A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. They may also be referred to as a drop ceiling, false ceiling, or suspended ceiling, and are a staple of modern construction and architecture. The area above the dropped ceiling is called the plenum space, as it is sometimes used for HVAC air return. The plenum space is also very commonly used to conceal piping, wiring, and/or ductwork.
Armstrong ceilings are mostly used in spaces with very extreme conditions – high humidity, noise or pollution. They are very cheap way to escape from those factors and are used to accomplish heat and acoustic insulation, in offices where is needed to fit a lot of cabling and multimedia. The tiles could be removed easily which makes the access to the ceiling very easy. There is Armstrong ceilings with metal tiles. Usually they are used for exteriors based on their high stability against the climate conditions.
PVC ceiling system is light in weight, moisture resistant and reduces condensation and subsequent dripping from ceiling onto work surfaces. The cleanable, non-absorbent surface is UV stable and will not discolour. PVC ceiling systems solves the problem of dirty, unhygienic ceilings that are difficult, and expensive to clean by providing a bright, durable and hygienic surface, which is easily maintained. This extremely practical ceiling system is suitable for any area requiring a fixed, non-porous, non-fibrous and non-absorbent ceiling.