There are many ways of insulation you can provide your shed with. The solution depends on your time and budget.
Bubble Wrap Insulation
Consists of bubble core reflective insulation products made with an extruded encased air (bubble) core laminated to two layers of high performance, tear resistant, reflective woven aluminium foil.
It is one of the simplest and easiest ways of insulation. It is available and is quite affordable. It is an Australian made product and is common purpose reflective foil insulation, vapour barrier and radiant thermal barrier that are suitable for garden sheds, industrial sheds and steel frame structures. It can be attached to wall panels and roofing with the help of a staple gun or a hammer and nails. It works by seizing heat through the air bubbles. Bubble Insulation such as Sancell 310 AGX is recommended to use for outdoor sheds in Melbourne.
This type of insulation is a bit more costly, but it provides more insulation than a bubble wrap. If you are going to use this type, you will have to acquire rolls of glass fibre wool which is available at any DIY or hardware store. Note: Fibre wool has tiny glass pieces which can injure you, so it’s important to be careful and wear protective clothes and face-mask. One of the easiest ways of attaching fibre wool to the wall is to use the plywood or MDF sheet as an additional wall and put the fibre wool between to retain heat.
Windows and Doors Insulation
This type of insulation is quite important during the cold season, as the flow of air can easily come into your shed through the frames, even if the gap is too small. You can use some glazing film to prevent heat from escaping.