Mist, cracks in the USB

Hello guys,

I noticed today that there are 2 cracks (about 10 cm) in the USB (Braas Divoroll). How can I make the sheet watertight again :confused:

So you could seal it with diffusion-tight adhesive tape, but if I were you, I would first clarify the cause of the cracks, so you don’t get more?

Well, the cause of the crack probably lies with the construction, it must have happened by accident. The problem is that I only noticed it once the roof tiles were on, now I could at most glue it from the inside.

Yes, this is now a bit fiddly because you can’t reach it properly anymore, there is this S... tape, I’ve forgotten the name, with that you should be able to seal it permanently.