Simple, made to order folding doors from FINDOOR. They have no chains, springs or bulky rails and with less moving parts they are virtually maintenance free. They have multiple configurations with sizes up to 55' wide and 35' tall. They require very little headroom so you can maximize the size of the door in your building. Man doors and windows can easily be included in the door panels. Installation is included and pricing is often more competitive for medium to large size doors than conventional doors. Call for more information. If you'd prefer email, please include your name and a phone number, Thanks!