Hi Caroline. I assume you're thinking of a standard "sit on" worktop sink and drainer on top of a kitchen base cabinet. Why should you worry about a partition wall? The only worry I would have is if you are thinking of an under worktop sink such as a Butler or other heavy sink and you have to fix separately to a stud partition wall in which case there would be problems with the weight bearing capacity of the wall. Can you be more specific? diymostthings
Hiya, yes I was worried it would absorb the water, get wet. Is this something I don't need to worry about then?
As long as you tile around the wall ans use some sealent to keep and worktop/wall joins watertight, you should be OK.