The house is 25 years old, located in South Wales, UK. Previous owners made a total mess of the attic space, taking up rolled insulation all over the place to cut holes for suspect plumbing but that's another story. I'm replacing the rolled insulation but I'm unclear whether to insulate under the cold water tanks?
I cannot tell if the house originally had insulation under the tank, there are bits stuffed under there which could be the remains of the original insulation or just where previous owners put stuff out the way. The tank is elevated slightly, about 450mm above the ceiling below and has it's own insulation on the top and sides.
There are two uninsulated pipes running under the tank which I believe arent original and are part of the suspect plumbing (surely all pipes in loft should be insulated?). As part of the project I am also attaching insulation to these pipes but may struggle to reach the full length under the tank, potentially leaving some small parts exposed.