It's The Ugly Reality About Repair Bifold Door Bottom Pivot
How to Repair Bifold Door Bottom Pivots
Misalignment is likely to be the cause of your bifold doors becoming sagging and scraping on the floor. A few simple adjustments will bring them back in line.
This bottom pivot mounts to the floor or base of a bracket for a sturdy, secure mounting. This kit is threaded to allow adjustment and can be used with many bi-fold door styles.
Anchor or pivot pins that have cracked or broken
Anchor pins and pivots could break or become incorrectly aligned on a bifolding door and cause the doors to slide and scrape the floor. They can also pop out of brackets. There are three easy adjustments that you can make to make your bifolds work again.
Check the bottom pin in case you find that your bifolds aren't rolling smoothly. If it's loose, you can use a screwdriver or pliers to remove it and replace it with a new one. If the hole in the pin isn't large enough to accommodate the replacement, you'll need to drill a new one.
If the pivot pins have cracks, you can repair them by using Bondo or Durham's Wood Filler. Make sure to moisten the area and let the glue dry before you attempt to move the door again.
It is also important to check the other pivots of your bifold door to make sure they're not damaged or loose. It's time to fix any of these issues:
If the anchor pin is cracked or broken or damaged, a piece of piano wire or a sewing needle can be used to replace it. Just be sure to use a tapered end to ensure it's easier to insert and tighten in the anchor. You can also tap the end of the new pin to make it more smooth and a bit more robust. If you are having difficulty getting the new pin into place, try gently rubbing it into place using the mallet of a rubber. This will ensure that the pin is securely in place and can carry the door's weight without shifting or breaking.
Damaged Roller
If your bifold doors scrape on the floor it could be due to an issue with the roller. Alternatively, it might be caused by an old track that has become curved or bent over time. In some instances the issue may be more severe and require a new track.
It is important to fix the issue as soon you realize that your bifold door's bottom hinge is sliding. This can cause the bifold door to fall out of alignment with the frame, making it difficult to open or close. There are a few easy tricks that you can use to correct the issue.
Over time, the wood in the pivot pins as well as anchors are placed can break. If the crack is not too large, you can use glue and secure the piece together. If Repair My Windows And Doors is more extensive or if it has splits in it then you'll require replacing the piece.
You can also determine if the top track and brackets aren't aligned properly by closing the doors to your closet. If the doors aren't parallel to the frame you might need to loosen the top bracket set screw slightly and adjust it. Repeat this process until the doors are aligned. This process should only take just a few minutes.
Broken Track
Over time the tracks of your bifold doors and runners can wear, change, or move. This could cause your bifold doors to be misaligned, or even damaged. This can be frustrating, especially if it means your bifold doors aren't shutting properly. It can also reduce the security of your home. But, if you know where to look and what to do, this issue can usually be resolved fairly quickly.
It is recommended to first check your running tracks for debris and remove it. You can also clean the track, re-lubricate it, and smooth out the surface. If the problem persists it is recommended to tighten up or loosening the top screw to bring the tracks back in the proper alignment.
Another common issue with bifold doors is that they begin to lose their elasticity and scrape the floor. This can be a major discomfort and is caused by a number of causes, such as the use of the doors too often or being poorly installed. There are typically a few simple adjustments that can be made to get the doors back on track.
It's important to note that this issue isn't restricted to bifold doors. french doors, composite doors and uPVC front doors can all fall off their tracks. It's usually because the hinge bolts or fixings haven’t been installed correctly.
Finally, the bottom pivot may break. This is a common occurrence with older bifold doors and can be a problem if they aren't used regularly or are being treated badly. It's most likely caused by cracks or splits in the cap made of plastic or nylon that holds the metal pivot pin.
This is a fairly easy solution, but it will require a lot of patience and a steady hand to complete. In essence, you'll need take off the pivot pin made of steel and the plastic or nylon cap and replace them with new ones. You'll also have to replace the bottom bracket with a new one and then carefully re-fit it to the rail.

Misaligned Doors
Bifold doors are an attractive design for any house, but over time it may experience issues that hinder its ability to open and close. Many of these problems are easily fixed and don't require a professional.
The first step is to identify the reason of your doors being out of alignment. You'll need to employ a level and then look at the gap between the track and the door. If the gap between the door and the track is greater on the top than the bottom, the doors are not aligned. This can be corrected by moving the screw on the pivot bracket to another notch.
If your doors are still in a misalignment, you may need to replace the anchor or pivot pins. They are typically made of wood and can wear out over time. To replace the pins you'll need to take off the doors and then remove the old pin with flathead screwdrivers or pliers. The damaged pin needs to be removed and a new hole drilled for it. If needed, you'll need to trim away the wood that was damaged.
After replacing the pin, fix it to the door and mount it on the brackets. If the door does not sit properly you can shim it by adding more wood or plastic. But, you must be aware that when the door is severely misaligned, it's likely to be easier to replace the entire frame than simply shhim it.
If you hear a squealing sound when your doors open It is most likely due to debris that has become lodged in the tracks. You'll need to get rid of the obstructions blocking the tracks, then apply lubrication. If the rattling is coming from inside the doors then it is an issue with the hinges or mechanism, and will need to be re-fitted. You should only trust a reputable business to install your new doors.