A typical porch roof is a simple roof having only one slope. Also known as a shed roof or lean-to roof, this type of roof can be attached to a wall face and be completely independent from the main roof. You create a porch roof by inserting a hip roof, then converting three sides to gables.
To create a porch roof:
Select Insert > Roofs > Roof by Picking Points, or click the Roofs button on the Building toolbar and select Roof by Picking Points.
In the catalog, select a hip roof to insert.
Select four points to define the outline of the roof. It may be easier to draw the roof out in space (away from the model), then move it into place later. Example
Right-click and select Finish to complete the hip roof. Example
Click on the roof edge that will be attached to the wall, or that will be the high side of the roof. The roof is selected.
Hold down the Shift key, then click on the plate line at each end of the roof. Blue grab handles appear on each of the three selected sides. Example
Right-click and select Properties, or select Edit > Modify Elements > Properties.
In the Roofs dialog, click the Hip button in the Roof Shape area of the Basic page.
In the Roof Shape dialog, click the Gable graphic.
Next you need to turn off the surfaces displayed beneath the gable ends of the roof. On the Basic property page, disable the Display Gable check box in the Parameters window.
Click OK. The roof is converted.
Deselect the roof by clicking in the drawing area.
Click on the front edge (low side) of the roof.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
If you want to change the elevation of the roof at this point, select the Support and Details tab, then edit the value in the Support Height edit box.
On the Support and Details page, enable the Raked radio button in the Soffit area.
Click OK.
Now all that’s left is to move the roof into place. With the roof selected, right-click and select Move Whole Element, or select Edit > Modify Elements > Move Whole Element. Click and drag the roof into position. If you need to you can adjust the length and width of the roof by stretching it. Just remember to select the appropriate edge first. Example
You can insert support columns under the porch roof if you want.
