Fiberglass batts are the cheapest insulation materials available. However, a loose corner or a small tear can impede insulation quality.

Batt, or roll, insulation is one of the most inexpensive types of home insulation and one of the easiest to install, especially for DIYers.

If you're wondering whether your home would benefit from thermal insulation batts, then the answer is in all likelihood 'Yes'. R5. 0 insulation is a fairly safe and economical recommendation for all but the most extreme climates in Australia.

​​Foam boards Easy to install and relatively inexpensive, foam boards are another insulating option. They are usually made of polyurethane, polystyrene, or polyisocyanurate. Sheets of foam can be cut to fit tightly between wall studs or attic ceiling joints.