The problem is, as I said, you can only step on the studs which is only 1 1/2 inch wide. So you got to be careful not to step in between, or you'll crash the ceilling. As a result, one of your hand has to hold on to something, while the other one carry the stuff. It's a time consuming job.
Once there, it's very simple to do: just wipe the loose stuff away, put down the block ones, then put back the loose stuff. Remember that if the original loose stuff is 8 inch high, then after you move them away then back, there maybe 5 inch left, 'cuase during all these steps, they get packed.
I put R32 (R20 + R12) at the edge areas, and R20 + loose stuff in other areas in one room. Didn't touch the central areas where there's more than enough stuff already.
Note that there's a special R12 mat which has many pre-cut lines (2inch wide?) so it's very easy to tear them apart(if required) into many slimmer strips; you need such kind of strips to fill some gaps.
Also, you need to install a light at beginning.
Once there, it's very simple to do: just wipe the loose stuff away, put down the block ones, then put back the loose stuff. Remember that if the original loose stuff is 8 inch high, then after you move them away then back, there maybe 5 inch left, 'cuase during all these steps, they get packed.
I put R32 (R20 + R12) at the edge areas, and R20 + loose stuff in other areas in one room. Didn't touch the central areas where there's more than enough stuff already.
Note that there's a special R12 mat which has many pre-cut lines (2inch wide?) so it's very easy to tear them apart(if required) into many slimmer strips; you need such kind of strips to fill some gaps.
Also, you need to install a light at beginning.