increasingly displace traditional gypsum plaster, or cement and lime. What are the main reasons for this state of affairs? ... since they are often cheaper, kl Ada to them much faster and according to experts, including friendly Allergy.
Gypsum, commonly used for surface finishing of walls and ceilings inside the living quarters, a large group of different properties of utility and purpose. Selection of an appropriate product should therefore take into account the nature of the work and purpose of finishing plastered rooms.
Currently there are so many varieties of gypsum plaster, it is difficult to make a clear division. Frequently they are divided according to:
1) the method of application:
- hand - applied manually,
- Mechanical - imposed mechanized way, through appropriate plaster aggregates;
2) thick layer of plaster:
- usual - with a thickness exceeding 6 mm,
- thin (coats) - with a thickness of 6 mm;
3) type of filler :
- ordinary
- light - including lightweight aggregates (with a bulk density below 800 kg/m3);
4) destination:
- ordinary
- Special - showing properties Special, of which we have:
- plaster (mortar) with fiber (C1),
- plaster for sound insulation (C3),
- Plaster for thermal insulation (C4),
- flame retardant plaster (C5);
The gypsum plaster also includes plastering limestone and gypsum-anhydrite, which have similar properties, and applications.
Gypsum are currently the most commonly performed expeditions walls and ceilings. Their popularity has decided above all easy to apply, fast drying time and the possibility of obtaining completely flat, smooth surface. It's certain advantages, however, there is no denying that, in comparison with conventional plasters have a lower resistance to long-lasting moisture and mechanical damage. Let us, therefore, has several advantages and disadvantages of plaster.
gypsum plaster ADVANTAGES:
- are easy to lay, and applied to them quickly (just one layer) so that in one day can be performed even 150 m2;
- most cases is no longer necessary finishing coats the walls because the surface itself is very smooth (but it obviously depends on the investor's own preferences);
- not inhibit the flow of water vapor through the walls;
- are considered healthy, because they can regulate the level of humidity areas, thereby improving the microclimate inside;
- have good thermal insulation (the thermal conductivity is very low as it reaches 0.25 W / (mK), and it is known that the lower is this ratio, the more advantageous;
- are white when dry, so if we paint the walls a bright paint, its consumption is thus slightly smaller;
- protect against the spread of fire because the 2-cm layer of plaster can withstand fire for about 20 minutes;
- suitable for decorative invoicing.
FAULTS GYPSUM PLASTER:
- plasters are less robust in terms of mechanically from the plaster, which the main binder is cement;
- are not resistant to water and humidity constant, so when humidity levels exceed 80%, gypsum begins to lose its strength;
- not seal the walls, like other types of plasters,
- unprotected steel corrosion in contact with the plaster begins to rust.
Ready mix gypsum plaster are plastic, easy to process, exhibit good adhesion. Obtained thanks to the single-layered plasters are equal, smooth and fairly hard surface - making the perfect base for paint, wallpaper and ceramic tiles.
Another important issue is "where it can be arranged such as plasters and when you really start ...?" .
Gypsum can be placed only inside the house. They are suitable for all media, provided that they have sufficient capacity.
Probably many of us ask ourselves whether, therefore, gypsum plaster can be laid in the bathroom. Yes, if the humidity will not exceed 70% there and will not keep still. Gypsum plaster absorbs moisture, but also gives it very quickly when the air becomes drier. Therefore acts as a buffer. Gypsum and should not be used in places where they are constantly exposed to mechanical damage - in garages, workshops, etc. You should rely on a less visually attractive, but more durable cement - limestone.
most favorable period for plastering shall be the period from spring to autumn. The important thing is to start work only after 3-4 months after completion of the house. The walls have to settle and stabilize. The specific case of a substrate made of concrete, which should not be finished with gypsum plaster, if their performance had not passed a minimum of 2 months. It is clear that the company should call the plaster until you are finished the initial installation works - were distributed and made connection cables. Well that has already been inserted outside doors, windows and frames internal doors (except quite often seen out with MDF frames that can be inserted after wytynkowaniu walls, a rear frame and a final treatment performed at the end. High humidity in the room during the drying plaster could cause "swelling" of such frames and their damage) . In the spring and autumn in the plastered interior should have a functioning heating.
Robercik72
http://mojwymarzonydomek.blogspot.com/
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