INSULATING TANKS AND PIPES
The best place to start this insulation project is the loft.
Cold water tank: Make sure the pipe joints are in good order. If the ball valve needs changing (or its washer), now’s the time to do it. Check that the overflow works as it should. And finally, if your tank doesn’t already have a cover, make one from chip-board cut to size.
Take some blanket insulation and lay pieces over the top of the tank so that they overhang the sides. Then wrap more pieces right round all four sides of the tank, enclosing the top over-hangs and overlapping at the join. Secure with string. The ‘cover’ should go to the floor but not under the tank.
Alternatively, build a light-weight structure around the tank with plywood and battens and then fill the space between box and tank with loosefill.
A third method is one which allows easiest access to the tank later and it’s also the simplest. Using block polystyrene of the correct size, build a container closely round the cistern. Hold the corner joints with plastic adhesive tape.
Pipes: Lagging these with pipe wrap is probably the cheapest way of doing the job. Just wrap the felt like material allowing a good overlap. Secure this with fine wire twists.
An alternative method is easier, but more costly. Buy purpose made sections of flex-ible foam plastic tube with a slit along one side for fitting over the pipe . Tape at intervals to secure the edges together and also tape the joins.