I don't know any brand names so I started having a bit of a look at what's needed. The cheapest and most efficient insulation is the horrible fibreglass. I've done enough mucking around with that to know that I really don't enjoy it.Do you know what this insulation is called? I’m concerned it’s made of that horrible stuff fiberglass that has little tiny splinters that are painful.
You can get the fibreglass in a blanket form with foil on one side, which I suspect is what was originally used. You can also get foam rubber insulation with foil on one side, more expensive and less efficient but nicer to work with.
The fine wire mesh that we put on windows and doors to keep insects out. These days it's usually plastic but you can still get the wire stuff if you look for it.What is fly wire? Google says it’s an online payment system.![]()
For these things I recommend going to a proper tradie's building supplies outlet rather than a regular suburban hardware place like Home Depot. You'll find what you need more readily and pay half the price.
I recommended you get someone else to do it because of the combination of cramped and dirty working space and unpleasant working materials as well as the filth that will be on the ground from all the mice. A breathing mask will be required and it's going to be hot sweaty work. At least it's cooler there this time of year though.