Mounting a 15kg mirror with ONE screw in OSB Gypsum, what screw?

[Advert]

I'm going to put up a mirror that weighs about 15 kg and only has a mounting for ONE screw. The walls are made of OSB and gypsum. What kind of screw and size should I use? It must be ROCK SOLID, it cannot fall down!

This is what the mirror's mounting looks like:

 

[Håbbe01]

Usually use similar to this when handling heavy stuff https://www.biltema.se/bygg/fastelement/expanderskruvar/skivexpander-10-st-2000018837

 

[Advert]

I usually use something similar to this when handling heavy items
[link]

Preferably it should be a gentler screw since it's wallpaper. Also, isn't an expander mainly for drywall?

 

[tergo]

expander should work well if there's osb too but it should be for double drywall
otherwise, a coarse-thread wood screw should also work
try with wood screw first

 

[Advert]

expander should work well if there's OSB too, but it must be one for double gypsum
otherwise, a coarse-thread wood screw should also work

Tips on coarse-thread wood screw? How long etc.? Also thinking so that the head is correct? I assume it should be flat?

 

[Kane]

Preferably a gentler screw as it's wallpaper. And isn't an expander mainly for plasterboard?

Works for other sheet materials as well.
A regular wood screw with the maximum diameter that fits the hanging will hold.

 

[ClasseClas]

With plasterboard + OSB, you can use a wood screw 5x50mm or 6x50mm. The mirror's bracket, the slot, determines the max dia of the screw.

https://www.beijerbygg.se/privat/sv...askruv-spun-efz-kh-tx30-6-0x50-10st-007313176

 

[FredrikR]

Tips on coarse-thread wood screw? How long, etc.? Also thinking about the head to make sure it's right? I assume it should be flat.

Approx. 40mm should be good.

Assembly screws have flat heads and would probably work well in your case.

 

[Advert]

Approx. 40mm should be good.

Mounting screws have a flat head and would probably work well in your case.

Ok so this screw will fix it?

Are you sure? The mirror weighs about 10kg. It wouldn't be good if it fell.




This is what the bracket on the mirror looks like

 

[fribygg]

Ok so this screw will fix it?

Are you sure? The mirror weighs about 10kg. It wouldn't be good if it fell.

[image]


This is how the mount on the mirror looks


[image]

It should work fine

 

[FredrikR]

It should work fine

Yes, I agree, if you have OSB behind it, it will stay.

 

[ClasseClas]

It turned out quite fitting when I saw which screw I chose to put up a wall clock in the living room after re-wallpapering. Gypsum + particle board in the interior walls.

Here is a good picture that gives a sense of how much a wood screw can withstand in different wall mountings. The original poster can then consider how calmly he wants to swim or how difficult it should be to sleep at night.