Also means
cellar ceiling
Usage Note
Kellerdecke is the ceiling of the basement, which forms the floor of the ground storey above. Insulating the Kellerdecke from below is a common energy-saving measure in older German homes.
Examples
"Durch die Dämmung der Kellerdecke sank der Heizenergiebedarf deutlich."
Natural Translation
By insulating the basement ceiling the heating energy demand fell noticeably.
Literal Translation
Through the insulation of the basement ceiling sank the heating energy demand noticeably.
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