How to calculate the consumption of facade paint per 1 m2 and what factors to consider
All work on painting the exterior fragments of buildings necessarily involves calculating the consumption of facade paint per 1 m2. This saves your family's budget and time significantly. It is unprofitable to buy paint with a markup, as this will entail significant costs. If the dye is not enough, you will have to buy it, which is also not always practical. Therefore, when calculating the throughput, a number of characteristics should be taken into account.
Varieties of facade paint
Facade paints are of different types. They are used for exterior decoration of buildings and structures. At the same time, a material should be chosen taking into account the specifics of the structure and other parameters.
By type of solvent
Depending on the type of solvent, the following dye types are selected:
- Dispersed in water. Such dyes include small particles of the working composition, which are whipped with water until a fine suspension appears.During application, part of the moisture is absorbed by the base and the other part evaporates. The formed film forms a durable coating that resists moisture. The advantage of such substances is the absence of a pungent odor. In addition, traces of paint can be removed with clear water.
- Substances based on organic solvents. Such materials are characterized by the presence in the composition of chemical solvents - in particular, white spirit. These dyes have certain advantages. These include glossy and dense shades, surface gloss, increased water-repellent characteristics. They are also allowed to be used in the cold season and with high humidity. However, the materials have a strong odor and have a long drying time.
By base material
Depending on the base material, the following types of facade stains are distinguished:
- Mineral. Various finely ground minerals are used as a pigment for such substances. These include cement, lime, chalk, talc. Most often, these materials are produced as mixtures dispersed in water. They are characterized by increased vapor permeability, resistance to low temperatures and relatively low price.
- Silicate. The basis of these dyes is liquid glass. The material is characterized by a two-component composition. The ingredients are mixed before use. The finished composition should be used in 8 hours. These dyes are characterized by resistance to temperature and climatic factors. However, they emit many toxic substances and are considered highly flammable.
- Silicone. These substances are characterized by an increased degree of elasticity. This helps compensate for vibration, shrinkage and other wall movement.In addition, the material is highly water repellent. This allows it to be used in areas with high pollution. The main disadvantage of the substance is its high cost.
- Acrylic. These materials are made on the basis of acrylic resins, as well as their derivatives. They have many types, are easy to use and have a relatively low cost.
How to correctly calculate the consumption of plaster
The consumption of facade paint is considered quite an important parameter. The exterior cladding is subjected to increased loads during its service life, which reduces its durability.
Certain absorbent properties are characteristic of plaster substrates. Applied dyes can be absorbed quite strongly, which will require the use of not two layers, but three or even more.
In the case of using acrylic material per square meter, 100-150 grams of the product is required.
For other substances, the consumption varies from 150 to 400 grams.
At the same time, the properties of plastered walls can differ significantly. Thus, silicone plaster is characterized by less absorption compared to sand-cement.
Consideration of additional factors
To correctly determine the consumption of materials, it is necessary to take into account a large number of factors.
Manufacturer data
Manufacturers indicate different information on the packaging. But, in general, they relate to precautions, benefits, purposes of use. Much of this information is reflected in material consumption. Thanks to the descriptions, it is possible to select the most suitable product.
Workbook contents
Regardless of the type of dye, the more binder it contains, the better the product under consideration.
Water absorption coefficient
This parameter should be as small as possible - about 0.05 kilograms per square meter. The lower this indicator, the more resistant the coating becomes to the influence of moisture. In addition, the surface is not so heavily contaminated.
UV resistant
Excessive sun exposure causes discoloration. In this case, cracks and swelling appear on the surface. The most resistant are acrylic, polysilicate and silicone-acrylic dyes.
Vapor permeability
Each layer of the wall must be vapor permeable. This is considered an excellent feature. Manufacturers usually indicate the amount of water vapor that can pass through the wall. The higher this parameter, the more breathable the dye. This indicator should be more than 100 grams per square meter.
Abrasion resistant
This indicator is indicated in washing cycles - dry or wet. The more cycles, the better. This parameter is about 5000.
Drying time
The dye description usually indicates when the next coat is allowed.
How to properly prepare a surface to save paint
Properly carried out preparatory work can save up to 20% of materials. To do this, it is recommended to proceed as follows:
- remove the old coating;
- remove ruined fragments;
- clean the surface from dust and dirt;
- cleaning and disinfecting areas affected by mould;
- remove rust from metal;
- align the base;
- prepare the surface.
Molds can penetrate the structure of porous materials. Therefore, it is so important to remove them not only from the affected areas, but also from adjacent areas.
For the successful application of paint, the following rules should be observed:
- Facade work is carried out at a temperature of at least +5 degrees.
- It is important that the walls are completely dry. Therefore, it is important to adhere to the temporary norms of drying plaster and not to paint the surface after rain.
- For application, use only new tools - rollers or brushes.
- Each subsequent layer is applied perpendicular to the previous one. In this case, it is recommended to alternate directions.
- The next coat should not be applied until the previous one has dried, as there is a risk of cracking.
- Do not work in windy weather, as dust will settle on wet surfaces.
- It is worth starting the application from the upper parts of the facade.
Before carrying out repair work, it is important to calculate the consumption of dyes. It will save you time and money. To achieve an accurate result, it is important to consider the basic nuances.