Would the tight packing of more insulation, such as glass wool,?

Question

Would the tight packing of more
insulation, such as glass wool, in a enclosed space
increase or decrease the insulation value

Answer 1

Packing insulation too tightly will significantly reduce its R value

Answer 2

r-value is a function of the transmission of heat through the medium. Any way to decrease the transmission will increase the R-Value.
One function, such as with glass wool, is to create air space. Packing it tightly seems that it would decrease airspace, and reduce r-value
until you look at this another way...

that same wall thickness, lets say 3 inches

and you packed it to the point where it is a glass pane 3 inches thick. The r-value would be very high.

also look at rigid insulation. This is compressed glass wool, and has very very high values.

This is the same reasoning that we use glass collet in concrete, increasing the strength The glass is actually supercompressed sand.

Answer 3

Buy a good r factor and install properly. Packing can leave air spaces and defeat your whole idea