I need to build up the level of my concrete garage floor in the vicinity of
the door, to remove a small inwards slope which starts just outside the
garage. The added height will vary from about 35mm to a feather edge. This
is to minimise water running past the seal on the door. The options I can
think of a

1. Use concrete / mortar (+PVA?) to raise the level of the concrete (I am
aware this will probably be too thin and may crack)

2. Use epoxy mortar (very expensive even for small quantities)

3. Floor levelling compound used dryish so that it doesn't level (probably
only intended for internal use).

4. Break up some of the existing concrete so the new concrete is reasonable
thick. (more work).

Does anyone have any comments - I am seeking a reasonable, but not perfect
result.

James