Did they made the top using concrete and Rebar? Concrete as in Cement + small rock + sand, (not only cement +sand only) How thick is the concrete top? If its 3", and if you have rebar the strength should be good, the contractor will need to cut out minimal 1.5" out, make sure surface is rough and add in new cement, Don't forget you have tile, if you are using floor tiles is very strong too. If you are worry, on the side of the new cement, made a wood surrounding it, with 4 wood leg.

Silicon is ok, my dry kitchen water tap opening is much bigger, and the base is wood. Seal ok.

For me, When I got the sink and hob for wet kitchen, i made the cutout fitting myself using styrofoam. Much easier, sometime if they give indo worker do, many just don't give a dam

This post has been edited by weikee: Nov 28 2011, 08:06 AM

When he hack you, you should see if its only sand and cement, or with rock.

Haha.. sorry for the mistake. Surfing and cleaning house can't come together