: a rough floor laid as a base for a finished floor
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Otzi’s proprietary composite subfloor provides a lightweight, highly insulating, and moisture-resistant base that supports long-term durability and energy-conscious performance.—Lyssanoel Frater, USA Today, 11 Nov. 2025 Also confirm where joists or subfloors exist before attempting to nail down your floorboards—some older homes have very little of either.—Brandee Gruener, Southern Living, 25 Sep. 2025 The previous owners had cut out a majority of the flooring and covered it with a piece of subfloor.—Colson Thayer, PEOPLE, 3 Sep. 2025 About 3,000 square feet of mats and subfloor were soaked inside the gym — most of it likely unsalvageable.—Adrienne Davis, jsonline.com, 14 Aug. 2025 See All Example Sentences for subfloor