Bifold doors, also known birli folding or concertina doors, are folded in sections or panels, usually in two sections (although some with more sections are still called bi-folds). One of their other names is the concertina door because it resembles the instrument.Colonial doors are largely symmetrical and come in pairs, with one or several recessed

To know the origin of the pivot door we must travel a long way back in time. To ancient Persepolis to be exact. Here, various pivot doors were used, and later found, in the Gate of All Nations.Choose from right hand inswing, right hand outswing, left hand outswing, or left hand inswing pivot doors to match your project's specifications.US Door & Mo