How do you firproof a stud wall? ...
Answers: You need to establish what rating you want to pull off. This is measured in time thus - 1/2 hr, 1 hour, 2 hours and 4 hours. This is the nominal time for which the wall willl retain its integrity.
A average plaster board wall properly constructed will give 1 hr, the fireproofing comes from the plasterboard, and more layer give greater protection, although surrounded by greater thicknesses it is more usual to construct in solid masonry.
i hold many conifers but i enjoy never planted them against a stud wall