Fire protection & smoke extraction |2026-09-07

Simple wet installation in metal stud walls using mortar

NEW: Extended application scope for installation options, enabling more flexible assembly

Wildeboer is expanding the range of applications for the FK90K fire damper in metal stud walls: in addition to the existing dry installation method, wet installation using mortar is now also possible. This new installation option offers greater flexibility in planning and fitting.

New installation option for the FK90K in metal stud walls using mortar

Until now, the FK90K could only be installed in metal stud walls using the dry installation method. With this extension to the range of applications, a further installation option has been added: the fire damper can now also be installed in metal stud walls using the wet installation method with mortar. This additional option makes it possible to seal larger gaps with mortar.

Consequently, both dry and wet installation methods are now available for fitting the FK90K into metal stud walls.

Detailed information on the respective installation scenarios and on correct installation can be found in the current user manual for the FK90K fire damper.

FK90K in metal-framed walls with mortar

Compact fire damper for confined installation spaces

The FK90K is characterised by its very short overall length and is particularly suitable for confined installation spaces. Despite its compact design, it features a large free cross-section. This enables high volume flow rates with low pressure losses and correspondingly low sound power levels.

Advantages of the FK90K at a glance:

  • Maintenance-free design
  • Very short overall length and minimal installation clearances for confined installation spaces
  • Large clear cross-section
  • High air flow rates with low pressure losses
  • Compatibility with building control systems such as Wildeboer-Net
  • extensive range of tested installation scenarios

 

The FK90K is maintenance-free by design and, with its calcium silicate damper blade and other galvanised or, optionally, epoxy-coated steel components, is corrosion-resistant.

The range of installation options for the FK90K is complemented by the variant for wet installation in metal stud walls. 

All technical specifications, design options and installation instructions for the fire damper can be found on the FK90K product page and in the user manual.

User manual FK90K fire damper (2025-12)
PDF 20MB
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FR90 fire damper in short lengths
Environmental Product Declaration (EPD)
Hygiene certificate
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FK90K Fire damper (series FK92K)
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