Careful measurement, adequate shimming, and secure fastening are key to a high-quality, professional-looking cabinet installation. Repair any damage to the walls before installing the base cabinets against them. Typically, base cabinets only need to be attached to the wall to secure them in position. The weight of the cabinets all connected together and at the wall, in addition to the countertop, will act to keep the cabinet assembly in place. Another issue that comes to mind is how secure does the toe base need to be? It sounds like you’re installing cabinets with no toe-kick notch.
NOTE:When installing a blind wall cabinet, make sure the cabinet is pulled out from the wall the appropriate distance as called for in your kitchen plan. The job I’m starting calls for the base cabinets in the Masterbath to hang from the wall about 8 above the floor. Should I just lag it to studs like the countertop guy said? I thought about removing drywall and adding blocking so I can secure it in the studs and half way in between each stud. For anyone considering Installing IKEA kitchen cabinets themselves, I offer the following advice. I used a mixture of cabinet screws and hollow wall anchors to secure the rail to the wall, hitting as many studs as possible. I am not sure how you anchored it but you can use 2 4 base and shim the cabinets level and that way you can secure the base to the floor and the cabinets to the base.
Installing wall cabinets without a soffit. Measure up from the base-level-reference line 54 inches. Place a mark on the wall and with a level and straight edge continue around the room drawing a line parallel to the base-level line (previously found by locating the high spot on the floor).