Priming the walls in front of the putty. How to choose a primer?

Repair is troublesome and expensive. I want to make high-quality and inexpensive. But does it happen? Savings are good, but repairs are not done for one year. Therefore, the sequence of work performed must be followed.

Primer walls before putty - albeitimperceptible at first glance process, but very important. Failing to do it, you risk regretting your savings in a month. In addition, the primer of the walls before putty will help save on the replacement of facing materials.

Purpose of the primer

The best way to keep on the walls for a long timeand ceiling decoration materials - this is to use special primers to increase adhesion. If the surface is not primed before the putty, the plaster or tile adhesive applied to it will eventually flake off. Also, some types of primers are antiseptic and prevent the occurrence of mold.

To prevent trouble (cracks,falling out of layers of putty and sagging of wallpaper), which often occur after filling of untreated surfaces, will help primer the walls before putty. Photos will help to understand the features of primers and the nuances of their application.

How to choose a primer for walls

The primer of the walls before putty starts withchoosing the right mixture. First of all, you should pay attention to the degree of porosity of the surface. Brick, concrete and other materials have a different percentage of moisture absorption. This factor affects the strength of adhesion of finishing materials to the wall surface.

Suitable for dense, low-porous substrates.primer with high adhesive properties. If the surface is friable, very porous, it is better to use a primer with a deep degree of penetration. Universal tools are used for the basics of medium porosity.

Most primers are designed for a specific type of base (manufacturers indicate them on the package) for maximum effect.

Descriptions of types of primers

Primer can be many types, with different properties and for different surfaces.

Acrylic primer (universal) - suitablefor most surfaces. Drying time is directly dependent on the humidity of the room, does not exceed 4 hours. Acrylic solution is best suited for priming walls before puttying.

Alkyd - used only for wooden surfaces. It is forbidden to use with putty.

Glyphthalic primer - intended for wood and metals. Highly toxic, it is recommended to work only in ventilated rooms in respirators.

Perchlorvinyl solution is most suitable for use on brick and concrete surfaces after filling. Designed for outdoor use only.

Phenolic primer, as well as glyptal, is used on wooden and metal surfaces, where the depth of absorption is not important. It is not recommended to use before putty walls.

Polystyrene - is used for wood and priming plastered, plastered surfaces. It has a very toxic composition.

Polyvinyl acetate - for priming surfaces for painting with polyvinyl acetate paint. The complete drying time of the primer is about 40 minutes.

Price categories

The price / quality ratio of the primer can be divided into four main groups:

• The cheapest. Used when price is the predominant factor, and quality is not particularly important. This applies to low-budget construction projects, finishing non-residential public buildings.
• Average price. Domestic manufacturers of primers based on imported components.
• The price is above average. Putty and primer from well-known foreign manufacturers (widely represented in Russia).
• High price. Elite foreign manufacturers using additional special additives. Such material is manufactured and sold under the order. The price may be more than the cost of mixtures of the third group at least several times.

  Quality in most cases is directly related toprimer price. But there are exceptions. There are options for a good primer at a reasonable price, they are enough to produce high-quality primer walls before putty. Knauf is a line of primers that perfectly strengthen the base and dry quickly. In addition, it is absolutely non-toxic - made of environmentally friendly components.

Preparation for the priming process

Preparing for priming is no less important than the process of applying the mixture.

Before starting work you need to take care ofthe acquisition of all the necessary tools and materials. The tool for applying can be a roller, brush or spray. Also, when using a roller, a special capacity is needed for ease of operation. The amount of primer is calculated based on the total area on which the walls will be primed before puttying. Consumption - about one liter of 3-5 square meters. m (depending on the type of primer).

After that we lay down the floor covering (ifwe do partial repair). Suitable polyethylene film. Next, prepare the walls, remove the possible fasteners, fill up the potholes and cracks. Priming the walls before putty for wallpaper requires careful removal of residual old wallpaper to prevent peeling of putty.

Description of the work process

Cleaned prepared walls carefullyprocess with a wet sponge to remove dust. Then we pour a primer into the prepared container and apply it on the wall. It is more convenient to apply the material to the wall with a roller than with a brush: the primer mixture lays down evenly, and the work progresses faster.

Roller movements are performed first from top to bottom, then from left to right. Hard-to-reach places that the roller lacks are brushed with a brush.

After completion of work, wait for the layer to dry.primer. Depending on its type, type of walls and humidity, this process can last from 3 to 15 hours. After complete drying of the wall, you can proceed to the putty.