If you want to replace your old Caravan access door then you need certified professionals as it is not an easy task. There are some steps like first removing the caravan door, then removing the decorative finish, unscrewing the inner door frame, cutting through the glue, removing the door frame, and taking measurements. For more information visit: https://caravanpartsandaccessories.wordpress.com/2022/06/08/tips-for-replacing-a-caravan-door/