Trying to decide on which flooring to go for but confused by choice. I'd prefer something that's not too thick. Lots seem to have a 4mm layer but I'm not sure if this is thick enough in a kitchen dining area. Will I require underlay if it goes on a concrete floor? All help appreciated!
If your going for engineered herringbone you will have to fully adhere directly it to the subfloor which will probably require a levelling compound as the floor must be perfectly flat. 4mm wear layer is plenty. Herring bone flooring fitting is a job for a professional who knows what they are doing.