subfloor
/ˈsʌbflɔr/
noun
- A layer of material, such as plywood or concrete, that is laid directly on the joists or foundation and serves as a base for the finished floor.
- Water damage had rotted the subfloor, so we had to replace it entirely.
- The new subfloor provides a level surface for the tile installation.
- The carpenter installed a plywood subfloor before laying the hardwood planks.
Synonyms