In modern construction, various types of dry plasters made on the basis of gypsum are widely used. They are used for finishing the internal surfaces of rooms. Gypsum plaster called iso gypsum is especially popular.
What is this material
Isogypsum is a starting dry mix made on the basis of a natural natural binding material - gypsum. Also included are mineral fillers and various additives. Putty starting differs from other types of coarse grinding of the main components that are part of it. It is an indispensable material in construction and repair.
Gypsum plaster, the price of which depends on the manufacturer, is mainly sold in bags of 30 kg. The cost of such an amount of dry mix varies from 250 to 400 rubles.
Gypsum Plaster Properties
Isogypsum is a high quality mixture without a pungent odor. Its properties do not contribute to the growth of mold, fungi and bacteria. The material in its structure is elastic, does not shrink, is compatible with all acrylic emulsions, and is convenient to use. Indoors, where humidity is high, it is able to absorb moisture, and return it at high temperature. Isogypsum is a material that, thanks to its porous structure, saves heat and absorbs sound. As you can see, there are many advantages.
Gypsum plaster, the price of which is affordable for every consumer, has the following basic properties:
- extension of setting and processing time;
- white;
- excellent heat and sound insulation properties;
- environmentally friendly product.
Stucco application
Where is it used? Isogypsum is a material intended for plastering, leveling surfaces made of brick, concrete, foam concrete, combined walls or ceilings indoors. Using it, it is possible to mask cracks, seams, fill holes and other significant defects, and also hide bumps on the surface. It is used in the treatment of internal surfaces of the premises as a preparatory layer before applying the finish coating.
Surface preparation
Before applying gypsum plaster, prepare the surface - clean the walls of dirt, old paint, weak plaster, dust and degrease if necessary. To improve adhesion, the surface is treated with a primer so that it covers the entire wall without gaps. In order to avoid peeling of the starting plaster from the surface, experts recommend purchasing a primer emulsion of the same company as the putty. The quality of the finish depends on it.
All metal structures under the plaster must be coated with oil paint to avoid the appearance of red spots. The surface should be dry after processing.
Solution preparation
To prepare the solution, it is necessary to fill a clean container with water, then pour isohypsum (10 kg of dry mixture and 6 liters of liquid) and wait 2-3 minutes. Stir the mixture until a homogeneous solution is obtained using an electric drill or hammer with a nozzle (whisk). A thicker solution should be prepared if necessary to hide deep irregularities on the surface.
Putty starting to be used within 80-100 minutes, the time of complete solidification - 140 minutes. Material consumption 10 kg / m 2 with a applied layer thickness of 10 mm. Do not prepare the solution in large quantities, as the mixture dries quickly. Do not use hardened putty.
Gypsum plaster application
If the walls are very curved or there is no necessary degree of angle, it is necessary to put beacons before the putty. They are located after 1-1.5 m depending on the length of the surface. Then a solution is poured between the beacons and pulled up by the rule. If the walls are relatively flat, you can putty without them. The solution is applied with a metal large and small spatulas with a layer of 5 to 30 millimeters. If the thickness of the plaster layer is more than 30 mm, it is recommended that a reinforced fiberglass mesh be applied to the surface, which will prevent its peeling and cracking.
On the walls, putty starting is applied starting from the corner or from bottom to top. The ceiling is finished in the direction of yourself. Thus, the surface extends in a straight vertical or horizontal line. Putty should dry for about a day, while it must be ensured that there are no drafts in the room and exposure to direct sunlight. After drying, the plaster must be rubbed with sandpaper or a special mesh 100-150. This is necessary in order to eliminate traces of the spatula and to give the surface a flatness.
If you bring a luminous bulb to the wall, you can check the quality of the putty work. The shadow shows well grooves and other flaws. Smooth surface is ready for applying putty.
Isogypsum is quite popular with buyers. Due to their excellent properties, builders prefer gypsum plasters, the reviews of which are very good among professionals.