Should screws end in panel or go through?

[tttomten]

I have an upcoming job where I need to fasten long wood screws into 22 mm paneling and have the option to let the tip stop in the wood or take a longer screw and let it go all the way through.

All the descriptions I find are fastening of paneling to a stud where, for obvious reasons, the screw ends in the stud; here it's the opposite with a stud with fittings attached to the paneling. No shearing forces are present, only tension/compression.

Which is stronger?

 

[jonaserik]

A screw is always thinner at the beginning, and if it's only driven to the tip and the wood is thin, the entire cross-section does not grip. So driving it an additional 7 - 10 mm is probably not wrong, provided there's space behind and no vital parts there. Everything depends on what will be hung/attached.

 

[tttomten]

There is space behind and it is not a matter of aesthetics or risk of tearing, etc. I'm only interested in durability; the screw will be subjected to both tensile and compressive forces from the wind.

 

[Tjrex]

Through so you have screw threads in the entire panel piece.