One crucial step that is frequently missed before plastering walls is priming. Priming may seem like an extra step, but it’s essential to the smooth and durable finish of your plastering project.
Plaster adheres more successfully to walls that have been primed because it improves the bond between the plaster and the surface. This results in a wall that is stronger overall, has fewer cracks, and a more even finish.
Selecting the appropriate primer can have a significant impact. To achieve the best results, you’ll need to use a specific type of primer depending on the type of wall material. In the future, you’ll save time, money, and effort by knowing what to look for in a primer.
| Reason for Priming | How to Choose a Primer |
| Improves plaster adhesion | Select a primer compatible with your wall material |
| Reduces plaster absorption | Use a water-based primer for porous surfaces |
| Prevents plaster cracks | Opt for a primer with sealing properties |
| Enhances plaster durability | Choose a primer that resists moisture |
- Do I need to prime the walls before plastering?
- How to choose soil
- Sequence of work
- What can you choose
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Do I need to prime the walls before plastering?
In construction, priming walls refers to giving them a unique composition. This is carried out in between layers, prior to decorative finishing, and before the leveling plaster is applied.
Priming is not a pointless step in the process that can be omitted. It is required because
- Strengthening loose plasters, for example, lime. Strengthening impregnation penetrates deeply into such material and makes it stronger.
- Dust removal. As a rule, there is dust and small particles on the wall that worsen adhesion to the finish. Primer glues all the dust on the surface, reducing the likelihood of peeling of the plaster in the future.
- Improving the adhesion of plaster and smooth surfaces, such as concrete, gypsum board, etc.
- Increasing water resistance. Primer closes the pores, prevents the base from absorbing water from the plaster solution, allows the plaster to dry evenly.
- Preventing mold due to the antiseptic in the composition.
- Saving material. On primed walls, the material takes longer to set, extending the time of working with it. Less unused solution remains.
Therefore, smooth surfaces to improve adhesion and porous substrates to minimize water absorption must always be primed before plastering. In response to the query, "Is a primer necessary or not before plastering?", I say that it is.
How to choose soil
Let’s examine the primary categories of primer solutions and their characteristics:
- Universal. Such acrylic-based material can be used in relation to any surfaces except wood and metal. The composition of this primer provides increased adhesion, improved strength and protection against mold (if the composition contains the appropriate additive). Dries quickly and has no unpleasant odor.
- Deep penetration. This impregnation is used mainly on loose and crumbling plasters. Penetrating deeply into the pores, the solution slightly strengthens the wall, increases water-repellent properties. This material dries quickly and does not have a strong odor.
- Adhesive primer type betonokontakt. It allows to significantly improve the adhesion of materials due to quartz sand in the composition. After the primer solution dries, a rough surface with good adhesion is formed. This is required when leveling concrete walls with gypsum plaster, when gluing tiles to plasterboard, as well as when finishing smooth materials, such as fiberboard, OSB boards, etc.
Before plastering and puttying, these three primary primer types are applied to walls in interior construction projects.
Sequence of work
The following sequence applies to all finishing work:
Base primer – cement or gypsum leveling plaster; – primer Putty – primer once more – ornamental layering (plastering, paint, or wallpaper).
Crucial! If the plaster layers are not leveling simultaneously, they are primed in between.
It is essential to prepare the surface before beginning work:
- completely remove all peeling old coatings
- clean with a brush, dust the surface with a damp cloth or vacuum cleaner.
Apply the following primer to the walls:
- If a primer concentrate is used, it must be diluted in accordance with the instructions. The proportions depend on the percentage of dry residue of polymers in the solution.
- Pour the primer into a cuvette (tray) or other container.
- Dip a paint roller in the solution, squeeze out the excess.
- Roll the roller along the wall from bottom to top so that a thin film is formed. The liquid should not flow or accumulate.
- It is more convenient to prime the corners with a brush.
- Leave the treated wall to dry. If necessary, apply a second layer no earlier than after 4 hours. This is relevant for aerated concrete and foam blocks, which are primed twice to close all the pores. Further plastering can be started after 12 hours, when it is completely dry.
To ensure that the plaster adheres correctly and lasts longer, walls must be primed before plastering in order to create a strong, even surface. By keeping the wall from absorbing too much moisture from the plaster, it helps to seal the wall and reduce the risk of cracks and subpar finishes. The type of plaster being used and the type of wall material will determine which primer is best, so it’s critical to select a composition that best meets your needs in order to get the best results.
What can you choose
These are a few samples of trustworthy manufacturers’ primer compositions.
As we can see, the majority of the product line’s brands use quartz primer to increase adhesion along with acrylic impregnation compositions. Consider whether the amount of dry residue in the solution is indicated when making your selection. By using this indicator, you can determine the amount of material that will be used, or how many layers of primer will be needed. We’ve written more about this in our article.
Present rates:
Prior to plastering, priming the walls is a crucial step that can significantly alter the outcome. It lessens the possibility of cracks and other flaws by improving the plaster’s adhesion to the wall. By priming thoroughly, you’re laying the groundwork for a smoother, more durable finish.
Selecting the appropriate primer is also essential. The type of surface you’re working with and the plaster you intend to use will determine which primer is best for your project. Not all primers are created equal. A quality primer will seal the wall, stop problems with moisture, and provide the perfect surface on which the plaster will adhere.
Priming may seem like an extra step in the end, but the work is worthwhile. It guarantees that your plastering project will look better and last longer in addition to being simpler to apply. Thus, don’t cut corners on this crucial step of the process; the quality of your finished walls will thank you for the little time and money you’ll save.
