Welcome to our forum.
I see - So the problem is Chlorine, bromine and other chemicals ....in this case maybe it is easier to change wrapping water barrier every 2 years to prevent the issue?Visual wearing problem is obvious but not that critical.Just found hard cover but looks like not all spa brands offer them ...
Тhank to all for info! Very clear But I still have an idea ...If we take 2 pieces of hard plastic of size of a cover and insert them into the cover (top and bottom) ...Will in dramatically increase the livetime of a cover ?It should prevent direct water movement into a cover ...Sure will not prevent people from breaking a cover physically .. but it is an exception ...9 years sounds good to me but some ads suggest to change it every 2-3 years!! It is ridiculous ...
Ok - I see the point. Agree - 6 years is Ok too.Just wonder why manufactures do not do that (hard plastic inside) at their end. It should not cost too much.Never mind - let it be the way it is now. I just like to enhance things if I see a way
Like this ? : )https://hardcoverhottubs.com/or this https://hottubwarehouse.com/blogs/posts/what-should-i-look-for-in-a-spa-coverbut looks like the second one has no isulationHow about using Thermal blanket ? Like this : https://www.diypartcenter.com/products/hot-tub-thermal-blanket-miscellaneous-7ft-x-7ft-5235it should increase live span of main cover - Am I wrong?