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Forums >> Revit Building >> Technical Support >> Roof Overhang extension

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Fri, May 9, 2014 at 3:47:51 PM | Roof Overhang extension




Joined: Tue, Jan 27, 2009
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Hey everyone I am trying to model a roof with a very generous overhang. In reality this overhang would be an extension of the top chord of the truss. I am modelling this schematically at this point. Currently I have modelled the main roof which ends at the exterior face of the walls and then a second thinner roof as the overhang. Can I do this in one step as one roof??? I want to do it as one roof because at certain points it becomes difficult to impossible to align the roof slopes to facilitate joining them and keeping the elevations clean. Im using Revit 2014.

Thanks in advance!

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Wed, May 14, 2014 at 12:30:50 PM | Roof Overhang extension




Joined: Mon, Feb 13, 2012
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I don't see why you couldn't. Just have the shape of your roof include the portion you want to overhang. Also, if you sketch the roof with the select wall tool, there is an option for overhang and you can type in the amount you want.

You can read more about it in the Help file under "Roof Boundary Line Properties":  

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Wed, Feb 1, 2017 at 8:47:52 PM | Roof Overhang extension




Joined: Thu, Jul 30, 2015
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I have same question. The anserv about overhang is not corrent. I can add overhang BUT the insulation layer keeps extending till the end of roof insted of wall face - as in sketch. 

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Thu, Feb 2, 2017 at 12:02:33 AM | Roof Overhang extension



pijpiwo Avatar

Joined: Fri, Sep 3, 2010
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5 Stars: 20 Votes

If the rafter changes its size as the picture shows in post 1, I cannot see any other way than creating two roofs - main roof and overhang as OP did. If the rafter stays the same, you can still do as above, or again model two roofs, but this time main roof with an overhang and insulation only as a separate roof.

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Sat, Feb 4, 2017 at 2:20:07 AM | Roof Overhang extension




Joined: Tue, Aug 7, 2012
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There are several approaches here that you could take, but I don’t see doing this as monolithic construct, nor would I advocate that approach. The better approach is making it two roofs joined together, but instead of making both by footprint, do the main roof by footprint and the second roof (one with eave) by extrusion. This way, you can lock your extrusion sketch lines to the top of the top of the main roof so it will flex with the main roof. Additionally, you could parameterize the eave extensions and assign it to a global parameter. Overall, doing it as 2 roofs (by footprint or profile), will serve you better through the design process. Besides that: it’s the way it will be constructed in the field, so model it the way it will be built. That’s my mantra. Good luck.

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