Room Clear Height
PremiumCalculate slab-to-slab clear height for rooms and write results to a parameter. · Explore the live interface below - every control works exactly as it does inside Revit®.
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Four simple steps to bring Room Clear Height directly into your Revit® environment.
1
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2
Download Installer
One installer, 52 professional Revit® tools. Under 15 MB.
3
Open Revit
Room Clear Height appears in your ribbon automatically - ready to use.
4
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Why Room Clear Height exists
Clear height is the number that decides whether a room passes. It is also the number Revit does not hold - the room has a height parameter, but slab-to-slab clearance means knowing which floor is above this room and how thick it is. So it gets measured by section, room by room, and written into a parameter by hand.
How Room Clear Height works
Pick the rooms you want from a level-grouped list and run the scan.
For each room the tool spatially matches the floor above it and computes the slab-to-slab clear height, showing the Revit height, the upper level, the level-to-level distance, the slab thickness, the raw height and the difference between them.
Where no floor sits above the room it falls back - first to the nearest level that carries floors, then to any level above the room base - and marks that row "(no floor)" so you can tell a level-derived figure from a measured one.
Differences are colour-coded, so a room that disagrees with its level-to-level assumption stands out.
Two other modes cover related measurements - opening areas and wall heights - from the same dialog.
Write the result to an existing parameter or create a new one, and export to CSV for a compliance record.
Before
Clear heights are measured off sections one room at a time and typed in, with no record of how each figure was derived.
After
Every room has a computed clear height with the working shown, and the delta column tells you where the assumption and the model disagree.
When to reach for it
- Habitable-room height compliance checks against a building code.
- Coordination where equipment or ductwork needs a guaranteed clear dimension.
- Producing a clear-height record for a design review or a planning submission.
What it does not do
- A floor above the room gives the best answer, but it is not strictly required. Where there is none the tool falls back to the nearest floor-bearing level and then to any level above the room base, marking those rows so you can see the figure was inferred rather than measured to a slab.
- Floors less than 1.5 metres above the room base are never matched. That guard stops a plinth or a stair landing being read as the slab above - but it also means a genuinely low void gets no match at all.
- The match is spatial. An unusual floor arrangement above a room can produce a figure worth verifying, which is what the delta column is for.
- It measures and writes a parameter. It does not judge compliance against a specific code - the threshold is yours.
- Rooms must be placed. Only the clear-height mode needs an enclosed boundary; the opening-area and wall-height modes do not.
Questions
- How do I calculate slab-to-slab clear height in Revit?
- Revit gives you room height and level elevations, but not the clearance between the top of one slab and the underside of the one above. This matches the floor above each room, accounts for its thickness, and reports the resulting clear height.
- What does the delta column mean?
- The difference between the computed clear height and what the room or the level spacing implies. A large delta usually means an assumption somewhere is wrong, which is exactly what you want flagged.
- Can the result be scheduled?
- Yes - write it to an existing parameter or have the tool create one, and it schedules and tags like any other room data.