👉 Onlaying is a technique used in architecture and design where a layer of paint or other surface covering is applied to a surface, typically a building wall or ceiling. This can be done with various materials such as paint, plaster, or glass tiles. In architectural terms, it refers to the process of applying paint or other surface material to a wall or ceiling without the need for a concrete slab or similar foundation, which allows for easier construction and faster completion times. It is often used in areas where