Angled walls are the normal case, not the exception. Almost no room is truly square — framing drifts, plaster builds up in the corners, an old house settles, and a bay or a chamfered return was never at 90° to begin with. If you draw the room as a rectangle and discover the truth on installation day, you are scribing fillers on site and explaining the gap to the customer. This page is about getting the room into Pro100 as it actually is. For the carcass geometry of the cabinets that go into it, see angled and corner cabinets.
Measure the room, not the drawing
A tape along each wall tells you how long the walls are. It tells you nothing about the angles between them, and the angles are what will bite you. Two things fix that.
Take the diagonals. In a room you believe is rectangular, measure corner to corner both ways. Equal diagonals mean square. Unequal means it is not, and the difference tells you how far out. This takes thirty seconds and is the single most useful measurement on a remodel.
Triangulate the corners you doubt. From the corner, mark a point a fixed distance along one wall and another along the second wall, then measure between the marks. Those three lengths define the angle exactly, and you can enter them straight into a drawing. For a corner you expect to be square, the 3-4-5 check is the quick version: 3 along one wall, 4 along the other, and the hypotenuse is 5 if the corner is true.
Write down what you measured, not what you assumed. A note saying "back wall 134°, not 135" is worth more than a tidy plan that is wrong. Pro100 will take the real number without complaint.
Drawing a room that is not rectangular
Walls in Pro100 are placed by length and angle, so a wall at 112° is no harder to draw than one at 90°. Chamfered corners, bays, alcoves, splayed returns and rooms that simply are not true all go in as measured. The angled walls feature page shows the tools; this is about using them well.
A few habits save rework:
- Close the outline before you start placing cabinetry. If the walls do not meet, the floor area is wrong and so is everything derived from it.
- Put the openings in early. Doors, windows and the swing of a room door change what can go where, particularly on the short wall created by an angle.
- Model the obstructions. Boxed-in pipework, a boiler, a meter cupboard. You can import 3D objects for appliances so clearances are checked against the real sizes rather than remembered ones.
- Use the Shape Editor for anything the wall tool will not do — a curved return, a stepped recess, a splayed island. The Shape Editor walkthrough covers the drawing itself.
Running cabinetry against a wall that is not at 90°
This is where an out-of-square room costs money, and it is a different problem from building an angled cabinet. The boxes are ordinary; it is the junction between the run and the wall that has to absorb the error.
- Put the adjustment where it can be adjusted. A scribe filler at the end of a run takes up several degrees invisibly. The same error spread across every carcass shows as uneven door gaps all the way along.
- Decide which wall is the reference. Cabinets want one straight datum. Pick the longest or most visible wall, run square to that, and let the angled wall take the filler.
- End panels need the angle, not a guess. A finished end against a splayed wall is a tapered panel. Model it and it appears on the cut list as a tapered part rather than a rectangle somebody has to trim on site.
- The countertop crosses the angle. Where a top runs from a square wall to an angled one, the back edge is not parallel to the front. Templating catches it; so does drawing it first.
- Toe kick and base trim mitre at the real angle — not 45° unless the wall happens to be at 90°.
If the corner itself is being filled with an angled unit rather than a filler, that is the cabinet problem, and angled and corner cabinets has the geometry and the calculators for it.
Trim, flooring and the things that run along the wall
Anything continuous has to turn the corner at whatever angle the room gives it. Crown molding mitres at half the corner angle, which is why a 135° corner needs 22.5° cuts and not 45° — the crown molding guide goes into the cuts. Baseboard behaves the same way. Flooring is worth setting in the model too, because a board direction that looks fine in a rectangle can run awkwardly across a splayed wall and it is cheaper to notice on screen.
What the client sees and what the shop gets
The reason to draw the room honestly is that everything downstream inherits it. A 3D render of a room drawn as a rectangle shows a kitchen that cannot be built; drawn as measured, the photorealistic view is something you can hand over with confidence, and panoramic views let the customer stand in the corner that worried them. High resolution images go in the quote.
On the shop side the same model produces the cut list with the tapered and filler parts included, the panel optimizer nesting them, the shop drawing with the real angles dimensioned, and job costing that prices the fillers and scribes instead of absorbing them. The cut list walkthrough shows the output in detail.
Where out-of-square rooms turn up
| Work | What the angle does to it |
|---|---|
| Kitchen remodeling | Settled framing and built-up plaster. The most common source of a corner that is a degree or two off. |
| Kitchen design | Bays, chamfered returns and galley ends that were never square. |
| Closet design | Under-stair and loft spaces, where almost nothing is at 90°. See also closet layouts. |
| Bathroom remodeling | Small rooms where a few millimetres of error leaves a vanity that will not go in. |
| Commercial shops and office fit-outs | Reception areas and partitioned spaces built to a plan that the building did not follow. |
| Interior design | Presenting a room as it is, so the client approves something that can actually be installed. |
The gallery has rooms of each kind, drawn and rendered in Pro100.
Common questions
How do I find the exact angle of a corner?
Triangulate it. Measure a fixed distance along each wall from the corner, then measure between those two marks. Three lengths define the angle with no protractor and no guesswork, and they are easy to take on your own. An angle finder is quicker if you have one, but it is only as good as the flatness of the two surfaces you rest it on — near a corner, that is often the problem.
Should I draw the room square and fix it later?
No. Everything after the walls depends on them: the floor area, the runs, the countertop, the quote. Fixing it later means redoing all of it, and the usual outcome is that it never gets fixed and the error is discovered on site.
How much out of square is worth worrying about?
If the diagonals of a room you expected to be rectangular differ by more than about a quarter of an inch, draw it as it is. Below that a scribe absorbs it. Above it, the gap will show at the end of a long run, because the error accumulates along the whole wall rather than staying where it started.
Does an angled wall mean I need angled cabinets?
Usually not. Ordinary boxes with a scribe filler handle a wall that is slightly off. Angled cabinets are for corners you are deliberately cutting across — that is a different job, and angled and corner cabinets covers it.
Can I work in millimetres for this?
Yes, and for out-of-square work many people prefer it. Pro100 works in inches or millimetres and you can switch without redrawing.
Where to go next
Beginner's guide · angled and corner cabinets · Angled cabinet features · Angled walls feature page · Tutorial videos · Full video list · Documentation · FAQ · Custom cabinetry · Door styles · Custom doors
Draw your next room as it really is
Take the diagonals, put the real angles in, and see the kitchen before you build it. An out-of-square room is the cheapest problem to solve on screen and the most expensive to solve on site.
Already decided? See pricing, or talk to us about your shop.