ceiling joints - кровельные балки?
ceiling framing - каркас кровли ?
roof on Beams or Rafters - кровля на балках и стропилах?
poured or blown materials - Литые и выдувные материалы?
blankets or batts -?

Контекст:

When a roof-ceiling assembly is insulated, blankets or batts are installed between the ceiling joints, but this cavities also can be filled with poured or blown materials. If rigid sheet insulation is installed, it might be installed on the top or the bottom of the ceiling framing.
Rigid board insulation normally is installed above ceilings that cover beams or rafters.

Заранее спасибо