Fit-out & Add-ons¶
Step 3 fills the building with its interior and attached parts. At the top you pick the floor (Ground floor, Floor 1 …); below it, via the mode switch, the component you're currently working on. You set the values on the right in the parameter panel; placed parts are removed via the components list in the right-hand column.
Choosing floor and mode¶
The switch offers up to 8 modes. Which are available depends on the model and the selected floor:
| Mode | Available |
|---|---|
| Interior walls | always |
| Stairs | from 2 floors, and only on a floor that has another floor above it |
| Slab cutout | from 2 floors, only in the slab of an upper floor (not on the ground floor) |
| Chimney | always |
| Balcony | only from the 1st upper floor (floor tab on an upper floor) |
| Terrace | ground floor only |
| Canopy | from 2 floors |
| Column | only when a balcony or terrace exists |
Visible vs. locked
Stairs and Slab cutout always stay visible and are only grayed out when they aren't possible on the current floor. Balcony, Terrace, Canopy and Column appear only once their condition is met.
Place by clicking
Components you click into the model (chimney, balcony, terrace, canopy, column) show yellow = valid, red = invalid while you place them.
Interior walls¶
You draw walls click-by-click straight into the floor plan — as a chain, until you dock back on (Esc or right-click ends it). It snaps to endpoints, corners and faces.
| Setting | Value |
|---|---|
| Clear width | by entry (at least 0,05 m) |
| Wall length from start point | by entry |
| Angled walls | on a 15° grid (0/15/30/45/60/75/90°) |
| Half-height wall | cut at 0,90 m above the floor |
- Wall thickness fixed at 0,15 m.
- Up to 60 interior walls per floor.
- Clicking into a closed area assigns a room name (1–40 characters). Below the name the room's clear floor area is shown in m².
Stairs¶
One staircase per floor; it leads up into the next floor.
| Setting | Options / Range |
|---|---|
| Type | Straight · U-shaped — two pictures showing the stair from above |
| Flip (U-shaped only) | swap entry and exit |
| Corner | left · right |
| Run length | 40–160 % (2 % steps, default 100) |
| Stair width | 40–160 % (2 % steps, default 100) |
| Direction | the space bar turns the stair by a further 15°; the angle is listed under the key figures |
Number of steps
The number of steps and the actual run length follow from the floor-to-floor height. The percentages only scale the tread depth or the width — the step count stays the same.
Slab cutout¶
Rectangular holes in a floor slab, e.g. for a stair opening. Placed by clicking into the slab.
| Setting | Value |
|---|---|
| Alignment | four arrows |
| Length · Width | freely chosen |
| Distance to wall | four wall distances by entry |
Several cutouts may overlap (forming an L-shape); up to 20 per slab.
Chimney¶
A hollow masonry stack on a wall edge that runs from a given floor up through all the floors above and out over the roof. Placed by clicking a wall edge.
| Setting | Options / Range |
|---|---|
| Side | Inside (on the wall's inner edge) · Outside (on the facade) |
| From floor | selection |
| Length in X | 0,30–1,50 m (5 cm grid) |
| Length in Y | 0,30–1,50 m (5 cm grid) |
| Height above roof | 0,80–3,00 m (5 cm grid) |
Roof overhang
If the chimney reaches further out than the roof, the app reports a roof overhang that's too small (+10 cm recommended). The warning can be ignored.
Balcony¶
Only from the 1st upper floor, on an exterior wall. Placed by clicking.
| Setting | Options / Range |
|---|---|
| Type | Rectangular balcony · French · Corner balcony |
| Parapet | closed · balusters |
| Depth (rectangular balcony) | 0,25–4,0 m (5 cm grid) |
| Width (rectangular balcony) | 0,5–30 m (10 cm grid) |
| Width (French) | 2,0–5,0 m (10 cm grid) — the projection follows from the width |
- Corner balcony: click connected exterior-wall segments around a corner; depth either the same everywhere or per side, plus a distance to the outer corner.
- Structure above: optionally a canopy or another balcony on the floor above, optionally with columns (corners only or evenly spaced).
Terrace¶
Ground floor only — essentially a balcony for the ground floor, on an exterior wall. Placed by clicking.
| Setting | Options / Range |
|---|---|
| Type | Rectangular terrace · Corner terrace |
| Railing | none · closed · balusters (default: none) |
| Depth | 0,25–6,0 m (5 cm grid) |
| Width | 0,5–30 m (10 cm grid) |
Passages: clicking a railing segment sets an opening in the railing (width and position free), at least 0,15 m from every railing corner.
Canopy¶
A sloped roof slab on one or more exterior-wall segments; it sits in the wall of the 1st upper floor (hence from 2 floors). Placed by clicking.
| Setting | Options / Range |
|---|---|
| Type | Rectangular canopy · Corner canopy |
| Wall connection height | from (ground-floor floor-to-floor height + 0,10 m), up to 1,00 m above it (5 cm steps) |
| Roof pitch | 0–75° |
| Depth | 0,3–5,0 m |
| Width | 0,5–30 m |
The corner canopy runs across connected exterior-wall segments around a corner.
Column¶
Stands on the deck of a terrace or balcony — so it's only available once one of them exists. Placed by clicking a terrace or balcony edge.
| Setting | Options |
|---|---|
| Type | Corner column (sits fixed in the nearest corner) · Free column (position along the edge) |
| Target | up to floor n · up to the roof |
Columns are always possible on the front edge, on side edges only from 2 m projection.
Target 'up to the roof'
If the roof overhang is too small, the "up to the roof" option stays locked.
Continue with the Openings (Step 4). Technical terms like eaves, ridge or knee wall are in the Glossary.