Drainage Plane

Related terms

• Flashing

  Thin water-resistant material installed at joints and transitions (roof-to-wall, around windows and penetrations) to direct water away an…

• Drip Edge

  Metal flashing at roof eaves and rakes that directs water into the gutter and keeps it off the fascia and sheathing.

• Downspout

  The vertical pipe carrying gutter water down and away from the foundation. Extensions or buried drains move it far enough out to matter.

• EIFS

  Exterior Insulation and Finish System — a foam-and-synthetic-stucco cladding. Energy-efficient but notorious for moisture failures if not…

• Decking Span

  The maximum joist spacing a given decking can bridge without sagging — varies by material and whether boards run straight or diagonal.

• Engineered Wood Siding

  Treated wood-strand siding (e.g., LP SmartSide) — lighter and more impact-tough than fiber-cement with a real-wood look; needs proper edg…

• Decking Board

  The walking-surface boards fastened across the joists — wood, composite, PVC, or aluminum. The most-visible and most-replaced deck compon…

• Exposure / Reveal

  The face height of siding left visible after the overlap. Consistent exposure is the mark of a quality installation.