Of course, I've read and searched a lot about this but can't find the optimal solution. Some recommend wedges, others silicone, some screws, and others something else.
I assume different stairs can have different issues and that various methods might help.

My stairs look like the ones in the picture, and every step creaks.
What are your best tips? I'm going to paint the stairs, so I could put screws from the outside and angle screw from the inside towards the wall and make these "invisible" with filler and paint.
 
  • Wooden staircase with open risers and black metal balusters, located in a modern interior with wooden floors and decorative plants.
L
It is free-hanging on one side, in my opinion not good, they tend to creak, they twist. Try a little support under the 5th step on the outer edge, a piece of timber works well, but first put a piece of board on the floor so there are no marks, it should press against the step to support well, usually helps with support against creaking, but no guarantee.
 
You can perform a regular troubleshooting. Examine one thing at a time. The steps look a bit odd. What material are they made of? However, start by testing the outer stringer. I think it appears to be mis-glued. The wood fibers should always run lengthwise. Support this stringer in several places so that everything is rigid, and test by walking on it. If that doesn't help, you should examine the steps, attachment, and dimensions. Note that my idea differs from the one presented by Liteavvarje.
 
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J justusandersson said:
You need to do a standard troubleshooting. Investigate one thing at a time. The treads look a bit odd. What material are they made of? Start by testing the outer stringer. I think it seems to be misglued. The wood fibers should always run lengthwise. Support this stringer in several places so that everything is rigid, and test it by walking. If that doesn't help, you need to investigate the treads, fastenings, and dimensions. Note, my idea differs from the one Liteavvarje has presented.
Nothing wrong with that, everything will be fine once you get started and sort out the problem, maybe through different perspectives.
 
It seems to be some laminate on the underside of the steps.

Will try to troubleshoot a bit when I have time.
 
I was thinking of trying to tighten one of the steps to see if it helps. The question is whether you should try to push up the step and tighten or if you should push down and tighten.
 
I think you should approach the problem in a more systematic way. The treads seem to be recessed into the stringers and probably then screwed through the stringers. If it's done that way with decent precision, one more screw probably won't help. Since there is laminate on the underside, the cores of the treads might be chipboard or MDF or something similar, all quite unsuitable for that purpose. First, check that you can rule out the outer stringer as the cause of the creaking.
 
Painted a creaking staircase at a customer's place.
They had ordered a new railing from a local staircase manufacturer. Talked to them about the creaking.
The solution:

Screw the steps diagonally into the stringer from the underside with two slightly thicker screws on each side of the steps.

Did this and the staircase is completely silent and has remained so for 3 years...
 
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