What material is often used to support and secure glass when installing it in curtain walls?

Setting blocks are critical components in the installation of glass within curtain walls. They are specifically designed to provide a stable and level support for the glass, ensuring it is securely positioned and properly aligned within the frame. Made from materials like rubber or neoprene, setting blocks cushion the glass and help manage the weight and stress placed on it, while also accommodating thermal expansion and contraction.

Their use is essential in preventing direct contact between the glass and the rigid frame, which could lead to damage, such as cracking or shattering, due to movement or stress. Thus, incorporating setting blocks not only aids in securing the glass but also enhances the overall durability and performance of the glazing system. This makes them the most suitable choice among the available options for supporting and securing glass in curtain wall applications.