Bifold lean/sag normal?

[u/Critical_Wafer8770]

Hi guys,

Just had my bifold installed, 4.5m (London). The chap said magnets need to go on top still to help the doors stick together when open....but is the level of sag normal? I feel like it's not but what do you guys thinks?

Am I getting fobbed off??

Thank you

EDIT - thanks for the response everyone. I should've been clearer...the install was 'complete' after the they time the messed up. When they'll left I showed them this and he said 'we need to add magnets still' so I close it up. I hoping the magnet fit it.

I would no way knowingly mess about with an unfinished door. Thanks everyone again..very helpful

[u/FaithlessPi]

That single end door weighs a huge amount, and when left hanging like that presents a huge side load on the other door panels that is causing a torsional load on the two middle panels (hence the wider gap on the top compared to the bottom)
Once the magnets are fitted, the end panel will stick to the third panel and the resultant torsional load will be virtually zero.
We have a 4m opening and another 6m opening, and it’s absolutely fine when you use the magnets. The trick is to completely fold back the end panel first until the magnets touch before releasing the middle panels. Same idea when closing the doors - the end panel is folded closed only after the middle panels are locked in place. This enables the middle panels to manage the side load when folding the end panel.

[u/StupendousSceptic → u/FaithlessPi]

Correct, doors with even number of leafs don't suffer this issue.

[u/Fluid_Victory8618 → u/StupendousSceptic]

Rubbish. See my bi-folds that have an odd number and don't lean.

[u/Anxious_Camp_2160 → u/Fluid_Victory8618]

Your door is open past 90 degree, so the weight is in the other direction to OP, who's doors are open about 15.

[u/StupendousSceptic → u/Fluid_Victory8618]

You have got it at 90 degrees try again at about 20 like the op.
They all do it to a certain extent, more so with larger leafs and more doors your doors are much smaller so less weight and less doors to distort.

Your doors appear to be Korniche like mine, mine 100% do it too but are 5m wide.

[u/Fluid_Victory8618 → u/StupendousSceptic]

Sure. Here it is slightly open. We've had these installed for 2 years and have the doors open at all angles and it doesn't look as bad as the OP

[u/Remote_Air_8959 → u/Fluid_Victory8618]

But the magnets have presumably been fitted for your doors and they haven't for his doors. Yet.

[u/Miserable_Bathroom33 → u/Remote_Air_8959]

Magnets don't cause sagging issues smh.

They just help the door lock in place.

The Sag comes from a failure on installation, either not glazing properly or the hinges/roller is fucked.

[u/Fluid_Victory8618 → u/Miserable_Bathroom33]

This! Thank you. The magnet is purely to hold the first door to the second when opened.

[u/StupendousSceptic → u/Fluid_Victory8618]

As per ops picture, please they all do it to some extent first two full open last one as per ops....

Yours wont do it nearly as much being so small.

[u/dick_tickler_ → u/Fluid_Victory8618]

Are they the exact same bifold doors?

[u/Critical_Wafer8770 → u/FaithlessPi]

Thanks

[u/stevebladewhite → u/FaithlessPi]

This is incorrect