Join Thiago Mundim for an in-depth discussion in this video Modeling roofs, part of ArchiCAD Essential Training.
- [Voiceover] Now it's time to start adding some roof panels to this house. Now I'm gonna go here to the 3D on the F3 and I believe the original design is not meant to have roofs on this house, I think the idea was to have a green roof or a gravel roof, but for this course we're gonna add some roof so we know how to do it. Let's go back to the floor plan and go straight to the roof level. To add a roof we go to the roof tool here. I'm gonna click on it and use the shortcut Command + t or Control + t if you're on a PC, and here on the roof settings the first thing on the geometry and positioning that we have to choose is the height of the roof reference line.
You're gonna see as we add a roof that the roof has a reference line and here we can choose the right height of it. I'm gonna make it zero for now. Next we can choose the structure of the roof, if we want a generic structure or a composite structure. We don't wanna do composite right now, so let's change it to generic, and once you have generic you can change the thickness of it. Let's imagine that this is gonna be a roof tile, so 70 millimeter should do. Then we're gonna change the material from timber to a roof tile, so I'm gonna change here to roof tile.
Good. Next we can choose the geometry of the roof. If we wanna draw every single plane or if we wanna draw a complex geometry, so we're gonna do both. Let's start with the complex geometry. Next we can choose the inclination of the roof. Right now it's 45 degrees. You can change from degrees to percentage, whatever you prefer, I'm gonna keep it degree and let's do a lower inclination, so 30 degrees, and finally you can choose how you want the edges of the roof to look.
You can do a custom angle, let's keep it 90 degrees, and let's go ahead and press OK. Now I'm gonna start drawing the roof, so I'm just gonna follow the shape of the house here. Over the polyline, I'm gonna go around and ArchiCAD will calculate the planes of the roof based on our angles. Let's add temporary section here so we actually see what we are modelling.
I'm gonna put a section here, click on the first point, second on point, now choose where the section is gonna look at. I'm gonna right click on the section and open with the current settings. There we go. Here is the roof plane that we just added and as you can see the reference line, which is the point that I have chosen here to be zero, is exactly on the zero level of this roof level. If I go here and change it to, let's say 300, you can see that my roof line has moved 300 up.
Let's use the measure tool here or the shortcut m and measure from this point to the zero, so 300. If we go to the plan in the roof level, you can see that this reference line is this one here with this little line showing where the inclination of the roof is. Don't worry, this is not gonna get printed but you can see where the roof has that 300 height. Let's do a more complex roof here.
I'm gonna use the same roof settings, so I drop this roof and I'm gonna just play around a little bit. Let's do a more complex-shape roof, so I'm gonna do a little bit of break here and then turn 90 degrees. I'm gonna do another large shape here and then finish, so ArchiCAD has already solved out the plane for us. Let's take a look at the 3D.
Here we have our new complex shape, so you can go at any time, select this roof, change the inclination of it. Let's make it 45, so it's a little bit bigger. Let's go back to the plane and now let's take a look how we actually make one plane per time. I'm gonna delete this roof here and we're gonna create one plane roof on this house. I'm gonna go back to the design toolbox, select the roof, let's go to settings. I know this is gonna be too big for the house, I know it's a very low roof, so I'm gonna change it to 2%, and before I start adding the roof I have to change the geometry method from multiplane to a singleplane method.
On the singleplane method, the first thing that ArchiCAD is gonna ask me is, where is that reference line? Where is the pivot line? I'm gonna say that, the pivot line is here right at the edge of the wall, and always ArchiCAD is asking me, where is the upward pitch of the roof? I have to click where in this line is the roof gonna go up. I'm gonna click here, so the roof is gonna go up here. Now just draw the polygon of the roof.
I'm gonna draw from here to here, here, here, and close. Now we have one plane of the roof. I can select it and I can, just like a slab or a polyline, I can change the shape of it, I can add notes. I'm gonna offset a little bit here about 200, let's say we're gonna have a gutter here and let's go back and take a look on our section. There we go.
It doesn’t look correct, so I'm gonna select it, Control + t. It still has the 45% inclination. Instead of changing inclination here, I'm gonna do it in the roof. First thing I'm gonna do is lower that a little bit. Let's lower about 250 for now, and then I'm gonna click on the roof, and on the part pilot here, if we get the right point, you can change the thickness of the roof or the inclination of the roof.
Instead of editing these on the settings, I'm actually editing on the section. I'm gonna change these to a point here and then lower a little bit more, so we have some room, and that's more or less what I want. Let's see what the result angle of the choice, two degrees should be fine for now. Well again this is just for the exercise, I don't think this house was meant to have a roof, so let's see how it looks in plan.
One last thing I wanna show you before finishing with the roofs is how to add structure to this roof. There is a very easy way to do that in ArchiCAD. I'm gonna add structure to this complex roof here. All you have to do is select the roof you want or the roof planes you want, if you have more than one, go to design, roof extras, and then go all the way to roof wizard. The roof wizard settings allow you to edit every element of a roof, like from rafters, beams, palace, trimmers, and ridges.
I'm not gonna change any of that, I'm not gonna change the material of the roof as well, I'm just gonna go ahead and press OK, and ArchiCAD takes a little bit of time calculating this structure, and there we go. If I select this roof and press the F4 in the Mac or the F5 in the Windows to show only the selection in 3D, we can see that we have calculated roof structure here. I don't really use it for building purpose but I like to show that the roof has a structure when I put a section on it.
Just bear in mind that if I press F4 or F5 on the PC here again to bring everything up, just bear in mind that this roof is in the middle of my other roof. I'm gonna select it and use Control + d to move it down a little bit, so I have it below the roof or I could have done that in a section as well. Still not in the right position but at least it looks good. Let's go back to the plan and delete this because we don't really need it and just to show you how quick it is again I'm gonna do it for this single plane that we have.
I'm gonna go to design, roof extra, roof maker, roof wizard, I'm not gonna change anything, just press OK, and here we go, we have a roof structure for this roof. Now go ahead, give it a try, make the roof for this house.
- Opening and navigating an ArchiCAD project
- Setting up working units and stories
- Importing drawings
- Modeling walls, slabs, doors, and windows
- Grouping and ungrouping objects
- Creating sections and elevations
- Working with dimensions
- Publishing drawings
- Modeling and documenting detailed designs
Skill Level Appropriate for all
Q: This course was updated on 06/14/2017. What changed?
A: The following topics were updated: using the Stair tool and working with objects. In addition, new videos were added that cover what's new in ArchiCAD 21, stair settings, working with railings, railing settings, using the Multiply tool, and 3D styles.