Can you install a pool liner over an old one?

Honestly, the best thing to do is call your local pool store and have them send someone to do it. It's fairly tricky to do, and it really easy to tear the liner during install. Also, the temperature outside has to be just right. If it's too cold, the liner will crack and tear very easily. If it's too hot, the liner will over-stretch. You can go to www.backyardescape.com to find a pool store in your area. They seem to be the best place. The site is put together by the biggest pool companies in the country, and all the stores that buy from them are listed, so it seems to be the most comprehensive list I've found yet. Good luck! Maybe this will help, but it is a lot of work and things could go wrong. Installation instructions are available at instheswim.com. These instructions seem to be a bit simplistic, but who am I to criticize. It probably would be good to consult a pool shop professional if you can. When I installed my liner I did not follow these instructions. Anyway, to locate the instructions, go to the main page at intheswim.com. Click on the category