nail or screw?

[kalle58]

I will attach studs 45x120 around a newly opened hole in a wall. On one side, I need to insert blocks/shims with a thickness of 0-40mm. How should I attach the studs in the simplest way possible? Nails or screws?

What do I do where there is 90mm of wood before I reach the solid wood?

 

[kvistarn]

it's all the same, just make sure to use a nail long enough that at least one third of it penetrates the solid wood.

 

[Mats]

Screw. Gentler on the wall and easier to handle. Then you can put it in reverse if you have done something a little less "good".