Waterproofing

[Flyboy]

Hi all,
Building a new house and underneath the house we've got a workshop roughly 20m2 in area. The workshop floor is a concrete slab at ground level (rest of the house is elevated). In one corner of the workshop we're going to put the washing machine. I was intending to leave the floor as it is, but the certifier is saying that because of the washing machine the room is now classed as a laundry and will have to be waterproofed and tiled:mad:. I really, really don't want to do this as apart from the cost I reckon it would be a week maximum before I dropped a hammer/cold chisel etc on the tiles.

Does anyone know what the relevant code for waterproofing requirements is (in NSW)? If it is required in this case, why isn't the kitchen (which has more taps and pipes) also waterproofed? Also, is there another way I can workaround the waterproofing, such as overflows?

Cheers

[silentC]

Just put a wall around the washing machine, call it a laundry, and waterproof that.