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.
No design is perfect at achieving all of these objectives but several basic design types have stood the test of time: 1  Double wishbone, also known as A-arm. 2  MacPherson strut. 3  Multi-link. 4  Swing arm or trailing arm. 5  Swing axle. 6  Solid axle (also called live axle) designs, usually using leaf springs.