How to determine the consumption of putty per 1 m2 for: plaster, plasterboard, concrete, for painting

It is essential for a successful and efficient process to know how much putty you will need for your project. Knowing how much to use when working with concrete, plaster, or plasterboard will help you avoid waste and get the best results.

Putty consumption requirements vary depending on the material. The type, texture, and thickness of the putty are some of the factors that affect how much is needed per square meter. Accurately completing these details will help you save time, energy, and money.

This guide will walk you through the specific needs for different surfaces. We’ll cover how to calculate the amount of putty for plaster, plasterboard, and concrete, and offer tips to help you prepare for painting. With the right information, your project will be smoother and more predictable.

Surface Type Putty Consumption per 1 m²
Plaster About 1-1.5 kg
Plasterboard About 0.5-1 kg
Concrete About 1.5-2 kg
For Painting About 0.5-1 kg

Features of putty and plaster

Mixtures for putty and plaster have different ingredients, uses, and application guidelines.

The use of these materials in combination allows you to level the base, eliminate cracks and chips. The plaster layer precedes the putty layer. The compositions are used to perform high-quality repairs of surfaces for applying decorative plaster with imitation marble, silk-screen printing, performing artificial aging techniques, etc..

Painting the bases requires careful leveling and a methodical application of surface treatments (water-dispersion, alkyd, acrylic). Painting is done as soon as the bases are processed. Following preparation, less paint is used per square meter.

Technical attributes state that putty dries quickly, is resilient to moisture, and is long-lasting. Small and large cracks in the base can be sealed with the material. It is crucial to take the mixture’s intended use into account when selecting a mixture (for interior or facade decoration).

Putty consumption per square meter for concrete, plaster, and plasterboard, as well as for painting, must be precisely calculated taking into account the kind of surface, its state, and the type of putty being used. Putty is needed in different amounts for different surfaces; surfaces that are rougher or more uneven will typically require more putty. Comprehending these variables facilitates project planning and budgeting, guaranteeing a seamless and effective application procedure.

What determines the consumption per 1 m2 of wall

  1. The condition of the wall panels – the greater the number of protrusions, cracks, rough areas, uneven blocks, the greater the consumption of the putty mixture will be (since the thickness of the composition increases).
  2. Type of subsequent finishing – painting, whitewashing, wallpapering. Tinting surfaces with paint requires a large consumption of putty per 1 sq. m.
  3. Experience of the specialist – beginners in finishing work consume more putty mixture, unlike workers with experience.
  4. Place of work – when finishing facades and panels in rooms with high humidity, facade putty based on cement powder is used, the consumption of which is higher than gypsum. When performing interior finishing works, gypsum dry mixes are used, which must be diluted with water, and ready-made putties, characterized by low consumption of the composition.
  5. Stage of puttying — to eliminate irregularities and cracks in the base, a starting solution is used, which is characterized by high consumption. Universal putty mixture has a lower indicator. Finishing putty is used to level the prepared base for painting or gluing wallpaper, so it is consumed in small quantities.
  6. Type of base – wall panels will require more putty than ceiling slabs.
  7. Material composition – more cement powder-based products are required than alkyd putties. Gypsum putty has an increased consumption. Less adhesive putty is required to order.

A portion of the solution will remain on the instruments and in the containers for diluting the mixture, so this must be considered when calculating the volume of material.

Consumption of starting putty

These mixes are used on plastered surfaces and are used ahead of finishing. Because the compositions are made of lime and gypsum powder, they are frequently characterized by large fractions. Due to the high rate of consumption, the starting putty mixture is produced by manufacturers in 25–42 kg bags. The material has a pasty consistency; 400 ml of water is needed to dilute 1 kg of it.

The initial putty consumption will be as high as 1-1.4 kg per square meter when the mixture is applied to the wall panel in a layer of one millimeter. Generally speaking, one 30 kg bag is sufficient for the first puttying of a 20–20 m² area with minor flaws. A bag will cover an area of 4–7 m², though, because the putty used to repair damaged panels will be at least 0.5 cm thick.

Prior to puttying, it is advised to ascertain the necessary thickness of one layer. The typical indication only rises to a height of 0.5–1 cm. Should the thickness of the layer be exceeded, the final mixture might crumble.

  • Knauf HP Start putty can be applied in a layer of 10-30 mm, with a coverage of 10 mm on an area of ​​1 m², about 7.5 kg will be required;
  • Ceresit CT 29 starting mixture is applied in a thickness of 2-20 mm, with a layer of 1 mm, up to 20 kg of product will be required;
  • the Polimin SHG-11 mixture is used to produce a 3-10 mm coating, the consumption for a 1 mm layer will be more than 1 kg;
  • SATYN PW-01 – permissible coverage up to 8 mm, with a layer of 1 mm, the consumption of the product will be 1.3 kg.

Consumption of universal putty

After the surface has received initial treatment, a universal putty mixture is applied. As a result, finishing putty is not required. One square meter requires 1200–1500 grams of putty. The product is packaged; each bag has a 20–25 kg weight. About 15-20 m2 of wall panel need to be finished, so 20 kg of the mixture are needed.

— 1200 g of gypsum products are used for every 1 m³. A base area of 20 m² will require a package weighing 25 kg.

Consumption of finishing putty per 1 square meter

This particular mixture is meant to level walls and ceilings prior to painting or applying decorative plaster. The product is made as a powder or as a ready-made composition and is packed in 8–25 kg buckets. The powder must be diluted in water at a ratio of 1:1.05 in order to create a solution from dry material.

Depending on the technical characteristics of various manufacturers’ compositions, finishing putty consumption varies:

— the substance is used to adjust the joints between plasterboard sheets during interior finishing projects. The coating is applied in a layer ranging from 1 to 5 mm and does not shrink or crack. Up to 300 g/m² is sufficient for finishing ceiling slabs; up to 500 g/m² will be needed for partitions. Size of package: 5–25 kg.

Consumption of ready-made mixtures for walls

This kind of putty is used to level ceiling slabs and remove minor wall imperfections. The mixtures are made up of vinyl components and plasticizers, which raise the degree of surface smoothness. After application, the material dries fast and doesn’t break. The solution’s benefit is that it doesn’t require dilution in order to be finished.

How the surface affects the consumption per square meter

The base material needs to be considered in order to calculate the amount of solution consumed. When applying putty to plastered surfaces, concrete floors, plasterboard, wood, chipboard sheets, MDF, etc., the putty mixture’s volume varies.

Plaster

The amount of putty needed per square meter on plaster is determined by the base’s quality, the existence of preliminary preparation, and an estimation of the application layer’s intended thickness. To make adjustments, you can putty just a small portion of the surface or apply a continuous layer to the whole thing.

You will need to apply 0.5 mm of finishing putty and 1 mm of starting mixture to create a smooth base. The dosages for each composition are 1000 g/m³ and 600 g/m². The mixture’s volume will rise as denser layers are added to adjust the base. Up to 11 kg of material will be needed for a putty layer that is 11 mm thick per square meter. The possibility of applying an extra layer (up to 3 mm) is considered during computations.

Drywall

The amount of putty needed per square meter of drywall is determined by the number of joints where the design solution is intended to be implemented. The self-tapping screws that are used to mount drywall ceilings must be concealed when processing with a solution. Starting and finishing compositions is required for the task.

  1. In rooms with high humidity, a putty with a cement base is required, the consumption of which is from 1100-1200 g per 1 m².
  2. For dry rooms (bedroom, living room), polymer putties or gypsum mixtures are used. The former are used at the rate of 600-1000 g / m², the latter are consumed economically – 500-1000 g / m².
  3. Consumption of putty on plasterboard floors will decrease if the gypsum board sheets are pre-treated with a primer composition.

Concrete

The concrete base needs to be primed before the putty mixture is applied. A maximum of 6 mm of material is applied; the subsequent coat should be roughly 3 mm thick. For a 1 mm layer, the putty consumption rate per 1 m2 is roughly 1-1.5 kg. It will take up to 2-3 kg of material for a thickness of 3-6 mm.

Other bases

The putty layer on wooden surfaces should not be thicker than 2-3 mm. As a result, 1100 g is the volume of material per square meter. Primed wood will adhere better before it is processed with putty, according to experts.

The amount of materials can be lowered after the primer has been applied and allowed to dry. It is important to remember, though, that the makeup of various brands’ products affects both consumption and coating density.

Table with a description of some putties – consumption rate

The indicators from different manufacturers are as follows:

Brand Place of use, description Consumption rate
Sheetrock Interior decoration, the material can be used to correct cracks, chips and as a finishing layer. Characteristics: high plasticity, good adhesion For 1 m² – about 1 l with a layer thickness of 1 mm
Vetonit Interior decoration in rooms with dry air. Characteristics: environmentally friendly composition, application at a temperature of + 10 ° C 1.2 kg / m² with a layer thickness of 1 mm
Knauf Finishing in rooms, not used for bathrooms, toilets. Characteristics: the composition is environmentally friendly, elastic, with a high level of adhesion For a surface of 1 m² and with a layer thickness of 1 mm, it is required
0.8 kg

Tips for preparing the solution

  1. The composition is prepared taking into account the instructions from manufacturer. If the proportions are violated, the consumption of putty may increase. With excess water in the mixture, unaesthetic streaks remain on the surface. An excessively thick solution dries longer than a standard mixture.
  2. The volume of the mixed putty solution is calculated taking into account the use by the master for 30 minutes.
  3. To prepare the mixture, you will need dry putty and water. You will also need a container, a construction mixer or an electric drill with a special attachment operating at low speeds.
  4. To reduce the volume of solution consumption, it is recommended to use clean tools that are wiped after each mixing.
  5. When preparing a solution to eliminate large deformations, cracks, chips, the solution is made thicker. However, this will increase the consumption of the product.

Knowing how much putty you’ll need for the job will help to minimize waste and ensure a smooth finish. Compared to other materials, putty may be needed in greater quantities for plaster surfaces because a thicker layer is frequently needed. This guarantees a level and sturdy foundation for any further finishing.

Because plasterboard surfaces are typically smoother, less putty is needed on them. A thinner layer is all that is needed to cover screw holes and joints, which results in a more economical use of materials.

The texture of concrete surfaces varies, influencing the quantity of putty required. Smoother concrete surfaces will require less putty to fill in uneven areas than rough concrete.

The proper amount of putty is essential when priming any surface for painting. It makes the base even and smooth, which guarantees that the paint will adhere well and look fantastic. When choosing the right amount of putty for your project, keep in mind the kind of surface and its state.

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Dmitry Sokolov

Chief engineer in a large construction company. I have extensive experience in managing construction projects and implementing modern technologies.

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