Archimesh still earns its keep when you are blocking in a house: doors, windows, stairs, railings. The door pass is already on the site. This is the window step from the same Architectural Design & Animation workflow, written as a short studio note rather than a full lecture.
You already have a floor plan in Blender, wall openings, and doors on the ground floor. The job is to drop a parametric window on each opening so the glass sits in the wall, the sill reads on the plan, and you are not nudging orphan meshes by eye.
Turn the add-on on
Edit → Preferences → Add-ons, search Archimesh, enable it. Press N for the sidebar and open the Create tab. Archimesh lives there. Expand it and you get the parametric objects. For this pass you only need Window.
Get the 3D cursor on the opening
Archimesh places the window at the 3D cursor. If the cursor is still in the middle of the room, the window lands in the middle of the room — same failure mode as doors.
Select the ground-floor plan and isolate it with / (numpad slash). In the snap menu set snap to Edge Center. Shift-right-click, then Ctrl, to snap the cursor to the centre of the window opening. Check the cursor in the viewport before you add anything. If the opening sits above a sill line on the plan, snap to that edge centre, not the room mid-point.
Add the window
In the Archimesh menu, add Window. You get a small hierarchy, not a single mesh: frame, glass, and a parent object that drives the Boolean hole (same idea as Ctrl_hole on doors).
That parent is the one that matters. It shows as bounds in the viewport, it does not render, and it is the cutter that punches the opening in the wall. Select the parent and press G: the whole window moves. Leave the glass alone until the parent is on the wall.
Set width and height in the Archimesh parameters before you apply anything. Match the opening on the plan. A typical domestic window might sit roughly 0.9–1.2 m wide and 1.0–1.4 m high; use your drawing, not a guess.
Sit it on the wall axis
If the window is on a wall parallel to Y instead of X, rotate the parent 90 degrees in the rotation field, then check the cut again. The glass should sit flush in the wall thickness, not floating outside the façade.
If the window is too high or too low, move the parent on Z until the sill reads against the plan. Do not scale the glass mesh by hand — change the Archimesh height, then re-check the Boolean.
Do the rest of the openings
Same sequence: isolate the plan, snap the cursor to Edge Center, add Window, rotate the parent to the wall, set width/height, check the sill. Ground floor first, then first floor. Skip doors you already placed. Do not apply the Archimesh parameters until you are happy, or you lose the parametric width and height.
How to use Archimesh in Blender
Add Archimesh doors in Blender without fighting the 3D cursor
Next step in the house block-in
If you want the full Architectural Design & Animation path — plan, Archimesh openings, materials, and camera work — take the course on Udemy with this instructor link:
