https://communities.bentley.com/products/building/building_analysis___design/f/energy-simulation/209915/how-do-i-edit-glazing-properties-for-doors-and-windowsHow do I model an external door with glazing? I understand that for the Part L calculation, the software treats any door with more than 50% glazing as a window, but how do you set the glazing percentage on a door? I&#39;ve also altered the default glazingen-USTelligent Community 12https://communities.bentley.com/thread/634725?ContentTypeID=1Thu, 18 Feb 2021 16:49:08 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:00c6a420-e110-4b10-a5bc-1bdf9b244424Shane Regan<p>Hi Ralph,</p> <p>If you are running a PartL calc then you can change the frame factor by editing the&nbsp;individual surfaces on the Misc tab as below. Please find further <a href="/products/building/building_analysis___design/w/building_analysis_and_design__wiki/48429/window-shading-and-blinds-in-partl">info here.</a></p> <p style="padding-left:30px;"><img alt=" " src="/resized-image/__size/640x240/__key/communityserver-discussions-components-files/343683/pastedimage1613666856048v2.png" /></p> <p>For PartL calculations you are correct that a glazed door is recognised as a window if the glazed percentage is over 50%, and recognised as a normal door if less than 50%.</p> <p>So, should your door contain over 50% glazing the current workflow for PartL is to instead add this surface into your building model as a normal window.</p><div style="clear:both;"></div>