--- title: Configuring and Using Floating Mullions description: Guide on how to configure and use floating mullions --- [Skip to content](https://knowledgehub.endtoendit.com/knowledgebase/configuring-and-using-floating-mullions#main-content) [![integrate knowledge base](https://knowledgehub.endtoendit.com/hs-fs/hubfs/integrate%20knowledge%20base.jpg?width=386&height=34&name=integrate%20knowledge%20base.jpg)](https://knowledgehub.endtoendit.com/knowledgebase?hsLang=en) Open main navigation Close main navigation - [endtoendit.com](https://endtoendit.com/) [endtoendit.com](https://endtoendit.com/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [integrate Support Team Knowledge Base](https://knowledgehub.endtoendit.com/knowledgebase?hsLang=en) 2. [integrateDrawingBoard](https://knowledgehub.endtoendit.com/knowledgebase/integratedrawingboard?hsLang=en) 3. [Transoms & Mullions](https://knowledgehub.endtoendit.com/knowledgebase/integratedrawingboard?hsLang=en#transoms-mullions) # Configuring and Using Floating Mullions ## Find out how to configure and use floating mullions, essential for accessible escape routes in case of emergencies.   ### **Video Guide: Configuring and Using Floating Mullions** See how floating mullions are **configured**, and how the details appear on the **manufacturing details**.     ### **Key Points: Configuring and Using Floating Mullions** ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Jun-10-2025-05-38-41-2265-AM.png?width=670&height=323&name=image-png-Jun-10-2025-05-38-41-2265-AM.png)   **1. Recreate a mullion as a floating mullion.** 60mm mullion is a standard size for a range/company. In the given example, a **casement window** is made with a 60mm mullion internally, and 30mm externally. [![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Jun-10-2025-10-22-42-9093-AM.png?width=670&height=318&name=image-png-Jun-10-2025-10-22-42-9093-AM.png)](https://demo.integratejs.co.uk/SurveySystem/DrawingBoard/Lead/L33388/2/1)   Remove the mullion and the casements, replace them with a French mullion and tick  **has floating mullion**. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Jun-10-2025-10-27-16-1673-AM.png?width=445&height=50&name=image-png-Jun-10-2025-10-27-16-1673-AM.png)   **2. Meeting stile editor.** Casement stiles less glazing rebate are shown on the **mullion editor**. In the given example: **a.** **Casement stile less glazing rebate** = 18mm **b. Overall** = Master leaf + master LH stile = slave RH stile + 35mm mullion fixed to slave sash + 5mm clearance = 37 + 35 + 5 + 37 = 114mm  ***Note:** There is no gap on the slave leaf. The 5mm gap is taken up by the mullion, and 5mm is machined out of the slave side, giving 10mm stop left side, 15mm right side.*  ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Jun-10-2025-11-09-34-8563-AM.png?width=670&height=432&name=image-png-Jun-10-2025-11-09-34-8563-AM.png) **3. Default values and increasing mullion thickness.** Values are set on **French casement** default values.  In the given example, the **finished external mullion thickness** is increased by 5mm, from 30mm to 35mm. ![](https://knowledgehub.endtoendit.com/hs-fs/hubfs/image-png-Jun-10-2025-11-15-20-6433-AM.png?width=670&height=428&name=image-png-Jun-10-2025-11-15-20-6433-AM.png) **4. Default values and increasing slave sash stile.** Instead of increasing mullion thickness, the **slave sash stile** can be increased. This can be done on the **timber cutting list**. 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