Creating Roof

Let’s go further with our tutorial. In the last tutorial, we learn about creating floor. Now we are going to create roofs. There are 3 ways to make roof. By footprints, extrusion, and by face. In this tutorial, we will discuss about creating roof by footprints.

Open your floor plan view: roof. We will create two roofs at this level. First, roof slab surrounding our building as concrete gutter, and a sloped roof. (I hope I use the right term, not really familiar writing this in English).

Creating roof slab

Using footprint method is similar with creating floor. We will have to sketch it. You can access this tool from your ribbon, build group. Clicking this will bring you to sketch mode.

What we will do is exactly the same with what we were doing when creating roof. You can either using pick walls or by drawing lines. To create this roof slab, deactivate define slope.

Click roof properties button at your ribbon. Change your roof type to Generic – 125 mm.

Draw your roof sketch as below. At this example, I create the left and right line by picking walls, and finish the rest by using line sketch with 500mm offset. You can change the offset value on option bar, then snap to your walls.

Don’t worry about the exact size. You can change the values as you feel appropriate. Remember: make sure it’s a closed polygon.

Now, change the offset value to 800, and create another polygon inside the first one.

After you finish, click finish roof. When Revit ask your confirmation to attach your walls to this roof, select no. Review your model in 3D view if necessary.

Creating Sloped Roof

Next, we will add a sloped roof at this level. Open your roof level plan.
Activate roof by footprint tool. This time, make sure define slope option is active. Click roof properties, change ‘Base Offset from Level’ value to 200. This will create your roof 200 mm above the roof level.

Now, use the line mode for drawing your sketch. Change offset value in the option bar to 200. Create your roof sketch by snapping to roof slab you created before.

Click finish roof, and review your model in 3D view. Very easy, right? Let’s do some modification to this roof. Open your roof plan view, then select your sloped roof. Click edit footprint from your ribbon.

Make sure modify tool active. Hold [ctrl] key then click these lines below.

Turn off define slope in your option bar. You will see the slope symbol disappear from those edges.
Now select two edges at the north (bottom) you’ve just modified. Hold [ctrl] for add objects to your selection set, then click your edges. Activate move tool from ribbon.

Click anywhere on your screen, move your pointer down. Type 300 then [enter]. This will add offset to these edges. Do the same with the other edge you modified. Move it to south for 300 mm. Click finish roof.
Let’s review our model in 3D view.

You can see there are gaps between your walls and roof shown by the arrows. Let’s fix this.
Select wall below the arrow, then click attach in your ribbon, modify wall group.

Select your sloped roof. Do this step for every wall below roof edges that we’ve modified.
If you want to add roof pattern, you can read this tip: Add pattern to your roof.
In the next tutorial, we will create roof slab edges, and create a roof with extrusion.