During the construction of prefabricated objects, it is the fasteners that determine how reliable and durable the entire system of enclosing structures becomes. An incorrectly selected self-tapping screw or an installation error can negate the advantages that a modern sandwichhas. Therefore, the choice of fixing elements and compliance with technology come to the fore. High-quality fastening directly affects the thermal insulation, load resistance and appearance of the building, especially when using a sandwich panel for industrial purposes.

How to choose self-tapping screws for mounting sandwich panels

The choice of fasteners begins with an understanding of the operating conditions and the type of base. Self-tapping screws for sandwich panels are selected taking into account the thickness of the lining, the nature of the supporting structure and the expected loads. The base is most often a metal frame, but there are options where concrete or a combined material is used. In any case, the fasteners must ensure a strong connection without deformation of the coating and damage to the protective layer.

The selection process takes into account key parameters that determine the correct installation of sandwich panels, components, and overall structural reliability:

• Длина Self-tapping screw length: it is calculated in such a way as to ensure a secure attachment to the metal frame, passing through the lining and insulation with the necessary margin.
• Diameter: This indicator affects the load-bearing capacity, as well as what hole is formed during drilling.
• Tip type: The brown tip or integrated drill bit allows you to work without prior preparation, especially when fixed in steel.
• Protective coating: fasteners must be resistant to corrosion, so it is customary to galvanize them for use in aggressive environments.

When installing, it is important to follow the rules for installing sandwich panels, since even high-quality fasteners do not compensate for technological errors. The self-tapping screw is inserted strictly perpendicular, without distortions, so that the epdm sealing washer fits snugly to the surface. The optimal step between fixing points is calculated by the project and should not be changed on the spot. Otherwise, the system loses the uniformity of load distribution and can become a source of deformations over time.

Sealing tapes and cords

In addition to mechanical fixation, protection from moisture and air is of great importance. Sealing joints prevents heat loss and extends the service life of the structure. For this purpose, special sealing elements are used to compensate for unevenness and vibrations that occur during operation.

In practice, the following solutions are used to seal holes and joints:

• Tapes and cords: elastic padding is placed at the junction of panels and shaped elements, reducing the risk of blowing.
• Sealing washer EPDM sealing washer: It forms a sealed ring around the fastener point and protects the metal from contact with moisture.
• Additional elements: in complex nodes, sealing is applied taking into account the passage of engineering communications, such as cable.

For proper installation, it is important to use the appropriate tool and control the tightening force. Excessive pressure can damage the coating, and insufficient pressure can break the seal. You should also take into account the length of the fastener and the matching of the base, whether it is metal or another supporting system. Only a comprehensive approach to selection and installation provides a reliable result, in which the panel retains its properties throughout its entire service life.