Modern façade systems are often perceived as a single integrated assembly. However, from an engineering perspective, a façade is a collection of different materials—aluminium, glass, steel, concrete, sealants, gaskets, and stone—each responding differently to environmental conditions. Among all environmental loads acting on a building envelope, temperature variation is one of the most persistent and unavoidable. Every day, façade components expand during heating and contract

In curtain wall engineering, glass breakage is often attributed to poor glass quality or installation defects. However, many failures originate from a less visible issue: the gradual loss of designed edge clearance between the glass and the framing system. The glass-to-frame clearance is intentionally incorporated into façade systems to accommodate various movements that occur throughout a building's life cycle. This gap allows the façade to safely absorb slab deflection, the

What Is Perimeter Fire Safing? Perimeter fire safing is the fire-resistant sealing system installed at the gap between: The concrete floor slab edge And the back of the curtain wall façade system This joint exists around the building perimeter and is necessary to accommodate: Structural movement Slab deflection Thermal expansion Façade tolerances However, if this gap is left untreated or poorly detailed, it becomes a direct pathway for: Smoke migration Hot gas transfer Fire s