Place doors + windows in 3D

Click a wall, drop a door or window, set width/height/sill. Diaz cuts the opening, adds a lintel, and remembers the swing direction.

3 min read · Level: beginner

Quick answer

Step-by-step

  1. Switch to 3D view if you are not there yet (View → 3D, or shortcut 3). Select the wall you want to add an opening to — it highlights mint-green.
  2. Pick the tool: Toolbar → Door or Toolbar → Window. The inspector shows the default dimensions — 880×2010 mm for an interior door, 1800×1200 mm for a kitchen window. Adjust width and height before placing.
  3. For windows: set the sill height. The default is 900 mm above floor level for living rooms. Set 1100 mm for kitchen counters (over a backsplash) or 0 mm for floor-to-ceiling glass. The value sticks for the next window you place on the same floor.
  4. Click on the selected wall to place. Diaz automatically cuts the opening through both faces of the wall and adds a lintel above (default 100 mm steel angle for openings >1500 mm; reinforced concrete for wider). Lintel material is set in Settings → Structure → Lintels.
  5. For doors: set swing direction. Right-click the placed door → Swing direction → pick LH (left-hand), RH (right-hand), LH-reverse, or RH-reverse. The 2D plan shows the swing arc; the 3D view shows the door open at 30° as a reference.
  6. Slide the opening along the wall: click the door/window and drag horizontally. Diaz snaps to wall-thirds (1/3, 1/2, 2/3) and to a configurable offset from corners (default 100 mm) so doors never end up flush against a corner stud.

Watch out

  • Swing direction wrong on plan: LH vs RH conventions differ per country. In NL/EU, looking from the room you are entering, "LH" means hinges on the left. Verify by checking the 2D arc — clients usually find errors here before the contractor does.
  • Sill 900 mm default in bathrooms is too low: for privacy, set 1500 mm or higher in bathrooms. The default is fine for living and bedrooms, but Diaz does not auto-adjust by room type. Set the sill per window.
  • Lintel auto-add overrides custom structural detail: if your architect specified a different lintel (e.g. timber instead of steel), the auto-add still places the default. Right-click the opening → Lintel → Custom to override per opening.

Related

Diaz Editor is one-time €99 lifetime for the first 100 founding spots. See the beta page.