Perforated metal

The first perforators were laborers who would manually punch individual holes into the metal sheet.

This proved to be an inefficient and inconsistent method which led to the development of new techniques, such as perforating the metal with a series of needles arranged in a way that would create the desired hole pattern.

Studies have shown that perforated metals help reduce sound levels.

[4] Studies have shown that having buildings use perforated metal sheets in front of their façade can bring in one study 29% energy savings (HVAC + Lighting estimated consumption in 1 year) and in the second one 45% energy savings (heating, ventilation, air conditioning).

Depending on the location of the building (intensity of the external sun), solar irradiation can be decrease by 77.9%.