English version

underfelt in House topic

From Longman Dictionary of Contemporary Englishunderfeltun‧der‧felt /ˈʌndəfelt $ -ər-/ noun [uncountable]  British EnglishDHH soft material that you put between a carpet and the floor
Examples from the Corpus
underfeltTogether with thick carpet and underfelt, it should go a long way to pleasing the occupants of the flat below.It is loose laid on underfelt like an enormous rug with a surround of polished wooden floors.