Drive screw through board into drywall

[Hantlangaren]

I will attach 21 mm thick boards to a wall covered with double plasterboard. It becomes a bit inconvenient to place Molly or regular drywall plugs everywhere, as I would then have to align the holes in the board exactly with the plugs. Is there a screw/plug solution where I can screw and plug right through the board AFTER it is mounted, as a complement to the screws that I have installed in the traditional way?

 

[SBH]

you drill through the screw where you want to attach the board.
dismantle everything. now you have holes in the board and the plaster.
just drill and assemble again

 

[cecar33]

If the boards are to be mounted horizontally, find a stud and then measure the center-to-center distance, probably 60 or 45 cm, to ensure a good hold.

 

[Hantlangaren]

Yes, that was pretty smart. Then it's enough for me to align two screws correctly, after I have drilled and inserted the plugs, so the other screws should hit the mark too

...but out of interest, let's say the board is already in place and I don't want to take it down, is there any way to reinforce it by screwing "something" through the board? I don't want to use brackets or anything like that.

 

[Hantlangaren]

If the boards are to be mounted horizontally, find a stud and measure the cc dimension, probably 60 or 45 cm, for good support.

Mounted vertically...and no studs. Also metal studs.

 

[SBH]

what are you going to use the board for?
there's no plug that grips well with plaster (except plaster plug then.like molly)

 

[Hantlangaren]

what will you use the board for? There's really no plug that grips well with plaster (except for plaster plugs like molly).

I will use the technique you suggested in your previous post, my question is more out of general interest...

I was thinking, for example, that you could perhaps use a long universal plug or something that goes through both the wood and the plaster and deforms behind the plaster, and that you use a small metal washer as a support so that the screw head doesn't get pulled into the plug... or some kind of molly with a loose "support ring". If that existed, it would simplify many situations, but I guess I'll just have to file a patent application.

 

[Hantlangaren]

I was wrong about molly, it doesn't need any special construction. As long as the thickness of the material + wall matches the plug, it should work well with molly even "outside" the material you want to attach.

 

[quilding]

...but of interest, let's say the board is already in place and I don't want to take it down, is there any possibility of reinforcing by screwing "something" through the board? I don't want to use angle irons or similar.

I've used spike plugs in double plasterboard. Works excellently. These are put in when the board is already in place. In my case, I've mounted baseboards and other things.

 

[SBH]

Nail plugs and regular plugs are not the best. For it to hold, you need an anchor, the plugs just expand in the hole. You might be able to drill and inject chemical anchors. I will take a look at some solutions.

 

[Torpalainen]

Hello!
There are "smart" plugs to use for whatever you want.
They are sometimes called vippexpander or fjäderexpander.
The disadvantage is that you have to drill a slightly larger hole through both the board and the plaster.
This image is from Harald nyborg's website