Floors
Floors are sketch-based elements: you draw a closed boundary and Revit builds the slab with its layers. Learn to create floors, openings and simple falls.
In this lesson you will
- Create floors in sketch mode
- Choose and edit floor types
- Add openings and edit boundaries
- Create falls with slope arrows
Sketch mode
Many Revit elements — floors, roofs, ceilings, openings — are created in sketch mode. You draw magenta boundary lines that must form closed loops, then click the green tick (Finish Edit Mode). Inner loops become holes. If Revit reports an error, a loop is open or lines overlap.
Creating a floor
- 1Open the floor plan for the level. Architecture › Floor.
- 2Choose the floor type.
- 3Use Pick Walls and click the external walls — the boundary follows them. Set Extend into wall (to core) on the Options Bar to run the slab under the finishes.
- 4Check the loop is closed (trim corners with TR).
- 5Finish Edit Mode. Answer the prompts about attaching walls sensibly.
Floor types
Like walls, floors have a layer structure (Edit Type › Structure): e.g. 20 tile, 30 screed, 200 concrete. The floor's top sits at the level plus its Height Offset From Level, and its layers build downwards. Model structural slabs and finishes together or separately depending on the project.
Openings and edits
Select a floor › Edit Boundary to change its shape. For stairs and service risers, use Architecture › Shaft (cuts through several floors at once) or By Face openings.
Falls
For a sloping floor (a ramp or a fall to a drain), add a Slope Arrow in sketch mode and set its height at tail and head, or give a boundary line a slope. For multiple falls, Modify Sub Elements can add points and ridges to a floor's top surface.
Quick reference
| Command / tool | How to start it | What it does |
|---|---|---|
| Floor | Architecture tab | Creates floors (sketch) |
| Pick Walls | Draw panel in sketch | Boundary from walls |
| Shaft | Architecture › Opening | Opening through several floors |
| Finish Edit Mode | Green tick | Completes a sketch |
Common mistakes
‘Lines must be in closed loops’ error.
Trim corners and delete overlapping or duplicate sketch lines.
Floor appears too high or low.
Check Height Offset From Level and remember layers build downward.
Exercise
Ground and first floors
- Create a floor type: 20 finish + 150 slab.
- Create the ground floor by picking the external walls.
- Create the first floor on level First the same way.
- Cut a 1000 × 3000 stair opening through the first floor with a Shaft.
- Add a small balcony floor with a 1:100 fall using a slope arrow.
You should end up with: Two floors with a stair opening and a sloping balcony.
Checklist
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Lesson quiz
Floor sketches must be closed loops.
Finished this lesson?
Taking the quiz marks it complete too. Your course page picks up where you stopped.
Free KitWren tools that help
- Area ConverterConvert square metres, square feet, acres, hectares and more.
- Length ConverterConvert between metres, centimetres, millimetres, kilometres, inches, feet, yards and miles.
- Concrete CalculatorCalculate the concrete needed for slabs, footings and post holes in cubic metres, yards and bags.
- Flooring CalculatorCalculate how much flooring, timber, laminate or carpet to buy, including waste and boxes.
- Merge PDFCombine multiple PDFs into one file, in any order, choosing which pages to include from each.
- Image CompressorCompress JPG, PNG and WebP images to make them much smaller — with a before/after preview and the size saved.
Free, independent learning material written for KitWren. Revit is a registered trademark of Autodesk, Inc. KitWren is not affiliated with, sponsored or endorsed by Autodesk. We never provide software downloads, licence keys or cracks — use the official sources.