The installation of the sandwich panel is a decisive factor to guarantee its correct operation. Although it is a fast and efficient construction system, poor execution can cause leaks, loss of thermal insulation and reduction of the panel’s useful life. In this article we analyze the most common mistakes when installing sandwich panels and how to avoid them in order to achieve a professional and durable result.
The problem: improper sandwich panel installation
One of the most common failures in sandwich panel roofs and enclosures is not in the material, but in the way it is installed. When the technical recommendations are not followed, problems can appear such as:
- Water ingress due to rain or condensation.
- Thermal bridges that reduce insulation.
- Movements of the panel due to poorly resolved dilatations.
- Premature deterioration of the structure.
These problems affect both roof and facade sandwich panels.
Mistake 1: Inadequate fixation
Incorrect fastening of the sandwich panel is one of the most frequent errors. Using non-specific fasteners, an insufficient number of fasteners or placing them out of the proper groove can compromise strength and watertightness.
Best practices:
- Use approved screws for sandwich panels.
- Respect the distance between fixings.
- Always place the fastening in the correct structural point.
Error 2: poorly executed overlaps
Sandwich panel overlaps, especially on roofs, are critical to prevent leaks. An insufficient or misaligned overlap facilitates the entry of water and wind.
Key recommendations:
- Respect the minimum overlap indicated by the manufacturer.
- Correctly align the panels before fastening them.
- Check the direction of installation according to the slope of the roof.
Pitfall 3: lack of technical sealing in joints
Failure to apply technical sealing at joints is a serious mistake that drastically reduces the performance of the system. Without proper sealing, leaks, condensation and insulation losses occur.
Professional solution:
- Apply specific sealants for sandwich panels.
- Sealing of joints, ends and singular points.
- Do not replace technical sealing with improvised solutions.
Additional tips for proper installation
✔ Always read the manufacturer’s technical instructions.
Use compatible accessories (trim, flashings, hardware).
✔ Check the flatness of the structure before assembly.
✔ Rely on technical advice if doubts arise.
Incorrect installation of the sandwich panel can lead to leaks or loss of insulation, even when using a good material. The most common errors are inadequate fastening, poorly executed overlaps and the absence of technical sealing in joints. Avoiding them is essential to ensure an efficient, durable and trouble-free system in the long term.
If you want to guarantee an optimal result, the key is to install well from the first panel.