Pella® Impervia® Double-Hung Window

  • Made with Pella's patented Duracast® fiberglass composite material.
  • Operable sizes up to 3' 11-1/2" x 6' 5".
  • 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 Double-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 double-hung windows:

  • Traditional – equal vent unit.
  • Contemporary – provides the appearance of a fixed window over an awning window, but at a lower cost.
  • Cottage – provides the appearance of an awning window over a fixed window, more cost-effectively.

  • Contemporary

  • Traditional

  • Cottage

Learn about all Pella Sizes and Shapes