Firestops are an integral part of the passive fire protection of buildings. The transit seals of installations penetrating through fire separating structures must treated against the spread of fire be in accordance with the Decree of the Ministry of the Interior of the Czech Republic No. 246/2001 and subsequent amendments or additions according to ČSN 730810. The same applies to the construction joints between which expansion and construction joints are formed.

A firestop is a material or a combination of materials with a certain fire resistance


(up to 180 minutes) which, thanks to its properties and composition, resists fire for the required period of time. The firestop prevents the spread of fire in a wall or ceiling. This ensures that the limit values are not exceeded and that the integrity of the structure and the insulation capacity on the heated side etc. are not compromised.

Firestops can be used for:

  • expansion and construction joints of building structures,
  • cable route transit seals,
  • air duct transit seals,
  • pipe transit seals:
    • flammable
      • insulated,
      • non-insulated,
    • non-flammable
      • insulated,
      • non-insulated.

What does a firestop look like?

Firestops come in many shapes and sizes They can be immediately identified by their label, which is an integral part of each firestop. The identification label contains information about the year of installation, the material used, the fire resistance and the details of the installing company.

What are the most common colours, designs and area of occurrence of firestops?

A variety of metal sleeves, fire tapes, foams, sealants and intumescent coatings in a variety of colours are used for firestops Primarily red, white, black and grey. The materials are complemented by mineral fibre boards.

Firestops are found in ceilings, technical rooms (boiler rooms, substations) and installation shafts.

We use materials from the following manufacturers: Hilti, Dunamenti, Knauf…