Thank you for the reply. I can tilt the window fine. How do I raise the window on the left to be even with the window on the right? I was told there are 3 adjustments. vertical, horizontal and in/out. How do I adjust so that the top left and top right are even? Jelovica is the manufacturer.

Tilt turns can be tricky to install correctly and yours looks like a new install from the pictures.

Has it been like this since the original install? If so that might be where I would look first. It could be you need to adjust or add an additional shim, that might be why the adjustment key isn't working for you.

I have never had to adjust mine in 14 years , but I was really careful when installing them to make sure they were plumb, level, and properly shimmed, especially on the bottom; critical for any window install, but doubly so for tilt turns.

I am assuming from your post that this is the allen screw that you used when attempting to adjust?

Thank you for your reply oberon476. Yes, this is a new home construction and I sourced my windows myself and now I have to deal with 4 windows that was improperly installed by the contractor and he won't honor his install warranty. I am trying to figure out how to adjust it. The house is still under construction so that is good part. I need to move up the window about 1/8 inch up so it is level with the other window on the right. I was told the 4mm allen key to adjust vertically that is located inside the bottom left hinge. The frustrating thing is, if I raise the window to the highest level - only the left side is raising up and the right side is slanted. I was told to shave off the window sill but that still aesthetically looks bad. I am hoping some else have seen this issue and can offer some ideas.

"now I have to deal with 4 windows that was improperly installed by the contractor"

How are they installed improperly? Are they plumb level and square all the way around? Maybe removing and reinstalling correctly is the answer?

shaving the window stool doesn't seem like much of a solution.

I agree with millworkman, you need to readdress with the installer.

Thank you millworkman for the comment. When I say "improperly installed" look at the picture I posted, the window is slanted on the left. I also put a level on the top inside of the trim and window sill there are all level. Is that what you mean by plumb level and square all the way? Can this be adjusted via vertical hinge adjustment?

No, if the unit is not perfectly plumb, level and square it must come out. Those adjustments are for very minor discrepancies over time from settling, humidity, etc, not improper installation. Remember a tilt & turn operates in more ways than every other window and it is imperative that they be installed plumb level and square. And just a note, you cannot check this using the trim this must be done on the frame itself.

millworkman - Thank you for your comment. I think I understand what you are saying. One of the three window is set lower that the other two, therefore the lower window needs to be re-installed correctly so the height of all three windows are plumb and even with each other. Is that accurate what I restated of your comments?

Are the windows in the picture that you posted installed as one complete unit consisting of three windows mulled together (the third window that you have mentioned appears to be to the right of the other two?), or are they three completely separate windows that were installed individually but share the same stool and trim?

oberon476 - thank you for the reply. Yes, it is 3 separate windows individually installed on the rough opening, left to right looking at the windows. Left window is the one with the slanting. Does that answer your question?

It does and it makes the fix much easier since only that window has to be pulled and reset in the RO versus a single unit of three mulled windows.

Now to get the installation contractor back to fix it.

Oberon476 - Thank you for the reply. Does anyone know an expert European window installer/repair in the Maryland DC area? Let me know. Thank you.

Where are you in the DC area?

Windows on Washington Ltd - Close to Clarskville in Howard county. I-70 to Route 32. Do you expertise in European windows?

I am not a "expert" in European operators, but I have adjusted the few that we have installed. I was trying to see if you were close by to where I could swing by and take a look as a courtesy. Unfortunately, you are a good hour and change from the office in this case. If you want to email me, I can see if I can swing by a day when I am maybe near your area.

Not sure if you completed the adjustment, but this may help:

https://catalog.siegenia.com/pdf_downloads/taf_tip_f_w_tung_en.pdf