Definition
A breathable weather-resistant barrier wrapped around the sheathing behind the siding. It blocks wind and bulk water while letting trapped moisture escape.
Why this term matters for homeowners
Exterior terminology typically points to water management, curb appeal, and how siding, gutters, and trim protect the structure behind them.
- Use this term to ask better follow-up questions during estimates.
- Look for this language in Learn and Evaluate guides to connect definition to decisions.
- Confirm how this applies to your specific roof age, pitch, and home layout.
Related pages
Category: Exterior