Experience is the main reason why Frank Door consistently gives its customers the smooth-working, long-lasting cold storage doors they need. A family owned and operated company, our roots in the business began over 25 years ago. The application and product design knowledge that we gained during that time is an important part of what separates us from other cold storage door manufacturers. We manufacture doors that fit, function and last in virtually any type of application. Of course, there are some standard sizes and configurations but all our doors are built to specific requirements. Your requirements.