Level : Intermediate
Achieve a roof extension and a change in slope in a few steps with Cedreo.
Offset the main roof
- To create a bonnet roof, first offset the main roof to the desired distance from the starting point of the bonnet roof.
- If the bonnet roof is only on part of the building, you may need to recenter the ridge.
- To do this, click on the edge of the roof and use the 'ridge offset' option to recenter the ridge.
Draw a complementary roof
- Next, draw a single-pitch roof to create the break in slope.
- Click on the edge of the roof that should be the lowest and check 'bottom slope' to set the complementary roof in the correct direction.
- In the parameters on the right, adjust the roof height to match the height of the main roof if needed.
- Using the 3D visualization window, adjust the slope of your roof until the roofs complement each other.
Modify the main roof
In this case, we are creating a partial bonnet roof, so we will now modify our main roof.
- First, offset the second roof so that it only covers the extension.
- Then, adapt the shape of the main roof by adding three points using the dedicated button in the right column.
❗ Once the wall length is restored, remember to recenter the ridge by setting it to 0.
Modify the complementary roof
The two roofs complement each other, but a slight defect may be visible. The complementary roof does not cover the walls entirely, creating a gap between the two roofs.
To correct this defect, go to the 'Layout' step and draw an additional wall under the extension roof.