Fire protection for cable penetrations — compliant installation. Cable trays are the most common fire protection defect in buildings. We seal wall and ceiling penetrations to standard — from initial sealing in new build to retrofit in existing stock.
A cable seal is the fire- and smoke-tight closure of a cable penetration through a fire wall or ceiling. Its task: keep fire and smoke in the affected fire compartment. The fire resistance must match that of the surrounding wall — i.e. S90 in an F90 wall. A non-existent or improperly installed seal can carry a fire into the next fire compartment within minutes — through direct flame passage or smoke gases. Cable seals are mandatory and are governed by MLAR and LAR NRW.
The class must match the fire resistance of the surrounding wall. Standard in F90 walls is S90; special cases up to S120.
Rare — only in F30 walls, e.g. partitions between use units of low fire load.
In F60 walls, e.g. between protected areas with elevated fire load.
Standard in F90 fire walls — the most common application in industry and commerce.
Special cases in particular protection areas — high-rise cores, transformer rooms, server enclosures.
Each system has its strengths. We advise manufacturer-independently per use case, occupancy density and future re-occupation.
Mineral wool with fire-protective coating. Flexible, easy to re-occupy, ideal for many cables and changing occupancy.
Fire-protective mortar. Robust and mechanically resilient, but not re-occupiable without chiselling.
Fire-protective cushions. Temporary or for very frequently changing occupancy — e.g. in data centres during the build phase.
Roxtec, Hauff, CFS-BL. For high occupancy, gas and water tightness, industrial standard.
For individual pipe or cable penetrations — compact, quick to install.
For trays that cannot be classically sealed — combined with fire-protective cladding.
Full spectrum — coordinated with electricians and other trades.
Including planning, material, installation and documentation — scheduled with the construction programme.
Compliant retrofit of open or defective penetrations — see retrofit detail page.
Additional cables through existing seals — only with approved systems, with updated labelling.
Complete defects lists from fire inspection or expert report in one engagement.
Declaration of conformity, photo record, as-built plan, seal numbering — digital.
Optional: annual visual inspection of all seals with report for authorities and insurers.
Most common — through fire walls in concrete, masonry or drywall. See the wall detail page.
Stricter due to chimney effect — vertical fire spread must be reliably prevented.
Special solutions for raised floors in data centres and offices — often with enclosure.
Service shafts between storeys — strict requirements due to vertical shaft draught.
High-volume trays with high occupancy — usually modular systems or soft seal.
Highly sensitive — strict documentation for experts and authorities.
Current training records for Hilti, Promat, Würth, Rockwool, Roxtec and Hauff.
We choose the right system for the situation — not the most heavily marketed.
Digital, photographic, with as-built plan and seal numbering.
Coordination with electrical, drywall and others — on schedule and without rework.
Detail page for wall penetrations, wall types and occupancy.
Detail page for ceiling penetrations and chimney-effect protection.
Process defects lists from fire inspection or expert report in one engagement.
Overview of all sealing types.
Complementary for large trays.
Annual inspection and documentation.
For all wall types and occupancy densities. Cable seals in walls are the most common form of penetration seal. Depending on wall type (concrete, masonry, drywall) and occupancy, different systems are used — we plan, supply and install.
02cProtection against vertical fire spread. Ceiling penetrations are particularly critical from a fire protection perspective: through the chimney effect a fire spreads vertically faster than horizontally. Higher requirements therefore apply — in execution, documentation and inspection.
02dReliable remediation of fire protection defects — even during live operations. Open or defective cable penetrations are the most common fire protection defect in existing buildings. We retrofit: systematically, compliant, documented.
We survey your stock — free of charge and without obligation. You then receive a binding quote with prioritisation.