Originally Posted by nealtw
Some structures are built with material that have a high fire rating and don't need to be protected with drywall but that will be the exception not the rule.
Blue Jay; What is the stucture above the pine ceiling, size of rafters and type and thickness of sheeting?
Fredartic; Same question.
Keep in mind that codes change and anything done today should meet todays codes.
Regular trusses with 10" of fiberglass, roof sheeting is 5/8 then ice and water barrier then shingles. My avitar is the home in question. By the way this was a kit from Lincoln Log in NY, self built to their blueprints.