Roofs in Pascal are drawn, not picked from a catalog: you trace a rectangular
footprint over your building and shape everything else — type, pitch, overhang,
trims — afterwards.
Give the roof its own level
A roof sits on the level you draw it on, so the usual workflow is to roof from one
level up:
- Click the + at the top edge of the level selector (Add level above).
- Switch the level view to Stacked (the Levels menu in the toolbar at the
top right of the canvas) so the walls below stay visible while you work.
- Draw the roof on that new, empty level — its corners snap to the wall corners of
the level below, so it lands exactly on top of your walls.
Keeping the roof on its own level pays off later: switch that level to Solo
or step below it in Stacked view whenever you need to furnish the rooms
underneath without the roof in the way.
Draw a roof
Pick Roof in the Build tab, then:
- Click to set the first corner of the footprint.
- Move the cursor — a live ghost of the roof follows — and click the opposite
corner to place it.
While you draw, the corners snap magnetically to the wall corners and edges of the
active level and the level below, so tracing a roof that sits exactly on your
walls takes seconds. New roofs start as a gable with a 40° pitch, ready to be
reshaped.
Roof types
A roof is a container of one or more segments, and the type is set per segment.
Select the roof, then click again to select the segment inside it. The Roof
Type section of the properties panel offers seven types:
Hip, Gable, Shed, Flat, Gambrel, Dutch, and Mansard.
Shape the roof
The segment panel gives you sliders for every dimension:
- Footprint — Width and Depth (0.5–25 m).
- Wall Height — the height of the walls the roof generates beneath itself
(0–5 m).
- Pitch — the slope Angle (0–60°), with quick presets 3/12, 6/12,
9/12, and 12/12.
- Structure — Wall Thick., Deck Thick., Overhang, and
Shingle Thick.
- Shape-specific controls appear for the curvier types — kink position for
gambrel, waist controls for mansard and dutch roofs.
- Position and Rotation sliders (with
-45° / +45° buttons) place the
roof exactly, and the Move action lets you drag it in the scene — press R
while moving to rotate it in steps.
Roof surfaces are painted with the Painting tool, like walls and floors — see
Materials and paint.
Trim a roof
Turn on Show trim planes in the segment panel to reveal draggable trim handles
on each side of the roof. Drag a handle to cut the roof back along that side — a
red section preview shows exactly what’s being removed. Use trims to fit segments
together or notch a roof around another volume.
Complex roofs
- Add segments — draw another footprint while a roof (or one of its segments)
is selected and the new rectangle joins that roof as an extra segment. That’s
how you build L- and T-shaped roofs.
- Duplicate — the Duplicate action clones the whole roof and hands it to
you in move mode, ready to drop elsewhere.
- Features — with the Roof tool active, the Build tab shows a Features
grid of roof accessories (skylights, chimneys, dormers, vents, and more). Pick
one and click the roof segment you want it attached to.
Roof walls and openings
Each segment is a complete volume: it generates its own walls under the roof
plane, including the triangular gable ends. Those faces behave like regular walls
for openings — you can place doors and windows
straight into a gable.
Delete a roof
The roof panel’s Delete action removes the whole roof; a segment’s Delete
removes just that segment and keeps the rest. Selecting a roof and pressing
Delete or Backspace works too. 
