subfloor

(redirected from counterfloor)
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sub·floor·ing

 (sŭb′flôr′ĭng) or sub·floor (-flôr′)
n.
A rough floor over which a finished floor, flooring material, or carpet is laid.

subfloor

(ˈsʌbˌflɔː)
n
(Building) a rough floor that forms a base for a finished floor