Thermal insulation with the plaster façade (wet façade) technology is one of the most common building thermal insulation solutions. Such solution for improving heat technical properties in separating structures is widely used in Europe ever since 1960. Polystyrene foam is one of the most effective thermal insulation materials, capable of preserving heat technical properties over the span of a long time. The compliance of façade heat insulation technological solutions with legislature is provided for in Latvian construction regulation LBN 002-15 “Heat Technics of Separating Structures of Buildings”.
There are two types of polystyrene foam available on the market: “white” or EPS and “grey” or NEO EPS. Both types are different on the basis of their additives added to them during manufacturing process. The grey color in this case is gained thanks to graphite particles which allow improving the final product’s heat technical properties by up to 20%. Polystyrene foam is characterized by very low heat penetration (λ) which, depending on the selected type can be between 0.031 and 0.040 W/mK. The material shows very low water intake and, therefore, it continues function as an insulation material even in a direct contact with water. EPS is highly ecological and light, because it is mostly made of air (98%).
The plaster façade thermal insulation solution (ETICS (External Thermal Insulation Composite System)) is certified in line with ETAG 004 requirements. A proper documentation is a mandatory requirement if the thermal insulation project intends to attract co-funding by the European Union structural units. These documents strictly regulate materials to be used along with the applied development technology, thus giving the final consumer a certified system with longevity, elevated resistance against fire and the manufacturer’s guarantee.