A last year suspended very close to the balcony tits nest box, unfortunately brought no remedy; the birds prefer to continue crawling the roof instead of in the box.
This year, I have now tried here with the black plastic ravens and connect it to the balcony railings. Shortly after suddenly sat a tit on the other side of the railing (closer they dared not approach), beat crazy wings and beeped wildly. Apparently they wanted to defend their territory. But the raven was obviously sitting ;-)
Now, after about 14 days the birds were have now no longer be looking since then, and I will not finally awakened by pecking under the roof. Hopefully it stays that way!
*****
Supplement a few weeks later: It really is so, the titmice do not come back again. The plastic raven is really a very inexpensive and simple solution to the problem, I would not have thought!
*****
2. Supplement two months later: In my tits have disappeared today, really. I would have no reason to exaggerate here, and had nothing to do with the seller. Apparently it does not always work, as you can see in some other reviews. In part (like mine) but discourages the raven perfectly. That is probably also depend on the area to be protected against birds. For me, the raven in a radius of about 3-4 m acts on the balcony. For larger terraces that should naturally be more difficult.