With recent changes in energy codes and the desire to make fenestration products more energy efficient, butt joint and mitre corner windows are becoming less common. Most customers assume that having double pane glass in a corner window assembly means a large post and a lot of space between the glass. Fortunately there are a number of options on the market in both aluminum and aluminum clad wood windows that offer clean, contemporary lines.
The following photos highlight three different corner window options offered by Marvin Windows and Doors.
![Marvin Direct Glaze Corner Unit, Shows One Side of the Corner Unit with the Post Between the Edge](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/Marvin-Direct-Glaze-Corner-Unit-IBS-Booth-3-768x1024.jpg)
![Marvin Direct Glaze Polygon, 90 Degree Corner Unit Showing Both Sides of the Window.](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/Marvin-Direct-Glaze-Corner-Unit-IBS-Booth-2-768x1024.jpg)
![Marvin Direct Glaze Polygon, 90 Degree Corner Unit Close Up Photo](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/Marvin-Direct-Glaze-Corner-Unit-IBS-Booth-1-1024x768.jpg)
![Marvin In Sash (Casement) 90 Degree Corner Windows with Insulated Glass. Photo From Marvin IBS Booth, 2014](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/Marvin-Clad-In-Sash-Corner-Window-Close-Up-1024x768.jpg)
![Shows both sides of Marvin's In Sash 90 Degree Corner Unit. From IBS 2014 Marvin Booth](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/Marvin-Clad-In-Sash-Corner-Window-IBS-Booth-768x1024.jpg)
The previous photos show options for insulated (double pane) glass. The options below are single pane with 1/2″ tempered glass.
![Marvin Direct Glaze Corner Unit with Single Pane 1/2" Tempered Glass](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/DSC_0028-680x1024.jpg)
![Marvin Bronze Clad 90 Degree Corner Unit](http://www.maringlassandwindows.com/wp-content/uploads/2014/02/DSC_0030-1024x680.jpg)
We also offer aluminum corner units with corner posts with insulated glass and without posts and a silicone joint. We will focus a future blog post on these all aluminum corner windows.