I sealed my bath surround some 15 years ago by jamming tightly-rolled-up plastic bags down the gap between bath and wall, before using loads of silicone sealant to complete the seal. That all appeared to work wonderfully, but the other day I removed the bath's side panel - for the first time in about a year - in order to remove the drainage trap to unblock it, and found that the wooden frame supporting the bath at the head end was soaking wet and beginning to show signs of rot. I should also add that I'd had a power shower installed 3 years ago, which probably hastened the failure of the seal...
Clearly the seal needs renewing, but I wondered if there are any tips to make a really good, long-lasting seal? I should also add that the wall tiles continue down behind the sides of the bath by about an inch, if I remember correctly (can't see for sure without removing the old seal).
Thanks for any advice....