Kitchens – How to install Kitchen Cabinets on a Drywall

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I have 2 Kitchen cabinets, each 50 CM on 80 CM, they weigh about 10 KG (maybe more? not sure).
I wanted to hang them on the wall but just discovered it's a drywall, and seems pretty thin.
It is a 120 CM wide niche that I have in my kitchen (like an inward gap),
on the left side there's a concrete wall, but on the right once again drywall.
I've heard something about a Rail that might support them (attaching it to the concrete), but I'm not sure how relevant it is when the other side is also drywall.
Any ideas?
These cabinets are suppose to be above a Sink, so I can't think of many alternatives for them, ideas in that direction would help as well.

Best Answer

When installing cabinets, the "go-to" method is to "hang" them on a rail that you install first. The idea is that the rail, being much lighter and less bulky, is easier to put in place, get level, and then screw into the studs. Sometimes it's just one rail, sometimes two; depends on the cabinet system. The rail should be securely screwed into every stud along its length, to provide a solid anchor for the cabinet's weight.

Then, the cabinets will have a complimenting hanger hardware that will allow the cabinet to hang on the rail(s). That's enough to support the weight of the cabinets and what they hold, but you should still secure the cabinets to the rail, and thus to the wall, with screws through the backing and/or the back edge of the cabinet side panels. Again, how this works depends on the cabinet system; most cabinets have a pretty flimsy backing, but pre-drilled holes to put screws into the rails behind. Then, you put some trim around the back to hide any gap caused by the rail hardware, and you're done.