Whilst we can provide a completely flush track for our bifold doors we wouldn't typically recommend it. With a flush track there is no seal between the bottom of the doors and the track itself so there is no weather rating on the doors - making them suitable only for internal use or for very sheltered urban locations. For those seeking a flush connection between inside and out our low-threshold track features just a 14mm upstand against which the doors seal when shut - combining protection from drafts and the much sought after appearance. For more information on choosing the right track for your doors check out our blog.