful installation you will need a damper or waterproofing tape. It is made of foamed polyethylene with the ability to taper. This gives the material the opportunity to significantly compensate for the expansion of gypsum plasterboard floors.
Interestingly, it was Knauf who first proposed to line the floor with drywall.
This solution has a lot of advantages:
- Installation is made on a dry floor. This makes it possible to exclude constant humidity in the premises.
- Installation can be easily and quickly done independently.
- Drywall does not load the overlapping plates, since the material has a small mass.
- The low price of drywall sheets is a nice bonus.
- The material is easily and simply processed.
- Drywall sheets enhance sound and heat insulation.
However, drywall sheets are very porous. Moisture easily penetrates into them, because of which they can swell. Therefore, between the wall and drywall, it is necessary to lay a special waterproofing tape, for example, Knauf Flehendihtband, designed for waterproofing the joints of walls and ceilings.
For Knauf drywall, it is better to choose embedments from the same manufacturer. For example, you can buy Knauf-kurt tape in rolls of 25 m. Or paper tape 52x150xS. The latter is made of special white paper, which includes reinforcing synthetic fibers.
Installation of paper tape is carried out in a certain sequence:
- First you need to apply a thin layer of putty, but only on the joint that it was decided to close up at the moment. Putty can not be applied immediately to everything, otherwise the mixture will dry and become useless, and the work will be more difficult due to the possible occurrence of air bubbles.
- The grid is regulated by two seams in the center. You need to keep it constantly tight. With a little effort, you need to pin the tape to the putty layer. The ends of the material must be overlapped.
- Then it is necessary to smooth the tape with two spatulas, strictly following from the center to the sides of the seams. It is important to make enough effort so that the material adheres securely to the joint, and an excessive amount of solution extrudes outward. About 0.8 millimeters of the mixture should be under the edge of the paper, and about 2 millimeters under the center. It is important to note that if too much mixture is squeezed out, the tape will not be able to stick.
- After the successful completion of all the manipulations, you need to remove the excess putty from the edges.
- After some time, you need to finally smooth the seam with a spatula with a wide blade (more than 100 millimeters). It is important that the seam does not go beyond the plane of the drywall.
- At the end of the work, it is necessary to sand the layer well.
Installing a self-adhesive mesh requires much less time. This is due to the lack of risk of air bubbles. The process itself is also divided into several stages:
- Before starting installation, you should prepare a putty mortar and apply it with a thin layer on the joint, using a spatula with a width of 40 to 50 millimeters.
- Then, without delay, you need to attach the edge of the grid to the upper edge of the seam and press it slightly onto the plaster. At the same time, you can not press hard. This can cause the appearance of “wrinkles” on the grid or lead to damage to the tape from strong mechanical stress.
- The roll should be unwound to the bottom, sticking the tape along the gypsum board and smoothing it with a spatula.
- At the floor, the net must be cut.
- Then you should again “walk” along the grid, smoothing the creases that have arisen.
- On top of the sickle you need to cover with another layer of plaster and leave to dry completely.
Self-adhesive serpentine can simply be fixed on a dry surface and covered with a thin layer of plaster on top.
Installation of the damper tape must be done slightly above the level of the floor screed. Typically, when laying gypsum plasterboard on the floor, builders leave a small gap of about 1 centimeter wide, into which they then lay the waterproofing tape and stick it in the gap between the wall and the floor. After that, the tape is filled with dry powder for installation.
Reviews on Knauf materials are extremely enthusiastic. This is natural, because the reinforcing tapes produced by the company are of high quality.
Manufacturing technologies that are far ahead of their time ensure the reliability and strength of the tapes, as well as the convenience of the material in use.
Satisfied customers who use reinforcing tapes suitable for it for Knauf drywall confirm all these characteristics.
See the benefits of Knauf drywall tape.