Revisions log for Answer #1235

And the sun and rain and moisture and temperature fluctuations and wind walking between the battens did their job.

I'm also inclined that this is because of the economy of installation.

Well, even with a glimpse, judging by the photo, it is clear that the seams are not foamed, polyurethane bent and crooked, the only good thing is that the clinker holds firmly and still does not fall on someone's head.