In 2017, a major fire occurred in London in a 24-floor tower, resulting in 80 fatalities.

Cause: the flames spread via the ventilated cavity, creating a chimney effect behind the external cladding—invisible and inaccessible to firefighters. 

Since then, several solutions have been introduced to the market, based on intumescent* foam (*which expands when exposed to heat), sealing the air cavity at the level of the fire.

However, this solution has several drawbacks, including sensitivity to moisture and the long-term retention of its physical properties after a few years.

A ventilated façade consists of insulation boards fixed to the concrete wall (supporting substrate), and an external cladding system separated by an air cavity of a few cm, allowing the insulation to “breathe” and thereby prevent moisture build-up and mould growth.

DELTA CONCEPT is currently marketing its new product: SnapTemp® Pyro — a fire barrier consisting of a perforated stainless-steel sheet with rectangular openings, fitted with snap bimetals designed to seal these openings at 120°C in the event of a fire.

To protect the entire building, SnapTemp® Pyro  units are installed along the full perimeter of the façade, at every floor level, positioned between the insulation layer and the exterior cladding, within the ventilated cavity.

Fire tests were carried out in early 2025 at the European Fire Testing and Certification Center in Vienna, Austria. They were successfully completed and are expected to lead to European certification in the coming months.

You can find the product datasheet at this link.

You can find the user guide at this link.