Which method is NOT used for BUR installation?

The method that is not used for Built-Up Roofing (BUR) installation is instantaneous adhesive bonding. BUR systems primarily rely on traditional methods of applying bitumen, either through cold or hot applications, combined with layering materials such as felt.

Cold application of bitumen involves using adhesives or modified bitumen products that are applied at ambient temperatures. This method is beneficial for installations where high heat may be challenging to manage. Hot application, on the other hand, involves melting solid bitumen and applying it in a hot, liquid state, which provides excellent bonding and durability.

Layering with felt materials is a hallmark of BUR systems, allowing multiple layers to create a robust and weather-resistant roofing system.

Instantaneous adhesive bonding is not a recognized method in standard BUR applications. Unlike BUR, where layered felt and bitumen are critical for creating the roofing system's integrity, instantaneous bonding typically is associated with single-ply roofing systems or other types of roofing technologies that use adhesives for a quick setup, which does not align with BUR practices.