Originally posted on Double Glazing Cost Calculator NZ by Superior Renovations ® Superior Renovations - Auckland’s Trusted Home Renovation Specialists This blog and calculator has been updated with added information for the year 2026. If you’re looking for ways to insulate your home, double glazed windows and doors are a great investment. With double glazing, you can expect to reduce heat loss and improve the energy efficiency of your home. This will help you save money on heating and cooling costs, as well as create a healthier environment by preventing the build-up of mould. When it comes to insulating your home, there are four main areas to focus on: ceilings, walls, floors, and windows. Single glazed windows have been used for centuries, but they aren’t the most efficient option available. Double glazing is a superior choice, as it provides an additional layer of insulation that can significantly reduce heat loss. Take me straight to Double Glazing Cost Calculator...