How big is opening for bifold closet doors?

Most folding doors are 80 inches tall. The width varies depending on the available space, but openings are usually graduated in increments of 24 inches to 72 inches or more. Generally, the rugged opening of the folding door should be 2 inches wider and 2 inches taller than the door itself, regardless of the size of the folding door. Origin folding door panels have a minimum width of 28 inches (even number of doors) and 15.75 inches (odd number of doors).

The most popular rough opening size is 49 by 82 inches. Custom doors are available for larger openings. For example, a set of folding doors four feet wide (48) by six feet eight inches high (80) would require an approximate opening width of 50 inches and a height of 82 inches. If the folding door is to be installed in an opening wrapped with sheet metal, the approximate width of the opening should be adjusted to the actual width of the folding doors (48 in the case of this example).

You should always consult with the manufacturer or product specifications to confirm the approximate opening requirements of your particular folding doors. If you have ordered a folding door and find that it is a little too long for the height of the door, it is very simple to trim the door to fit. The recommended minimum width for folding doors is 1400 mm (4.7 ft), however, this is the minimum width for a folding door assembly with 2 door panels. Note that most folding door assemblies don't come with a door frame kit, so it's quite common to use selected ¾ thick wood to create the finished door frame.

Origin has a folding door sizing calculator that details the manufacturer's standard maximum width for folding door panels, which is 420 to 780 inches, or 35 to 65 feet. Folding ones are sold in pairs, with two doors that fold on one side or four parts in the middle with two doors that fold back on both sides. It should be obvious from the above that adapting a folding fold to another style of door opening can be a problem. Note that these guidelines for a finished opening for a folding door are typical framing standards employed in the home building business.

Your interest in “folding door sizes” is likely related to a closet door repair or replacement project. They are often found at the back of homes to allow expansive views of outdoor landscapes and are also used indoors for pantries, closets, and other small spaces, so you'll need to know the size of the end opening for folding doors. Finished opening for folding doors involves attaching 1″ x N trim boards to the rugged opening 2×4 frame bolts of the folding door. Architecture Lab says folding doors are also known as folding sliding doors, accordion doors, and room dividers.

This finished opening sized for a folding door will allow you to install a door jamb kit or use select ¾ thick wood to create the finished door jamb. The width of a folding door can be cut down to ¼ inch on each side to better fit the rugged opening of a door.

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