How to properly mount the foam plastic to the concrete wall

Modern construction industry is annually enriched with a mass of new materials with unique properties that allow you to build more durable, more durable and cheaper structures.

One of such materials is the penoplex or EPS, used mainly as thermal insulation. At the same time, to ensure high reliability and durability of operation, it is important to correctly carry out the procedure for its installation.

Installation methods and materials used

The installation of polystyrene foam plates can be done without the use of any additional fasteners, however, you should carefully prepare the concrete surface:

• clean;
• plaster;
• to process a primer.

Tip: if the preparation will interfere with the protrusions, for their dismantling, cutting of reinforced concrete with diamond circles is used.

Materials

Before glueing foam concrete to concrete, it is necessary to prepare the following materials:

• cement mortar;
• primers;
• adhesives for polystyrene foam;
• drills for mixing the components of the glue;
• tanks in which components will mix;
• spatulas of gear type.

If the installation is planned with the use of additional fasteners, the set of materials will be even less:

• insulation;
• glue;
• suture sealant;
• dowels.

1. Widely popular is the method of fixing insulation using liquid nails. Its advantage lies in the fact that this substance does not need to be applied to the entire surface of the sheet - it is enough to apply it to the point.

Tip: note that its use is not possible with every type of insulation, moreover, it contains toxic substances. To work with this method, in addition to polystyrene foam and liquid nails, protective gloves are also required.

1. Another option that answers the question - what to stick penoplex to concrete, the use of special foam. However, it is advisable to resort to this method only when working with floors, since the foam has rather low adhesive properties. There are several types of foam:

• for fixing foam blocks;
• for foam sheets;
• for polystyrene plates.

Below will be described in detail about how to glue penoplex to concrete and the characteristics of these materials.

Properties of various types of glue and its uses

1. Bituminous. Key benefits include:

• pronounced waterproofing properties;
• resistance to low temperatures.

It does not require any special pre-treatment, however, if the work is carried out at air temperatures below + 5? C, it is recommended to heat the glue to + 18-20? C.

The instruction is as follows:

1. Clean and prime the concrete surface to be installed.
2. Apply the product on a sheet of polystyrene foam with a thin layer using a solid or notched trowel.
3. To ensure reliable fixation of the plates, they should be pressed for 20 minutes in order for the grip to become more stable.

Among the shortcomings of this material can be identified toxicity and a tendency to ignition under the influence of high temperatures.

1. Bitumen-latex emulsion mastic. It is widely used primarily because of its excellent properties, in particular, the possibility of applying even on a wet base and the absence of the need for heating before use.

It is a composite material of fine bitumen, synthetic rubber and a number of special additives. Due to its resistance to low temperatures and humidity, mastic can also play the role of a waterproofing coating.

1. Silicone glue "Master". It is equally good when used for warming both the inner and outer sides of the walls. It is a viscous liquid based on a special type of rubber that cures in air for about a day. A distinctive feature of this glue is the ability to use in a wide temperature range - from - 60? С to + 300? С.
2. CT 84 polyurethane foam from Ceresit. Excellent material for mounting polystyrene, not having a secondary expansion and therefore does not lead to a divergence of the seams between the sheets.

The foam is applied to the concrete surface with the help of a mounting gun, after which a heater is pressed against this surface. The substance seizes within ten minutes, even under the condition of high humidity and low temperature (up to - 10? С). It must be borne in mind that the foam is toxic and flammable.

Tip: using diamond drilling holes in concrete, you can make the necessary communication channels before insulating the facade.

Features of the preparation and use of dry mixes

The use of cement-polymer mixtures is advisable when attaching insulation to the bases of brick, concrete or drywall. The main components of these mixtures are Portland cement, plasticizer, as well as various additives that enhance their properties.

The most popular in recent years are dry mixes, both universal and specialized, produced by Ceresit. Universal adhesives include CT-85 adhesive, which includes a large number of various polymers that provide high strength and ductility of the mixture.

However, due to the use of expensive additives, the cost of glue turns out to be quite substantial, therefore, for installing insulation on concrete, most often resort to using dry glue CT-83, the price of which is about one and a half times less.

Tip: when preparing an adhesive mixture, it should be borne in mind that its hardening occurs within 2 hours, so it is best to mix the mixture in small portions.

The indisputable advantage of dry cement-polymer mixtures is the possibility of their use even if the base on which polystyrene foam is installed has an uneven surface. Applying glue to the insulation plate should be done in intermittent strips with 2 cm indent from the edge.

In this case, after pressing the plate to the base, air will escape completely unhindered, and air jams will not form.

Tip: if the surface has small irregularities, the mixture can be applied using a notched trowel.

Mix for installation of polystyrene foam plates must be thoroughly mixed with your own hands before applying so that it is as homogeneous as possible, without lumps and water. It is best to mix using a drill with a specially designed nozzle, which will make the process easier and easier.

However, it is necessary to control that the nozzle is completely covered with the mixture and does not trap air, otherwise air bubbles will remain in the solution.

After kneading the mixture is recommended to set aside for 5 hours, then mix again and use immediately. Exposure for a specified time is necessary in order to achieve complete homogeneity of the mixture and the elimination of water from it, interfering with the quality of adhesion.

Conclusion

In this article, you learned how to fix the penoplex to the concrete wall. It was told what materials are used for this, and what are their characteristics. Information was also given on the proper preparation and use of dry mixes. The video in this article will help you find additional information on this topic.