A preliminary layer of sheathing or structural decking laid across the framing of a platform, roof, or bridge. It provides a continuous, rigid base that distributes loads and serves as the attachment substrate for the final exterior finishing materials, waterproofing membranes, or wear layers.
Heard on the job
We need to put down three-quarter-inch plywood for the subdeck before the waterproofers get here on Tuesday.
Also heard as
- subdecking
Do not mix it up with
- Subfloor: A subdeck is typically outdoors or part of a roof structure, while a subfloor is inside a building under finished flooring.