Is the recess (dent) in the area of the screw connection permissible with visibly screwed FischerTHERM?
When fastening FischerTHERM wall panels, it is simply unavoidable that indentations occur in the approx. 0.5mm thick outer shell around the screw area. Otherwise, there is a risk that the wall panels are not sufficiently tightened to the substructure and may rattle on a windy day... Read more
What is to be considered with the execution of horizontal corrugated profiles on inner horizontally lying cassette profiles?
Answer: All building authority approvals for liner tray profiles regulate the conventional design of a double-skin construction, whereby the outer skin consists of trapezoidal profiles that are directly connected to the narrow liner tray top flanges. In recent years, designers have been demanding horizontally or diagonally arranged corrugated profiles. In these cases, an additional spacer construction is arranged between horizontal liner tray profiles and horizontal corrugated profiles ..... Read more
How to replace defective FischerTHERM plus panels?
Answer: The replacement of concealed wall panels is quite complex, but there are two common options. 1. the wall surface is dismantled in the opposite direction to the mounting direction up to the damaged panel. The damaged panel is replaced and all other dismantled panels are reinstalled. 2. the damaged panel and an adjacent panel are carefully dismantled with destructive effect. The screws must be ground off ..... Read more
What is the origin of cracking noises in steel cladding on wooden substructures?
Answer: Cracking noises are mainly caused by sunlight or cooling of light roof or wall elements made of metal, whereby these elements themselves do not produce any noise. Due to the relatively low local strength, absolutely 'solid' connections are difficult to achieve in wooden substructures, e.g. between trusses and the suspended purlins or connections between supports and wall transoms. In this respect, slight displacements in these connection areas are to be expected with corresponding changes in length and thus stresses, e.g. due to thermal stress caused by solar radiation on the fixed cladding components. If such displacements .... Read more
What corrosion protection is suitable for steel roof coverings?
Außer bei Dächern für „untergeordnete Zwecke“ ist gemäß DIN 18807-1, Stahltrapezprofile, für bewitterte Dachaußenflächen die höchste Korrosionsschutzklasse III gemäß DIN 55928-8 erforderlich. Das bedeutet, dass grundsätzlich alle mindestens 25 µm dicken Bandbeschichtungen dieser Normforderung entsprechen. Jahrzehntelange Erfahrungen zeigen aber, dass 25 µm dicke (das sind nur 2,5 hundertstel mm !) Bandbeschichtungen, egal ob aus Polyester …. Read more
Which metals can be assembled together?
Answer: Coated profiled sheets can be installed together with all other metals without separating layers. Uncoated profiled sheets must be permanently separated by subsequent coatings or intermediate layers on the contact surfaces if adverse effects from contact with different metals can occur.... Read more
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