One of our bathroom toilet tanks 'sweats' badly at this time of year - the outside of the tank is covered in condensation and it puddles on the floor beneath. I was thinking of retro-fitting some insulation to the inside of the tank (I don't want to mess with adding a warm-water feed, and the tank's a nice old decorative one, so I'd rather not replace it with a modern one that has a double wall or built-in insulation)
Questions:
1) how thick does the insulation need to be? Is 1/4" probably enough? (that's perhaps something of a "how long is a piece of string" question; I think I'm dealing with a max temperature differential between water and air of 35 degrees)2) What adhesive to use? Needs to be water-resistant, obviously, but also something that's suitable for styrofoam and won't destroy it...
(alternately, I could just buy a kit, I suppose - they seem to be about $30 online. Not sure if HD etc. carry them...)
cheers
Jules