wall upgrading works.

the FIREGUARD® S boards are made of cement-matrix silicates, asbestos-free, produced in autoclave. They guarantee high thermal insulation and integrity in the event of fire, making them suitable in all cases where passive fire protection is required. They are non-combustible (reaction to fire class A1). FIREGUARD® S boards guarantee mechanical strength and high resistance to humidity.
the FIREGUARD® S boards are fixed by means of mechanical fixings (anchors). The instructions contained in the specific certifications must be observed, in relation to the types adopted. In cladding systems, FIREGUARD® S boards are usually certified without joint filling. If, for reasons of aesthetic finish, joint filling is required, the fixings must be positioned at 250 mm centres, along the edges of the board and along its centre line. FIREGUARD COMPOUND gypsum-based filler must be used, applied with mesh tape or glass fibre tape.
The contents of this page are summarised from the official technical data sheet PDF, which remains the reference document.