Drywall in its modern form, patented by American Clarence Watson, greatly simplified the holding of a number of finishing construction work. However, its main disadvantage – high hygroscopicity – significantly limited the scope of the use of this material, in connection with which, for more than half a century, he did not receive mass use for more than half a century. The situation in the fundamentally changed only with the entering the market of advanced types of drywall – primarily a fire -resistant and moisture -resistant options. It was especially important to use moisture -resistant drywall in an unheated room, for which a separate moisture -resistant putty for drywall, or other more expensive and complex materials (for example, lining) was previously used.
Moisture -resistant drywall – technical characteristics, marking, dimensions
Structurally drywall with increased moisture resistance is a layered “pie” based on two -water gypsum (more than 90%), cardboard (almost 6%) and special additives. This composition makes this material light enough, environmentally harmful, convenient to process and installation and, if necessary, endowed with various auxiliary characteristics (fire resistance, increased strength and/or soundproofing parameters). In addition, the edge can be made in the form of a semicircle with refinement, which greatly simplifies the sealing of the joints. Marking, according to the State Standard 6266-97, divides all types of drywalls by the level of quality into higher (literal “A) and lower (LOC” B “). Now in the vastness of the Russian Federation, the products of such manufacturers as West German Knauf, Finnish Gyproc and the French Lafarge Group are most in demand. At the same time, the abbreviation GKLV distinguishes moisture -resistant drywalls from traditional GCL and fire -resistant GCllasses.
The size of the sheet of dry -resistant drywall (in the standard design) is located in the range from 2500x1200x6 mm to 4800x1300x24 mm, although the lion’s share of the market is occupied by 3 and 9.5 mm thickness.
What is the difference between a moisture resistant drywall and the usual
In addition to the characteristics similar to traditional drywall, the moisture resistant has a number of differences. The main of them is to use in the manufacture of a moisture -resistant version of not ordinary, but impregnated cardboard and a whole list of antifungal, hydrophobic and other impregnating additives. The result of such a modification becomes 10 times larger than the moisture resistance of GKLV.
Besides:
Visually (in addition to marking and the composition of the impregnation), GKLV is characterized by a greenish color of sheets (unlike brownish-beige in ordinary GKL);
moisture-resistant sheets by about 10%, or 2-3 kg heavier (due to the high density of additives);
GKLV has a larger range of standard sizes;
and predictably – a higher price.
Summing up the above, among the significant advantages of GKLV it is worth noting:
simplicity and high installation speed;
relatively small value;
non -combustibility;
high sound absorption;
flexibility;
maximum (among all popular building materials) ease of use as a basis for all types of decoration;
environmental safety;
multivariance of permissible architectural solutions;
Areas of application
It is obvious that such a list of advantages turns GKLV into magnificent material for starting decoration of bathrooms, bathrooms, kitchens, not heated rooms, slopes for doors and windows and other places where the use of ordinary drywall is unacceptable due to excess humidity.
Everything that is necessary for a long (up to several decades) operational use of moisture -resistant GCLV is a reliable surface coating and high -quality ventilation in the room.
Do -it -yourself installation instructions
Which side to fix the moisture -resistant drywall?
The answer to this question depends on the constructive solution of certain types of sheets associated with ensuring the convenience of their docking and expressed in the form of the edge profile. A rounded version is created for putty without a reinforcing tape, additionally sophisticated – for putty with a ribbon, and a rectangular does not provide for a seal at all. As a result, it turns out that the side should be provided with the side with the chamfer (as a rule, it looks lighter visually).
Among all other building materials, drywall (both ordinary and moisture-resistant) is a champion in the simplicity of installation, which does not only require any special tools, but also special skills. In fact, there are only two ways to install GKLV sheets (photos and videos in this article): there are only two:
gluing on the wall (or other basis) on gypsum mastic;
Fastening with self -tapping base on the frame base (made of aluminum profile, wooden beam or other materials).
In addition, with the planned installation on the walls, sheets of drywall on one side are profiled by removing champs. At the same time, joints are put down (using or without reinforcing tape), in the latter case, grinding after the composition dries. After that, the plasterboard coating becomes completely ready to further use it as the basis for pasting wallpaper, laying out mosaics or tiles, applying the paintwork, etc.
The technology for the formation of coatings from GKLV with non -equal curvature (concave or convex) consists in severe moisturizing the sheet, bending it to the state of acceptance of the desired shape and reliable consolidation until the moment of complete drying out. The moisturizing process is carried out as follows:
For quick impregnation of the sheet with moisture, in the places of future folds, a roller equipped with metal needles is repeatedly rolled along it;
The sheet perforated in this way is covered with a thick wet cloth – repeating the procedure several times to achieve the required level of impregnation.
How to choose moisture -resistant drywall
It is obvious that the choice of sheets of moisture -resistant drywall with certain configuration parameters depends on the set construction tasks. The most fundamental characteristics are the thickness of the leaf and the shape of its edge. So, regardless of linear dimensions (length and width), in the walls and partitions a thicker GKLV is used – from 12 mm. In ceiling floors, the thickness requires a smaller one – about 9 mm. Finally, when setting the goals of the formation of arches and other structures with non -equal curvature from it, you should opt for the thinnest options – about 7 mm (in order to avoid a fracture of sheets with significant angles of bending).
As for the shape of the edges – direct options that do not involve docking are used mainly on the walls and ceilings. Rounded and refined options, respectively, are selected with production need to carry out further butt plastering. Reinforcement is usually about 20-25 °, which is achieved by cutting the edge by about 2/3 of the sheet thickness. If it is planned to use not only putty, but also reinforcing tape, the GKLV sheet is cut off from the end in the same way as the traditional drywall – exactly to the width of the Armlets. After that, for obtaining a sophisticated edge and at the end, the core is wiped to the desired level with a gypsum cardboard.
