ᐅ How to Secure an Ikea Cabinet to a Wall with Uneven Surfaces?

Hello,
I bought a Metod tall cabinet and have already assembled it. After leveling it against the wall, I noticed that the wall is extremely uneven, leaving about 4 cm (1.5 inches) of gap at the top.

Now I am wondering how I should secure it to the wall.

Another issue is coming up, as I want to install wall cabinets next to this cabinet, and the same problem will likely occur there as well.

Best regards

Is the cabinet aligned vertically using a spirit level, or what exactly is meant by "aligned on the wall"?

Oops, yes. Of course, with the spirit level.

You can consider yourself lucky that the slope inclines upward toward the back left; if it were slanting forward, the glasses would fall out of the cabinet.

For example, if you want to mount an 80cm (31.5 inches) wall cabinet and there is already a 1cm (0.4 inches) slope within those 80cm, you could attach a 1cm (0.4 inches) thick wooden strip under the metal rail. You can then use the same anchor holes with appropriately longer screws.
This strip will cover the gap:

Just an idea.
Best regards, robi_aus_ffm

You can actually consider yourself lucky that the slope goes upwards to the back left; if it sloped forward, the glasses would fall out of the cabinet.
For example, if you want to install an 80cm (31.5 inches) wall cabinet and there is already a 1cm (0.4 inches) slope within those 80cm, you could attach a 1cm (0.4 inches) thick wooden strip under the metal rail. You can use the same dowel holes with correspondingly longer screws.

This strip covers the gap.
Just an idea.
Best regards, robi

Strictly speaking, that would be better, then I wouldn’t have any problems fixing it at the top and could have the spacing at the bottom instead.

I would suggest using the white cover strip since you have a white cabinet frame:

You will probably need to secure the cabinet with an angle bracket that has a sufficiently long arm (tip-over protection). You should visit a hardware store for this. You might even need to install two brackets at the top to prevent the frame from twisting (which can happen with just one bracket), as this could cause the screw to pull out.