Fungi for fixing the insulation: types and technology of installation

Fungi for fixing the insulation are common in the use of façade fasteners, they are used to install thermal insulation to the inner and outer surfaces of walls of small and multi-storey buildings. Before choosing such consumables it is necessary to familiarize yourself with their varieties, as well as technological features.

Classification of products

In order to meet the needs of the modern construction industry, today three varieties of fungi for the installation of insulation are manufactured. Among them - fasteners with a polymer nail, metal, as well as a metal nail with a thermal head.

Plastic dowels, for example, are made of polyamide, nylon or polypropylene. The main advantage of these products is low price, but their strength leaves much to be desired.

Characteristics of plastic dowels

Plastic fungi for fixing the insulation are intended for installation of thermal insulation on the surface of brick or concrete, but they can not be used to work with heavy insulation on hollow walls or surfaces made of foam concrete. Today the cost of one such fastener for thermal insulation with a polymer nail is approximately two rubles per piece.

Features of metal fungi

Metal dowels are stronger than polymeric analogues, but their use is limited by the rather impressive thermal conductivity of the metal, which can worsen the efficiency of thermal insulation. Metal fungi for fixing the insulation are able to form cold bridges, which are zones with a fairly high thermal conductivity. The dowel with a metal nail can be corroded during operation, and if the installation was conducted on plaster facades, the surface may become covered with yellow rust stains. Pay for one such dowel with a metal nail will have about 4 rubles.

Characteristics of fungi with a thermal head

Fungi for fixing the insulation, which have a thermal head, are common as an alternative to metal dowels. They are based on a steel nail, but the cap is covered with a metal with a low thermal conductivity. The role of the coating is impact-resistant polyamide, whose thermal conductivity is equal to 0.027 W / μ, this parameter can be compared with the similar quality of a large number of popular heaters. Among other things, the metal nail is in a so-called polymer cover, which is why the dowel is not exposed to moisture and corrosion. However, it is necessary to pay for all these qualities more, the price of a product with a thermal head can vary from 4 to 6 rubles. For one piece, the final cost will depend on the manufacturer.

Determining the length of fasteners

When fixing the insulation to the wall with fungi, it is important at the first stage to calculate the required length of consumables. In doing so, you should follow the rule, which provides for the use of the formula: D = T + K + I + Z. In it, the value of T is the thickness of the applied thermal insulation, whereas K is the thickness of the adhesive layer used to strengthen the insulation panels. The length at which the dowel will go deeper into the wall is denoted by the letter I, this value can not be less than 4.5 cm. Finally, Z is the value that is used when the wall deviates from the vertical. Use it if necessary.

Determination of quantity

If you use fungi to fix the insulation, the consumption per square meter should be determined by you. To do this, use building codes and rules. To fix the thermal insulation on the inner walls or facades of one-story buildings per square meter of insulation, you must use four fasteners, each of which is located in the corner. In this case, you need to add one in the center of the panel. If we are talking about the corners of the building, then it will take 6 fungi, which are installed parallel to each other. To install a heater on facades, the height of which starts from 8 and ends at 20 meters, it will take 7 pieces per square meter. If you want to work with the facade of a multi-storey building, whose height is more than 20 m, then per square meter of thermal insulation will need to spend 9 fungi.

Length and cost

If you needed fungi to fix the insulation, you can buy this supplies in St. Petersburg at different costs. For example, if we are talking about a dowel, whose dimensions are 10x100 mm, and the nail has a polypropylene coating, then for one unit of goods it is necessary to pay 2.39 rubles. If the length increases to 160 mm, the dowel for thermal insulation will cost 5.68 rubles, while it will have a metal nail. Fasteners with nylon nails of 120 mm length will cost 3.86 rubles. Fungi for fixing the heater, the length of which is 120 mm, cost 6.27 rubles. In this case there is a metal nail and a thermal head.

If you are interested in a variety of fungus, which has a metal nail and thermal head, the length of the fastener can be equal to 160 mm, the price in this case increases to 7.74 rubles. With the same length, but with a polypropylene nail, the price will be 2.94 rubles. Buy fungi to fix the insulation in Moscow can be at the same cost, if the length will be increased to 200 mm, and the nail will be metal, then for 1 unit will need to pay 7.79 rubles. If necessary, you can find a metal nail, which looks like a dowel with a length of 220 mm, while the price is 9.82 rubles. Such fungi for fixing the heater "Technonikol" are also suitable, you can use them also at a length of 140 mm. If the nail is covered with polypropylene protection, then you will have to pay 2.67 rubles for the dowel.

Mounting technology

Whichever heater you use, whether it is foam, styrofoam or penoplex, the technology of mounting the material with dowels will be identical. First, the thermal insulation is prepared, then the panels are installed on the adhesive solution, and the next step is fixation with dowels. Do not forget about the need for processing joints, as well as installing an insulation film. At the final stage of the thermal insulation is covered with a finishing material or plastered. Before installing the insulation, the surface is important to prepare, remove plaster and repair irregularities and cracks. In order to increase the adhesion qualities of the adhesive, the base of the walls is degreased. Panels of expanded polystyrene, expanded polystyrene or penoplex are shrunk onto a glue composition that should not contain toluene or acetone, as well as other organic solvents. In order to exclude the shear of the thermal insulation under its own weight, a metallic profile must be laid under the first row of plates. Once the solution has dried, additional fixation with fungi can be made. To install them you need holes, for which you should use a drill with a diameter equal to the diameter of the fastener foot. While the length of the hole must be greater than the length of the dowel per centimeter, this will eliminate the unreliable fixation if dust is collected inside the hole.

Additional recommendations

Fungi should be located on the joints of panels, as this will not cause an increase in the holes in the thermal insulation, which can negatively affect the efficiency of the insulation layer. If the fungus needs to be installed in a metal coating, then the self-tapping screw should be fixed to its foot, then with it the fastener is pressed into the thermal insulation so that the screw reaches the insulating surface. After using a screwdriver, the dowel is screwed into the metal, and the depth of the hole for the screw should be about 15 mm. After the installation of the thermal insulation, the joints formed between the insulation panels must be glued with reinforcing aluminum tape.