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Passive fire protection using spray-on flocking: the Projiso solution

Discover our solution for passive fire protection of buildings: spray-on fibrous and slurry coatings that resist fire and limit the risks of propagation.

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The importance of passive fire protection

Passive fire protection plays a preventive role. Passive fire protection consists in a set of design measures that help safeguard a building's mechanical stability and limit the spread of fire for a given time. This period is fixed by current regulations according to building type. Passive fire protection is, therefore, a key factor in building construction or retrofitting.

The passive fire protection of buildings complements the installation of active fire protection systems (sprinklers, extinguishers, etc.) which is necessary but insufficient.

Building fire protection safety standards

As a professional, you are required to comply with building safety standards.
The purpose of the safety regulation is to:

Prevent the origin, development and spread of fires
Limit the spread of fire
Ensure the fire stability of structural elements in the event of fire
Prevent the fire from spreading to neighbouring buildings
Ensure the safety of occupants and their evacuation
Facilitate intervention by the fire brigade
Reduce operating losses

The primary objective is to evacuate building occupants under the best possible conditions. Some disasters can cause irreversible damage to a building, leading to a full operational shut-down. Passive fire protection safeguards the building by its very presence, with no need for human intervention or a power supply, or maintenance.

Reaction to fire is a measure of a material's intrinsic properties. It assesses all the properties of a given material in relation to how it impacts on the origin and propagation of a fire.
Like acoustic and thermal insulation, fire resistance is a key parameter that needs to be considered at a building’s design stage.
Fire protection can be applied to concrete slabs, wood floors, composite floor decking, roofing pans, metal structures, building ventilation ducts.
Spray-on mineral wool insulation also provides a passive fire protection solution. The spraying or flocking technique consists in pressurised application of mineral wool fibres combined with a binder, to obtain, depending on the thickness applied, the fire resistance rating that meets the ERP fire safety standard.

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Building regulations and fire classification

Our fire-resistant spray-on coatings

Projiso manufactures and markets fire-resistant coatings (all classified A1).
For example, a 44-mm thick layer of our thermal insulation Fibrexpan^® will provide up to 2 hours fire protection on a concrete slab.

For substrates involving concrete, wood floors, steel structures, roof pans, structural floor trays, sheet metal ducts, double-skin cladding, Projiso manufactures and markets Fibrofeu^®, Firespray^® or Fireplaster^® 270 for fire flocking. .

These spray-on fibrous and slurry coatings are all CE-marked and have an A1 fire rating. They are composed of a mixture of hydraulic and inorganic binders.
They are rot-proof, non-combustible, non-toxic and easy to work with.