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Bifold Door Glass Replacement Cost Bifold doors are a great option for bringing more natural light to your home or business. They can help create a seamless connection between your indoor and outdoor spaces, and also help you save money on energy costs. The doors are usually made of toughened safety glasses and can also be made of laminated glass. This glass is safer to break since it is not prone to shattering into dangerous pieces. Frosted and textured glass can also provide security.