I've read on this forum about vinyl liner thickness being 20-28 mm. Looking at the top part of the liner in my pool (i'm currently in the process of putting some of it back into tracks), the thickness is only about 4 mm! I can't really imagine vinyl liner being 20 or 28 mm! 28 mm is more then an inch thick! A wrinkle on the bottom of my pool also confirms that the actual vinyl part is much thinner than 20-28mm.
Which makes me believe that it must be the actual liner and possibly padding behind that should make up to 20-28 mm. Am I right? Or do I have somehow a liner that 5 times thinner than anybody else's?