How to Check Floor Flatness to DIN 18202 in AutoCAD from a Point Cloud

Why floor flatness matters — and why checking it is a pain

Flat floors are critical for warehouses, production halls, and any building with racking, machinery, or seamless finishes. In much of Europe, floor flatness and levelness are judged against DIN 18202, the German standard for dimensional tolerances in building construction. The problem is measuring it: the traditional straightedge-and-wedge method is slow, only samples a few spots, and rarely gives you a full picture of where the floor is out of tolerance.

If you already capture the floor with a laser scanner, you have far more data than any manual method — you just need a fast way to turn that point cloud into a DIN 18202 assessment. This guide shows how to do exactly that inside AutoCAD with the 3D Solution Floor Analysis module.

What DIN 18202 actually checks

DIN 18202 defines maximum permissible height deviations measured over set distances between two points — for example over 0.1 m, 1 m, 4 m, 10 m, and 15 m. Larger allowed deviations apply over longer distances, and different tolerance rows apply depending on the required floor quality. In practice, you need to know whether the deviation between any two points on the floor stays within the limit for that spacing, across the whole surface.

Step 1 — Load your floor scan into AutoCAD

Load your floor scan as a point file — the module reads PTS, XYZ, TXT, and CSV. You stay inside AutoCAD the whole time, with no separate program to open.

Step 2 — Run the DIN 18202 analysis

Point the module at the floor area and it evaluates deviations across the standard measurement distances (rows 1–4) and determines which quality level the floor meets. Edge-exclusion lets you ignore zones near walls and columns that shouldn’t count toward the assessment, so your result reflects the usable floor only.

Step 3 — See the problem areas as a heatmap

Instead of a table of numbers, the deviation heatmap paints the floor directly in AutoCAD model space: high spots, low spots, and out-of-tolerance zones are immediately visible with color-coded gradients. It’s the fastest way to show a contractor exactly where the floor needs grinding or filling — no specialist software required to view it.

Step 4 — Generate a compliance report

With a single command you produce a complete report: choose HTML for quick sharing or a Word document (DOCX) for a formal client deliverable. The report includes the compliance summary, statistical breakdown, heatmap, and the underlying measurement data — ready to attach to your project documentation.

Built to stay stable on big floor scans

Floor scans are large, and heavyweight plugins often slow down or crash on datasets like these. The Floor Analysis module keeps things light by orchestrating AutoCAD’s own commands and adding only the calculations it needs — so it stays fast and stable even on large floors.

ASTM E1155 (FF/FL numbers) and TR34 4th Edition analysis are coming soon, so the same workflow will cover international floor standards too.

Prefer to watch? See the instruction video

The DIN 18202 workflow is also demonstrated in the instruction video on the Floor Analysis module page — a quick way to see the analysis and reporting in action.

Watch the Floor Analysis instruction video →

Try it on your own floor scan

The quickest way to see the difference is on your own data. Download the free 30-day trial and run a DIN 18202 check on your next floor scan in minutes.

See the Floor Analysis module →  |  View pricing and start your free trial →