Rubber roof bubbles or blisters

I went through this when my TT was new. Sadly it is normal but only because they don't take care when installing it. As I said it is indeed normal to have some small bubbles and like the dealer said, they will come and go and that has been exactly what happened. Don't believe me? Do what I did and call around to other dealers, even call the competition and tell them you have another brand and see what they say. Every single one told me it was normal and nothing to worry about - and 10 years later I can tell you they were right.