How much insulation is necessary?

According to the law, all construction activities in the country must comply with the National Building Regulations (approved in 1991). Specifically, Topic 19 of these regulations, which focuses on energy conservation, became mandatory in July 2002. Based on these regulations, the thermal resistance (R-value) of the building’s external components must not fall below a specific limit. “External components” refer to walls and roofs that are in contact with the indoor environment on one side and the open air on the other. Internal partitions or inter-floor ceilings are excluded. To determine the required thermal resistance, buildings are classified into four groups based on: Geographical location, Type of usage (Residential/Industrial), City size, Building floor area.