Must the Sechach be secured to the Sukkah to the point that a common wind cannot take it down?<a href="#_ftn1" name="_ftnref1">[1]</a>
Yes. Thus, if one has a light mat which he is using for Sechach it must be secured with rope, so it does not blow away with the wind.
<a href="#_ftnref1" name="_ftn1">[1]</a> See Sefas Emes Sukkah 23a; Piskeiy Teshuvos 628:2 footnote 6

Shulchan Aruch HaRav | ❓Must the Sechach be secured to the Sukkah to the point that a common wind cannot take it down?

Must the Sechach be secured to the Sukkah to the point that a common wind cannot take it down?[1] Yes. Thus, if one has a light mat which he is using for Sechach it must be secured with rope, so it does not blow away with the wind. [1] See