Gap between bottom of door frame and floor

[diy_dragon]

We recently had a flood which damaged a solid oak floor running the whole length of our 40ft long hall. The oak floor has been has been removed leaving the concrete floor but all the door frames had been cut short to allow the wood floor to be positioned underneath, so now there is a 25mm gap between the bottom of the door frame and the concrete floor. Paranoid about future floods we want to put Karndean down rather than wood but we will be left with a 20mm gap under the door frames. Does anyone have any ideas how we could proceed.

[stoneyboy]

diy_dragon,
I'm not sure that a karndean floor will fare any better in a flood situation - check with the manufacturer.
Either fit a threshold in each doorway or fit a timber fillet to the bottom of the doors.
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