Revit won't make Roof

[zbubbas]

I was practicing building roofs last night on a house we did a while ago. After sketching the perimeter of the roof, I set up all of the slopes and gables, then pressed finish sketch..."Error Revit can't make roof". I am frustrated because I can't figure out what I am doing wrong? I can handle getting error # ID10T, but not "Revit can't make roof". I know Revit can model any building, so how do I model this one. I apologize for my inexperience but I have never been so excited about a work related piece of software. Thanks in advance.

[Bim Man]

i know that when i first started with revit i was miffed at that roof issue also. what i found is that it is not as easy as we would like to think. with in the roof menu there is a slope arrow function align eaves and with in the individual prop of the slope defining line there are individual props that allow you to set heel heights(base offset from level). it took alot of practice and cussing at my monitor. what i found that is most situations are do able with all the tools revit gives you but if you don't know about them it makes you very angry. try some of the training exer. on roofs and that may help.

[BillyGrey]

zbubbas,

I don't have time for a tutorial right now, but Revit will make that roof.

Check back. I'm pretty sure there will be 4-5 replies in an hour or two :)

Chin up mate.

Bill

[gregcashen]

Here's my attempt...all one roof...about 2 minutes total, but obviously a little off. Any ideas?

[hand471037]

Aslo keep in mind that roofs are hard no matter what, and more than once while working as a framer we were cussing and angry because the roof either didn't work as it was drawn or was impossible to figure out. :)

At least once you get that roof working it will really work- if you know what I mean.

Looks like if you make three sepirate roofs and join them together right you'll get what you want. If I find some time I'll give it a shot...

[pwmsmith]

Here's your roof. About 5 min max. Steve S could do it quicker, he's the roof wiz.

[zbubbas]

You guys rock!!! Now this roof stuff makes sense. I didn't realize you could break up the roof planes like that. This program is absolutely amazing. Thank you again for all of your help.

[aaronrumple]

1m 30 sec.....

[aaronrumple]

Damn - missed the intersection - took another 60 seconds....

[gregcashen]

I think you had it right the first time...how do you control which way the valley runs? (See my solution above for the difference)

[pwmsmith]

Aaron,
Did you first make the two roof and find the intersections them modify for the intersection?
I had some problems doing this with multi level plate heights , just don't have the technic to do in one go. Fall back was to do pieces, more time (yuk).

[zbubbas]

Hey Aaron,
Thanks for posting your solution. How the heck did you change the direction of the way the ridge / valley was formed. Everything else makes sense. Do I need to draw the sketch in a particular order? Thanks again for your help.

[aaronrumple]

I left 2 roofs in the file so everyone could see how that was done.

First I made the two roof. They of course overlapped. I then used Join Geometry to produce the intersection between the two a build the intersecting ridges and valleys. Then I edited each roof and used pick lines to place non-slope defining edges along the intersecting lines. Then repeated for the second roof.

[zbubbas]

Aaron,
I guess I ment the first roof that you posted, the one you did in 1min 30 sec. It is a single roof object instead of the 2 roofs that were joined together. How did you control the way the valley between the different portions of roof come together. Your first model was perfect. When I try, there is a valley added. On yours, there was a ridge. We have the same model from the looks of it, however one is built by revit differently than the other. I don't understand how to control if a ridge or valley is formed by revit.

[aaronrumple]

Some of the edges didn't define a slope....

[gregcashen]

Aaron, i think if you open my roof and your first one, you will find that the same edges have been made slope-defining, yet mine produces a valley while yours produces a ridge. It would be very interesting to see why this is the case. Your second one was actually an attempt to make MY roof and you had to fudge it with two, yet I cannot make yours with one...

[zbubbas]

I can't make it either. I have messed around with this for over an hour trying to figure it out. I have attached a picture of the difference. The one on the right is Aarons roof. The one on the right is Greg's. Both are one piece. Both have the same slope defining edges. Both are different when it gets built....what the heck is going on.

[Yman]

WOW!, I am curious how this happened also. I can't recreate the ridge. I thought it was one of the eave lines that had a different base offset, but yet was aligned to the rest of the eaves. It still didn't mater, I couldn't recreate what Aaron did. How did you do it. I am stumped!!

Y

[aaronrumple]

Here's a 6.1 vs. 7.0 issue.... If I do the roof in 6.1 - I get my first roof. If I do the same roof in 7.0 - I get the second. Will look into it more.

[gregcashen]

I think we need more control over this behavior...both roofs are possible in a version of Revit using one footprint...so it should be able to do either roof just fine. What about a tool similar to the "Edit Vertices" tool in blended solids that would allow you to join different vertices or specify whether a ridge should be a valley or vice versa?

This one needs fixing ASAP, as everyone does roofs and everyone expects them to work properly...and consistently!