"Suburban Construction recently installed new siding, windows and doors on our home. The quality of Suburban's products are excellent. I would refer them to anyone – they have always done an excel... » more
- Les and Kathy Hudnall of Coyne Center, Illinois


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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

For furthur reading please see our Learn the Basics Homepage.