Sandwich panels element-wise assembly are three-layer building structures, which are characterized by a rather large size. They are based on a core of insulation material.
general description
Sandwich panels of element-wise assembly, the metal profiles of which are based, can have different thermal insulation. It is selected from the most effective materials, such as non-combustible plates based on basalt mineral wool, as well as self-extinguishing polystyrene foam. In the first case, the fibers are oriented perpendicularly, and the density of the structure can vary from 110 to 120 kilograms per cubic meter. In the second case, the density is from 15.1 to 25 kilograms per cubic meter. The described layer may have a different thickness, which is selected depending on the climatic conditions of the area where it is supposed to build and operate the house.
Materials used
The core may have roofing sandwich panels made of mineral wool with a basalt fiber base. On both sides, the material is protected by a galvanized steel lining, which has a protective coating. It consists of a polymer composition, a primer and an anti-corrosion mixture. In addition, cladding profiles guarantee extra rigidity. Sandwich panels are assembled using a high-quality polyurethane one-component adhesive composition. The panels are fixed to each other during installation, while grips for roofing panels are used. Such slabs should be used for roofs with a minimum slope of 5 degrees, as for solid structures; and 7 degrees, when there is a need to connect the plates together in length.
Roof Panel Specifications
Sandwich panels of element-wise assembly, installation instructions of which will be presented below, may have different thicknesses, lengths, and widths. The standard ratio of panel dimensions for all manufacturers, as a rule, is the same. Thus, the thickness can vary from 6 to 20 centimeters, the length is from 50 to 140, and the width is 1 meter. The only difference is that the mineral wool boards have a thickness that starts from 80 millimeters. Whereas the greatest length is 150 millimeters.
When considering wall-mounted sandwich panels of element-wise assemblies, you should pay attention to their characteristics, among them thermal conductivity, which depends on the thickness. These values for expanded polystyrene and mineral wool differ slightly. If the first of the mentioned materials has a thickness within 100 millimeters, then the density is 0.375 k * W / (m2 · K) a, while with the same thickness of mineral wool its density indicator will be 0.418.
Roof sandwich panels of element - wise assembly are characterized by high water resistance, which is guaranteed by the excellent water-repellent properties of mineral wool. Materials in the composition are not characterized by the effect of capillary absorption of moisture. From the penetration of water and air, the inner layer of the products is protected by sealing sealing materials, which are located in the castle joints along the longitudinal joints. Noise absorption, which is provided by two factors, is among the main advantages of structures for arranging the roof, among them the reflection of sound waves from the surface, as well as the conversion of a sound wave into thermal energy. Builders note a low mass that can be compared with the weight inherent in traditional building materials. This makes roofing sandwich panels convenient for transportation, storage and installation.
Characteristics of bearing capacity and fire resistance
Roof sandwich panels element - wise assembly have a high load-bearing capacity. This is due to the fact that the core is tight enough to the outer profiles, so the loads are distributed evenly. The external layers of metal tensile-compressive forces are perceived quite firmly, while the insulation takes on shear forces. When designing an object of any purpose, an important characteristic is the fire resistance of the roofing system. In the manufacture of sandwich panels, materials that are classified as non-combustible are used.
Wall Panel Features
Wall-mounted sandwich panels of element-wise assembly differ in almost the same characteristics that are characteristic of roofing structures. For example, they have a high level of thermal insulation, excellent noise and sound absorption, as well as low weight. The latter quality allows the construction of buildings without the involvement of lifting equipment. Installation time is reduced, installation of structures can be carried out in any weather conditions, the main thing is that the insulation remains in a dry state. In addition to additional features, maintainability can be distinguished, for this the entire wall does not need to be disassembled. To replace damaged panels, it will be enough to remove the outer lining and replace the failed components with new ones. If we compare with glued sandwich panels, which are delivered to the construction site in a ready-to-use state, then we can distinguish the lower cost of the element-by-element assembly structures.
Production Features
The production of element-wise sandwich panels involves the use of cold rolled hot dip galvanized steel. During manufacture, a protective film is applied to the metal of the sandwich profile, which is designed to protect the surface from damage during loading / unloading and installation work. The basis of the panel is the profile, which is represented by a three-dimensional thin-sheet structure made by cold forming. The last element is made of galvanized steel sheet coated with a polymer. The coating, which is applied to the outer skin, has the qualities of resistance to the effects of the sun, abrasion and the influence of various acids. Products do not corrode during storage and use. Insulation is installed in the sandwich profile, which is fixed by a windproof barrier, and after that - by the outer lining. In its role, as a rule, polymer-coated corrugated board is used.
Varieties of wall products
Sandwich panels of element-wise assembly, the nodes of which will be described in more detail below, are divided into several options. Among the first, one can distinguish South-100 and 150. For these products, a sandwich profile is used, the depth of which is 100 or 150 millimeters. The insulation can have a total thickness of 100 millimeters. As a rule, two layers of thermal insulation are used, each of which has a thickness of 50 millimeters. This eliminates the coincidence of the seams between the layers of plates. To eliminate the occurrence of cold bridges between the profile and the cladding, a heat-separating strip based on Isolon is used, also a strip that is cut from heat-insulating plates.
The second type of wall panels is Center -100 + 30 and 150 + 30. The insulation here is used by analogy with the above option, but on the outside surface Isover insulation boards are additionally fixed, the thickness of which is 30 millimeters. This ensures the expansion of the seams. Variant Sever 100 + 50 and 150 + 50 is made with an inner layer of insulation of 50 millimeters, as well as an outer layer of thermal insulation of 100 millimeters. The outer layer is notched on top and halfway through the thickness is filled with the profile so that 50 millimeters of thermal insulation are located in the cavity of the profile.
Arctic
On sale you can also find the option “Arctic”, the manufacture of which involves the use of insulation with a total thickness of the inner layer of 100 millimeters, the outer layer has a thickness of 150 millimeters. A third of the thickness of the insulation of the outer layer is cut and filled so that 50 millimeters of thermal insulation are located in the cavity of the sandwich profile. In the role of a supporting element for the formation of an additional layer of insulation in the options "North" and "Arctic" are used reinforcement elements.
Installation instructions
If you decide to use prefabricated sandwich panels in the construction of element-wise assembly, you must follow certain installation rules. The technology is not difficult, but provides for the mandatory fulfillment of all requirements. The first sandwich profile should be fixed to the frame at two edges using self-tapping screws. A sealing tape is laid in the joint between the frame and the sandwich profile . The joints between the sandwich panels must be closed with special gaskets or filled with a composition for sealing joints.
The installation instruction for the sandwich panels of the element-wise assembly provides for the next stage of installation in the upper edge of the previous element of the following design. Fixing is done at the same time. After the sealing of the profiles is completed, thermal insulation is installed inside. A vapor barrier membrane is mounted on top of the insulation. At the next stage, the frame, which is also called the reference run, is installed. It should be selected in accordance with the material at the base of the cladding. The gap between the cladding and the vapor barrier should be approximately 20 millimeters. In this case, air will circulate in it, realizing the basic principle of the ventilation facade. At the next stage, the cladding is installed on the frame.
Specialist recommendations
Depending on the type of cladding, certain shaped elements for the panels are used. These are internal and external corners, low tides, fillers, as well as window frames, which can be lateral and upper. This should include, for example, elements of the ridge, etc. It is important to select additional elements for panels in tone or contrasting shades, everything will depend on the wishes of the owner of the house. Shaped additional elements carry not only decorative, but also a protection function. It is important to protect the thermal insulation layer from moisture, since, for example, for mineral wool, water will mean the loss of heat-insulating properties by the material and its gradual destruction.
Recommendations for installing roof sandwich panels
Installation of the sandwich panels of the element-wise assembly on the roof is carried out in the direction from the base to the top. Installation should begin from the corner of the building, and each next tier is laid after the installation of the previous one is completed. In places where the panels adjoin the frame, a thermally dividing strip should be glued.