Forums >> Revit Building >> Technical Support >> Roof by Face and Wall by face tools

amolese

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Joined: Fri, Jun 22, 2012
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Hello there. I created a conceptual mass and inserted it into a project environment. I was able to use the wall by face tool to create wall on the imported mass. However when building wall on the first floor I am unable to use the attach Top/Base tool to extend my wall to the roof, and that's because my rool is currently a wall by face. So I then delete and try using the roof by face tool on my imported mass, at least on the upper part that represents a roof, but in vain. It wouldn't create the roof. It would not even let me select all the mass elements. I am able to select and create roof faces on half but when I click on create roof, it comes with an error message can't make roof. Anyone has an idea how to make this a roof and not a wall?

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dgcad

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Joined: Thu, Mar 17, 2005
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Interesting model. I've never tried to create a roof by face with that type of shape. You may be out of luck ? Not sure. . .

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teafoe5

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Its a little hard to tell but I think your problem may be that the very base of that "roof" is at too much of a vertical angle and Revit roofs cannot create it at that angle

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amolese

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amolese

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teafoe5

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I'm not sure what you mean.. can't you just add a top offset to your wall up to the height that you need it?

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amolese

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amolese

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Hello there! I just thought I should let you know how I solved this problem. Basically the reason I couldn't create a roof for this shape with a roof by face tool was because the roof tool generally will not work on any surface that is near vertical or has a part that is. So what I did was to gradually reduce the slope of the form making sure I do not lose the overall look of my initial shape  till a point where it will allow me make my roof. Even then i had to change the thickness of the roof to a very minimum for this to work. Because still at that angle the cleanups between adjacent parts will not work, and the tool will refuse to create a roof. Anyway I managed to do it that way. Now I am faced with some other problem. As it will not allow me to create a thick roof, I had to use the wall by face tool to create another wall over the thin roof which will serve as the actual roof over the thin roof. Remember I needed an actual roof element so I can use the attached top/base tool to extend my walls to under the roof. Now I need to insert some velux window in the roof that is now a wall and also in the thin roof at the same position to allow light travel through the windows. The velux windows will normally insert well into both shapes without any problem. But my eyes are set on a particular window for it is a circular window and will harmonise better with my shape. This window family however is not a velux roof window so It stays vertical when inserted into my roofwall and my thin roof. How do I go about converting this window family into a velux window? Please see the image below. The roof you see in the image is the wall, the thin roof lies below it. I used the section box tool to slice my building into two to show you how the thin roof allows me to extend my walls to under the roof. The window family is the default Windows_Round_W-Trim that comes with revit. Does anyone know how to convert this family into a velux window. 

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