underlayment

(redirected from underlining felt)
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un·der·lay·ment

 (ŭn′dər-lā′mənt)
n.
See underlay1.

underlayment

(ˌʌndəˈleɪmənt)
n
(Building) US a lower layer as under carpet or roofing tiles
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.underlayment - a pad placed under a carpetunderlayment - a pad placed under a carpet    
pad - a flat mass of soft material used for protection, stuffing, or comfort
underfelt - a carpet pad of thick felt