Vinyl Siding

Related terms

• Water Table / Belt Course

  A projecting horizontal trim that visually breaks a tall wall and sheds water at a transition between siding types or stories.

• Under-Deck Drainage

  A membrane or panel system below the joists that channels water away, creating dry usable space under an elevated deck.

• Weather-Resistive Barrier (WRB)

  House wrap or building paper behind the siding that drains incidental water and blocks air while letting the wall dry. The wall's seconda…

• Tropical Hardwood (Ipe)

  Dense, durable hardwood decking (ipe, cumaru) that lasts decades but is heavy, hard to fasten, costly, and needs sourcing diligence.

• Weep Hole / Weep Screed

  Drainage outlets at the base of brick veneer or stucco that let trapped water escape. Blocked weeps trap moisture and rot the wall.

• Trim / Casing (Exterior)

  The boards around windows, doors, and corners (wood, PVC, composite). PVC/composite trim resists the rot that plagues painted wood trim.

• Window Flashing Integration

  The shingle-lapped sequencing of sill pan, jamb, and head flashing with the WRB so water always drains out and down, never into the wall.

• Thermal Movement (Composite)

  Composite/PVC boards expand and contract with temperature more than wood; gapping and fastening must follow the maker's spec or boards bu…