trim to roof

[Anonymous]

I am having a devil of a time triming walls to the roof. Whether I select all walls and the roof together and trim in 3d or trim in 2d......the results are the same, little slivers of walls poking thru the roof plane. I used the hip roof tool and all the walls are joined properly....help!

Robert
Design One Groupe

[Anonymous]

This is a roof intersection problem...This happens to roof edges that do not properly align, especially at valleys and hips.

I tried writing an explanation, but it just didn't read well...

Check ArchiCAD help "Creating Roof Intersections"...It's a better explanation than I was attempting to write..

[Anonymous]

When I get difficult roof situations like yours, I drag the wall and the roof off to one side, normally 100'.

Then select the wall and roof(s) in 3D and execute the trim to roof.

Once done, drag back 100' to original location.

Works great particularly when you get complex walls and/or roofs.

Grant

[Djordje]

design wrote:
Whether I select all walls and the roof together and trim in 3d or trim in 2d......the results are the same, little slivers of walls poking thru the roof plane.

... which means ArchiCAD is overprecise and is noticing that your roof planes don't fit snugly.

The easiest way to solve this is to re-connect the offending roof planes (the places where slivers happen). Intersecting roof planes - select one with the roof tool active, CTRL click on another at the edge that should intersect. You might have to previously move one of the edges so that you have more space for the selection.

If the slivers are happening at the corners, that means that your roof planes are not covering the walls completely.

As usual, a screen shot would help immensely ...

HTH,

[Karl Ottenstein]

Djordje wrote:
The easiest way to solve this is to re-connect the offending roof planes (the places where slivers happen). Intersecting roof planes - select one with the roof tool active, CTRL click on another at the edge that should intersect. You might have to previously move one of the edges so that you have more space for the selection.

Just to add 2 cents to perhaps clarify more ... do not be deceived by the top edges of the roof planes meeting. If the bottom edges at ridges/valleys do not meet, that is where you will see the problem - because the trim operation is to the bottom of the roof (when you are trimming walls).

Yes, screenshot would help us.

Karl