PWS2-MW-ST-150 - Wall sandwich panel - mineral wool - visible fastening

NOTE – Group III – dark colors

Given that dark colors in Group III are subject to significantly higher thermal loads than very light and light colors in Groups I and II, special care must be taken during the design process to ensure that the following conditions are met:

• The fastening method and static configuration must comply with the permissible load tables and spans (criteria met—ultimate limit state, serviceability limit state)*
• Limit the maximum length of the panels according to the manufacturer’s recommendations**
• Take the assembly temperature into account***

* For dark-colored panels, single-span configurations are recommended; otherwise, deformations in the panel’s exterior cladding may occur at intermediate supports, which are not acceptable to the Investor. The corrugations in question meet the requirements of the PN EN 14509 standard in terms of permissible deviations; however, they may be grounds for a complaint.

** The maximum panel lengths should comply with the manufacturer’s guidelines, depending on the type of panel and its application (roof/wall)—see PANEL LENGTHS.

*** Assembly of dark-colored panels can be performed at temperatures ranging from^10°Cto^35°C. This condition must be strictly observed. Assembly at temperatures below^10°C(or above^35°C) may lead to deformation and permanent damage to the panel during the building’s service life (and, in extreme cases, even during assembly). In this case, panel deformation and damage are caused by the high elongation of the cladding (e.g., at summer temperatures) relative to its initial length (the length of the cladding at the time of assembly).

Assembly of light- and very light-colored panels can be performed at temperatures ranging from^+5°Cto^+35°C.

Failure to follow the above guidelines may result in surface deformation of the panels and localized loss of stability, for which the manufacturer assumes no liability. For colors not listed in the table, please contact a Pruszyński Company technical advisor. The color of the panel may be changed only with the designer’s approval.

• If you are picking up the goods with your own vehicle, the vehicle should have an open loading platform that allows for easy loading and unloading.
• “Manual” unloading should be performed by an adequate number of people; that is, for long sheets (approx. 6 meters), 6 people should be involved, 3 on each side, taking special care not to slide the sheets over one another, not to bend the side edges, and not to stretch them. Deformation of the sheets during unloading and handling causes subsequent problems with their proper assembly (gaps at the seams).
• The most appropriate method is to unload the goods in the manufacturer’s packaging using mechanical equipment.
• At the construction site, the sheets should be stored in their original packaging, under a roof. Storage under these conditions should not exceed 3 weeks from the date of manufacture. After this time, the packaging should be opened, and the sheets should be separated with spacers to allow for free air circulation. The maximum storage period should not exceed 6 months from the date of manufacture, under penalty of voiding the Warranty.
• Protective films are used to provide additional protection for coated sheet metal against mechanical damage, stress, and impacts that may occur during transportation, handling, or forming. Protective films never exempt the user from the obligation to properly secure the sheets during storage or to protect them from the harmful effects of chemicals during processing. It is recommended to gradually remove the protective film from the finished profiles, one piece at a time, before installing the wall and roof components on the building. The protective film should be removed from the sheet metal surface within three weeks of the sheet’s date of manufacture, provided the product is stored properly—that is, at a positive temperature, away from high humidity, and out of direct sunlight. Failure to maintain proper storage conditions may shorten the timeframe for removing the film to three days from the date of delivery.
• Improper storage can make it difficult to remove the protective film and leave adhesive residue on the sheets.

• To extend the service life of roofs and facades made of coated sheet metal, they should be inspected and maintained regularly.
• Inspection – Once a year (preferably in the spring), you should inspect the roof and exterior walls to detect any damage early on.
• Cleaning Metal Sheets – Roofs and facades made of coated metal sheets require cleaning at least once a year. Dirt that accumulates on the sheet metal can cause uneven discoloration (due to uneven exposure to UV rays) and reduce corrosion resistance (dirt traps moisture on the metal, gradually damaging it). Dirty and stained areas can be cleaned with a soft brush and water (max. 60°C). If necessary, a mild detergent may be added to the water (pH 6–7, max. 10% solution). Pressurized water (max. 100 bar) may also be used for cleaning; however, the water jet must not be directed too close to the sheet’s surface (min. 30 cm) nor perpendicular to the surface. At the joints, the water jet should be directed downward to prevent pressurized water from entering the gaps around the joints. Old coatings must be handled with extreme care. Cleaning should be performed from top to bottom, and the cleaned area must always be thoroughly rinsed with clean water immediately afterward.
• Do not use scouring powders, nitro solvents, chlorine-based solutions, aromatic cleaners, or products containing ammonium chloride (salmiak) or sodium salts.
• Damage — Any repairs to damage that may occur during the Warranty period should be discussed with the roof/facade contractor and may be performed only with the contractor’s approval. Repairs to small areas are performed using air-drying touch-up paints. Painting large areas is generally possible only with special industrial paints designed for the renovation of coatings. The area to be painted should be limited only to those spots that require it (scratches down to the metal layer, corrosion spots, etc.). Surface preparation for painting should be performed in accordance with generally accepted principles. Always thoroughly remove all traces of corrosion—preferably using special brushes or fine-grit sandpaper. Next, the surface to be repaired must be thoroughly dusted, degreased, and cleaned. To degrease the surface, you can use extraction gasoline or water with added surfactants (preferably with a 1–2% ammonia solution). The repaired areas may show color differences compared to the original sheet metal colors due to natural atmospheric effects (aging of the paint under the influence of UV radiation).
• Organically coated steel sheets must not be used in:
  • an environment in constant contact with highly saline water,
  • contact with construction chemicals, including concrete, plaster, wet wood, etc.,
  • in an environment exposed to harsh chemicals
  • in combination with materials having a different electrochemical potential
• CAUTION—Health and safety rules must be strictly observed during inspection, cleaning, maintenance, and repairs.
• Pruszyński Company is not liable for any accidents that may occur as a result of performing the above activities.