Finished floor level fixed before anything is measured from it
Why — act while you have leverage
Every height in the room — worktop, socket, shutter — is measured from the finished floor. Fix it after measuring and every one of them moves.
What to look at
- A datum line marked on the walls, in every room
- The floor build-up thickness confirmed with the flooring actually chosen
- Heights on drawings stated from finished floor, not from slab
How to check it yourself
The finished floor level accounts for the screed (the levelling layer under a floor finish) and the tile or wood on top of it, not the bare slab. Mark a reference line on the wall at a fixed height above it and work from that line for the rest of the job. If flooring has not been chosen yet, that choice is now blocking the interior.
Where this comes from: Established trade practice; IS 1200 for measurement conventions (established trade practice)
More site setup and marking-out checks
- Photograph before this is covered
- Marked-out sizes checked against the real room, not the drawing