Revit 2016 beginner roof problems

[hannah.m.skinner21]

Hey there, I bought a textbook to teach myself Revit. Overall it's pretty good but I'm confused on the section where it teaches you to draw roofs.  When I drew a roof I made sure I was on the view of the floor plan of the upper most floor, but then it would create the roof on the bottom of that floor rather than the top, where the roof should go.  This was confusing enough, but the book explained that the wall height should automatically cut to where to roof was placed, so I guess it was supposed to cut to the bottom of the second floor, which it did, but then it didn't cut the rest of the floor. 

Can someone explain to me why Revit draws roofs on the bottoms of floors (it seems very unintuitive) and also why in this instance why it did not adjust the wall height and how to make it do so? I'd really appreciate it as I'm quite confused.

[barthbradley]

Roofs are hosted to LEVELS, not walls.

...so, if your walls are sitting on Level 1 and extending to Level 2, you would sketch your roof on Level 2.  

...as for attaching your walls to the roof; that's a separate action.  When you finish sketching your roof and exit out of sketch mode, Revit will ask you if you want walls to join the Roof. I usually say no.  I like to join the walls to the roof myself using the Attach tool on the wall contextual tab.  

[ToanDN]

You can create a Roof Level where you want the plate height is and draw the roof hosted on that level with 0 offset (pic1).  or you can draw it on the top floor level and give the roof an offset from that level to bring it to the desired elevation (pic2).

When you done draw the roof, revit normally as you to attache the walls below to the underside of the roof.  It is up to you to answer yes to accept it, or no and you can do it later by select the walls and use attach top/base from the modify menu.

[barthbradley]

Check this Video Out!!! 

https://knowledge.autodesk.com/support/revit-lt/getting-started/caas/CloudHelp/cloudhelp/2016/ENU/Re...

[hannah.m.skinner21]

Here's a screenshot of my revit project, resulting from the page I took a picture of. (Sorry it rotated- don't really know why) Your explanation makes sense but it seems like quite a different technique than the book has, and I'm still confused about the paragraph at the bottom of the page where it said the wall height would adjust to the roof? If you could provide further insight I would be very grateful. To clarify, the book had me rename level 2 to T.O Masonry.

[hannah.m.skinner21 · Accepted solution]

Oh I understand what the problem was.  The buildings were created with an array, making them a group.  The wall height for individual buildings couldn't adjust because they were grouped.

[ToanDN]

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@hannah.m.skinner21 wrote:

Oh I understand what the problem was.  The buildings were created with an array, making them a group.  The wall height for individual buildings couldn't adjust because they were grouped.

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You can edit one group, add the roof, attach the walls to the roof, finish, and all groups will be updated.

[barthbradley]

You can still attach grouped walls to roof.  Tab-Select on the Group until you catch a wall; then right click on it and click on "Select Joined Elements".  All the walls will highlight together. Then from the Contextual Tab, select "Attach Top/Base" and then pick the Roof. All the wall will attach.  Again, it is not necessary to attach walls when doing the Roof.  Probably better to get in the habit of not answering that prompt with a "yes" vote.