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How to adjust your external bifold door

Bifold doors are an excellent addition to any home, but to ensure they continue to function properly, there are a few things you need to know, including how to adjust them. This guide will detail when and how to adjust your bifold doors, as well as general maintenance advice.

Why do bifold doors need adjusting?

Bifold doors are both functional and attractive, but like any door, will require maintenance. While adjustments will be more straightforward if you've opted for high-quality folding doors, it's handy to know some of the common reasons why bifold doors may need adjusting so you're better prepared in future.

Wear and tear

It's important to remember that just because your bifold doors need adjusting, it doesn't mean there is something wrong with them. Like a car, they experience wear and tear over time, especially if they are in constant use. This includes elements such as hinges, pivots and rollers.

Change in season

Whilst high quality doors made from aluminum or treated timber are unlikely to be affected, changes in temperature and extreme weather conditions such as strong wind and rain may affect some bifolds particularly Upvc.

Locking difficulties

If your lead door won't close or lock, check the actual lock for any issues. If you cannot find fault with the lock, your door may have fallen out of alignment with the tracking.

When and how to adjust your bifold doors

While high quality bifold doors like Vufold’s ranges do not require regular adjustments, there may come a time when you need to adjust your bifold. This section will detail when your bifold may need adjustments and how to perform them.

The doors don’t open fully

If your Vufold bifold doors won't open fully, side-to-side adjustments need to be made. To make these, follow the steps below.

Step 1: open your doors as far as possible so you can access the top and bottom pivots.

Step 2: using a Philips screwdriver, move the doors from side to side, left or right. Please see the spacing requirements below based on your door type.

Vufold default door spacings for Ultra, Prestige, Elite and Master door sets

Type of door Top of door to underside of head Bottom of door to cill Door to jam Door to door
3 door set 5mm 10mm 7mm 4mm
4 door set 5mm 10mm 7mm 4mm
5 door set 5mm 10mm 7mm 4mm
6 door set 5mm 10mm 7mm 4mm


Vufold default door spacings for the Supreme aluminium external door

Supreme doors can be adjusted from side to side by up to 10mm. The standard spacing should be +/- 4mm to 5mm between the frame and the access door.

Dragging doors

If your bifold door is dragging when you open or close the door, the height needs to be adjusted. Fortunately, Vufold doors offer an easy solution.

To adjust the height of Ultra, Prestige, Elite or Master doors:

Step 1: identify the intermediate carriers and top pivots.

Step 2: if you're using the Allen key provided, insert this into the pivots and carriers.

Step 3: turn the key clockwise to higher the doors and anti-clockwise to lower them.

Step 3a: if you're using a screwdriver instead, pull down the safety clip and adjust the pivots and carriers according to the spacings listed in the table above.

For Supreme bifold doors, you can adjust the height up or down using the bottom pivot and bottom intermediate carriers. The total height adjustment for these doors is +/- 8mm. You will need to adjust the height gradually until the doors open and close smoothly without catching the cill.

Locking issues

As previously mentioned, locking issues are relatively simple to solve - especially with a high quality door supplied by Vufold. If you're experiencing problems locking and unlocking your Ultra, Prestige, Elite, Master, Finesse or Edge door sets, follow the steps below.

Step 1: eliminate the chance of it being an issue with the actual lock by opening the access door and pulling the handle upwards -  if you can turn the key, the lock is operating normally and the problem is most likely a result of incorrect door adjustment.

Step 2: move the bifold doors over to the side of the lock jamb by altering the pivots until the gap is 4mm.

Step 3: if the lock works, gradually adjust them back the other way to a maximum of 6mm to 7mm or until the lock will not work.

Step 4: make a final small adjustment back to the lock jamb until operational.

Step 5: the height and side-to-side adjustments can be combined, so try altering the height up or down in the top pivot and intermediate carrier using a screwdriver. Adjust these until the lock works or to the default spacings in the above table .

For Supreme doors, try the following:

Step 1: check for an issue with the actual lock by opening the access door and pulling the handle upwards - if the key can be turned, there is no issue with the lock and the doors will need adjusting.

Step 2: check the lock points and the keeps line up. If they don't, lower or raise the door height until they do. Next, check the gap between the frame jamb and the access door is +/- 4mm to 5mm. If not, you'll need to move the doors over based on the side-to-side instructions (located above ).

Step 3: locate the large round adjusters on the three lock keeps. Rotate the adjusters to move them in or out. This will adjust the ‘compression’ inside to outside.

You can use a combination of side-to-side, height and keep adjustments until the lock works.

How to care for your bifold door

Maintaining your bifold door is important as it ensures the longevity of your door and reduce the number of times you need to adjust. In this section, you will find maintenance advice on the main types of bifold door materials.

Wooden bifolds

Regular maintenance is important for wooden bifold doors, to ensure longevity. You should check the finish of your timber bifold every six months and recoat if necessary.

Vufold recommends using wood care milk - a wax-enriched finish enhancer designed to protect the original finish of your timber door which can lengthen time between refinishing.

Vufold also offers several care and finish kits to help maintain your bifold door and ensure it remains in warranty.

Aluminium bifolds

Aluminium bifold doors are incredible durable. As a result, they also require less maintenance than other materials. However, aim for the occasional cleaning routine to ensure your doors remain in top condition. Using a non-abrasive cloth and soapy water (avoid solvent-based cleaning products), wipe away any dirt on the frame and glass panels. You can also use a small brush and hoover to clear the tracks of any debris. Doing this regularly will ensure debris doesn't build up and stop the doors from opening or closing smoothly.

uPVC bifolds

uPVC is more prone to scratches than aluminium and is easily damaged by the sun. Clean uPVC bifold doors as least once a year with warm soapy water and a clean cloth.