We recommend using a cold water tank insulating kit, especially if you have previously fitted a high level of insulation with no success. The insulated panels generally come as two pieces; one long piece to pass around the water tank and another smaller piece which covers the lid.
Wear protective gloves, eyewear and a dust mask. Fibreglass insulation can cause respiratory and skin irritation so it is important to try and avoid disturbing the insulation as much as possible.
Lay a board down over the insulation so you can kneel down comfortably beside your work area.