Pella Corporation is one of the world's leading manufacturers of premium-quality window and door products. The Pella brand offers a full range of quality residential and commercial products under distinct product lines crafted from wood: Architect Series®, Designer Series® and ProLine®.

In 2003, to provide an advanced alternative material that offers lasting value in windows and doors designed to withstand extreme heat and excessive moisture conditions, the company introduced the Pella® Imper ...