What requirements should meet good thermal insulation applied in residential buildings?
Assuming that we think about residing in a house we build for at least 60-80 years, an insulation effectiveness of insulation layer should be during this period of time at least satisfactory. Therefore, selecting insulation materials several factors should be considered: physical properties, advantages and disadvantages. These shall influence the facility use for the whole abovementioned period of time. A vital role during such a long operating period plays aging of materials phenomenon, sublimation (insulation mass disappearance) and biodegradation. It is noteworthy to consider whether insulation material has excessive hygroscopic properties (whether absorbs water), and if it sufficiently prevents water vapor diffusion into insulation depth. This has an important impact on insulation effectiveness, furthermore water in an insulation layer may cause metal structures corrosion, or decay of building timber frame. It is also vital to know that outdropping water inside the insulation layer
