Our reflective foil insulation stops 97% of radiant heat penetration and loss. Plus, you get a ventilated attic because our soffit and ridge cap are vented, giving you continuous air flow through your attic. You can put as much conventional insulation in your attic as you like.
There are spiral galaxies with numerous, ragged spiral arms in their disks (called ``flocculent'' spirals), so perhaps the self-propagating star formation mechanism is responsible for the flocculent spirals. A ``grand-design''spiral seen face-on. A flocculent spiral with ragged spiral arms.
The elbow also provides for rotation of the lower arm through twisting of the radius and ulna. This twisting allows you to turn your hand palm up or palm down. The rotation of the lower arm is called pronation or supination depending on the direction of movement.