Built to keep you safe.

At Napco^® Window Systems, we understand that a big part of feeling at home is feeling safe. It's why making our replacement windows and patio doors the most secure you can buy has always been a top priority.

Added protection for patio doors

3500 Premium Sliding Patio Doors come standard with a single point lock, or for added peace of mind choose the optimum security of the optional footbolt lock.