Roof or Ceiling insulation
If your property has a roof with attic space then Roof insulation is the first thing you should look at, particularly since an estimated 40% of the heat in your home is lost through the Roof or Ceiling space.
Roof insulation is cheap to buy, easy to install (you can even do it yourself) and can save you serious amounts of money over the years.
Even if you already have roof insulation in place it may be worth checking whether you have the recommended levels installed. The recommended minimum depth for insulation is approximately 140mm – 180mm depending on where in New Zealand you live. It also needs to fit snugly between the timber framing and over the top to give the best result. If your roof insulation was installed more than 15 years ago there’s a good chance, it’s less than what’s required and may need a top up.