Ameribuild is a company located in New Zealand that specializes in supplying double-glazed windows and doors across the country. Their primary product is uPVC (unplasticized polyvinyl chloride) joinery, which is known for its exceptional insulation compared to standard aluminum joinery. They highlight the benefits of uPVC, such as its power efficiency-- being 26% more energy-efficient than the New Zealand building code requirements-- and its affordability, claiming to use more affordable remedies than thermally damaged aluminum alternatives.