Cork, 2-in-1 or something else? What are the advantages/disadvantages of each? Also, are these types of floors okay for installation in a kitchen?All installation is at or above grade. 30 year-old home with concrete slab.
I would strongly suggest that you use the same manufacturer's underlayment. most of them come with attached moisture barrier (or thicker plastic). If not, make sure you install one first since you are installing on concrete slab. I have installed laminate wood on kitchen floors. but I personally prefer tiles in the kitchen, most durable, applicable, and appropriate kind of flooring for kitchen which is subject to extensive use and water contact. If you don't have kids in the house and not too many people, it's alright. I would recommend laminate wood though, very durable and easy to install. good luck!
Whatever cementious product you use , make sure it's NOT a wearing surface underlayment product, it could interfere with any glue or mastic needed to adhere the floor.
I personally put down a hardwood Pergo floor in my kitchen and so long as you allow gaps along the outer edges for expansion and covered with molding no problems. The floor is holding up to moisture and wear of the kitchen just fine. I think a cork underlayment isn't as good as a sheet of foam insulation as it absorbs water and can swell causing problems in a kitchen floor installation. You should talk to the retailer that you are purchasing the flooring from regarding an additional plastic sheet due to overlaying on top of concrete.
