Pella® Impervia® Single-Hung Window

  • Made with Pella's patented Duracast® fiberglass composite material.
  • Bottom sash is operable, top sash is nonoperable.
  • Three sash splits available – Traditional, Contemporary or Cottage.
  • Operable sizes up to 3' 11-1/2" x 6' 11-1/2".
  • Performance Grade up to PG50.

A local Pella team member is ready to help you with your project.

Features & Options

Sizes and Shapes – Pella Impervia Single-Hung Window


Built-to-order in 1/4" increments.

View size tables


Add transoms or adjacent windows for flexible combinations.

View window combinations

Design Data

Design data available for egress, vent opening, clear opening, visible glass and frame area.

View design data

Sash Splits

Pella offers three styles of operable single-hung Pella Impervia windows:

  • Traditional – equal vent unit.
  • Contemporary – 24" or 30" lower sash vent unit.
  • Cottage – 42" lower sash vent unit.

  • Contemporary

  • Traditional

  • Cottage

Learn about all Pella Sizes and Shapes