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Thread: Cut roof at join location

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    Cut roof at join location

    Is there a way to have Revit automatically cut the portion of the roof out where the roof join/unjoin tool is used, rather than using the roof opening tool? a common example, is when you create a dormer. Most of the time, the portion under the opening wants to be removed

    i have a few conditions where two roofs meet. It looks fine in plan, but it causes a lot of issues in section. I am hoping that there is a way in which if i use the Join roof tool, that it can remove the section that is joined. is there a way to do this, or do I have to do it manually?
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    Administrator Twiceroadsfool's Avatar
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    Quote Originally Posted by katewood1989 View Post
    Is there a way to have Revit automatically cut the portion of the roof out where the roof join/unjoin tool is used, rather than using the roof opening tool? a common example, is when you create a dormer. Most of the time, the portion under the opening wants to be removed

    i have a few conditions where two roofs meet. It looks fine in plan, but it causes a lot of issues in section. I am hoping that there is a way in which if i use the Join roof tool, that it can remove the section that is joined. is there a way to do this, or do I have to do it manually?
    There is a Dormer tool, which cuts openings in the main roof, on the Modify Ribbon.

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    Forum Addict willsud's Avatar
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    As Aaron says, the Dormer tool is designed to do just this job. I use this almost every day and there are some problems with it (or maybe that's just me )
    Clicking on the main roof then click on the joined dormer roof produces sketch lines for the cut. If the dormer roof runs down to the eaves of the main roof then you can pick the edge of the main roof to close the sketch, OK out of the command and the area of main roof should be removed.

    Where I run in to problems is when the dormer has 'cheeks' - i.e. side walls. These need to penetrate the main roof at the time you are creating the cutout in the main roof using the Dormer tool, in order for the pick option to find an intersection with the wall plane. I hope that makes sense.

    Balkan Architect on Youtube has something on this - at around 4 minutes in to the video. You can see that he has left his dormer cheek walls running down to floor level so that they penetrate the roof plane which then allows him to pick the plane of the side walls to create the right shape of opening in the main roof.
    https://www.youtube.com/watch?v=JuXKPihwdhA

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