Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
The insulation lining the side, top and back should meet at the corner. When R13 is on the rool, it's only about 1-1/2" thick. It can expand to as much as 3", but is usually closer to 2". Bass passes right through, but it attenuates midrange.