Experience, Customer Service and Flexibility are the hallmarks of JB Sash. We have been leaders in the window and door business for 80 years. Our professional staff is highly knowledgeable and trained to help you find the right products for any project. We offer an extensive range of services including shop drawings, custom carpentry, delivery and installation. In addition to an onsite manufacturing facility and warehouse, our convenient Chelsea location features a beautiful showroom which is open to the public. No matter what you’re looking for, JB Sash can either order it or make it… to your specifications.