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Forums >> Revit Building >> Technical Support >> Wall joining to roof problem
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Joined: Tue, May 12, 2009
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Because of the relative complexity of the roof, we’ve had to create it using multiple roofs. Now that we’ve gotten the roof looking the right way, we can’t get two walls to properly join to the roof. Those two walls happen to be at the intersection of two separate roofs (see attached images). Wall 1 joins/attaches correctly while wall 2 does not. Wall 2 will join up just fine with the roof if you detach it from wall 1, but obviously the two must to be joined. Every time you try to join Wall 2 to the roof, Revit gives you the warning “Can't keep wall and target joined” while highlighting Wall 2. Is there a way around this? FYI, the two roofs are at the same elevation. We are using Revit 2013. Thanks in advance guys.
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Joined: Tue, May 12, 2009
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Here's the section thru wall 2
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This is most likely happening because the two walls are cleaning up with each other at the corner and therefore are 'joined' to each other. To prove this try 'disallowing' the join at the intersection and see if that helps.
You can also create a sloped 'reference plane' (perhaps align and lock it) along the underside of the roof and 'attach' the wall to the refernce plane instead of the roof. Walls will 'attach' to other walls, floors, roofs and reference planes.
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Thanks for the reply. Wall 2 and roof 2 will clean up just fine if you disallow the join between wall 1 and wall 2, but you run into this same problem if you try to rejoin them afterwards. Placing a reference plane at the location you described seems to work, though. Here's one nit-picky thing about that though. See the attached images. As you can see, there is no diagonal line between the wall & roof at wall 1, but there is at wall 2 (because the wall technically ends at the bottom of the roof/reference plane). Is there a way around this? FYI, the wall/roof core layers are the same for both wall/roof 1 and 2.
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Joined: Tue, May 16, 2006
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Can you show us your roof? I'm curious as to why you did multiple roofs.
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The gable right past the steeple is what kind of makes it a challenge. I just didn't see any other way to do it than creating seperate roofs.
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All of those roofs except for the roof with the steeple and the portico appear to have the same base level. As such, those could / should all be one roof sketch.
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That's correct. All those roofs are at the same elevation. I wouldn't even know how to draw a roof with that interior gable thing.
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Joined: Tue, May 16, 2006
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One roof. You have to cheat a little. If you look, you will see I used an 1/8" roof jog at the top and bottom L. Instead, I think Instead I could have used a roor slope arrow there to make that slope.
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Thanks man. I'll give it a shot.
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WW, what version of Revit are you using? If you're using 2013 or earlier, could you upload that model so I can see how you sketched that roof? Thanks.
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The second image above is my original sketch and it shows where the slopes are. I have now changed the lower L and the upper L using a slope arrow as I suggested and two lines that meet at the peak. Look at the image.
Edited on: Fri, Jan 3, 2014 at 1:21:17 PM
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WW, I really appreciate your help so far. I understand the slope arrow thing now. Thanks. Take a look at the attached image. Won't those roof return be a problem?
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Only if they return under the gable .... and I would think the would for just a little bit. You could fix these with a little roof edge sweep, an in-place or a little roof. I might split off just that section of roof all the way done to the eave (so that I could define it easily) and do just that portion seperate.... As usual, you have multiple options.
Whatever you decide, I'm sure this was a good learning exercise.
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