"We just wanted to tell you how pleased we are with the patio door that was installed and the Gutter Caps that were installed several weeks ago. The patio door looks great and we love the Gutter ... » more
- Harlan and Sandy Henzen of Davenport, Iowa


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Extension Unit

A framed fixed door panel, with a full-sized lite of glass, field-installed or shop-installed adjacent to a two-panel patio door, to make the door unit into a three-panel door.

Not quite sure what the proper home improvement terms are? Let us help. We have put together a glossory for you to learn a little bit more about Home Improvement Glossary and Terms

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