thermal insulation
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thermal insulation
Measures and materials that reduce the transfer of heat between two areas, for example the inside and outside of a building. It is used to save heating costs in winter and keep the house cool in summer.
Eine gute Wärmedämmung der Fassade kann die Energiekosten erheblich senken.
Good thermal insulation on the facade can significantly reduce energy costs.
The word is a compound of 'die Wärme' (heat) and 'die Dämmung' (insulation). 'Eine Dämmung' is a layer that shields or reduces something, in this case the exchange of heat.
Ohne eine funktionierende Wärmedämmung geht im Winter viel Energie verloren.
Without functioning thermal insulation, a lot of energy is lost in winter.
Common verbs in connection with 'Wärmedämmung' (thermal insulation) are 'anbringen' (to attach/install), 'installieren' (to install), or 'verbessern' (to improve). The location of the insulation is also often mentioned, e.g. 'die Dämmung der Fassade' (the insulation of the facade) or 'des Daches' (of the roof).
Wir lassen nächstes Jahr eine neue Wärmedämmung am Dach anbringen.
We're having new thermal insulation installed on the roof next year.
This word is used almost exclusively in the areas of construction, renovation, and energy efficiency. It is usually about saving heating costs and increasing living comfort.
Ein Energieberater prüft, wie gut die Wärmedämmung des alten Hauses ist.
An energy consultant checks how good the thermal insulation of the old house is.
insulation / isolation
'die Isolierung' and 'die Wärmedämmung' can both have to do with protection against heat loss. However, 'Isolierung' is broader: it can refer to heat, electricity, or sound. 'Wärmedämmung' refers specifically to heat, especially in buildings. It helps less heat escape outside in winter and keeps things from getting so hot in summer. The words can be confused because you often hear both when talking about houses. If it is only about heat and heating costs, 'Wärmedämmung' is more precise. If the area is not clear, or if electricity or sound may also be meant, 'Isolierung' fits.
Mit guter Wärmedämmung sinken die Heizkosten im alten Haus deutlich.
With good thermal insulation, heating costs in the old house drop significantly.
Die Isolierung im Dach schützt nicht nur vor Kälte, sondern auch vor Lärm.
The insulation in the roof protects not only against cold, but also against noise.