What Is a Sleeper Joist

Sleeper joists are wooden boards installed on top of an existing subfloor that are typically used as support for hardwood flooring. The sleeper joists follow the same arrangement and spacing as the main home joists located under the subfloor.

What is a sleeper framing?

Sleepers are placed between the deck surface and the ground or slab below it. A set of sleepers supports the decking and allows moisture and air to flow below it. … Sleepers can also stabilize a deck when the frame has gaps that are too large to properly support the chosen decking boards.

What is a sleeper on a deck?

A sleeper system is a substructure comprising joists that sit between a solid surface (such as concrete) and the decking. … The sleeper system enables adequate drainage and ventilation which, in turn, protects the deck boards from damage due to moisture build-up.