Revisions log for Answer #1542
This is the answer to the question How do I remove old mineral wool on an attic roof?
Revision 1
I have a hard time accepting the idea that the mineral wool should have collapsed with horizontal installation. I rather suspect that the fill height was intentionally lower than the construction height of the ceiling joists. According to the description, there is only drywall under the joists, so only lightweight inserts are recommended. For that reason alone, I would put a question mark in front of the idea of installing more material there. Even if the joists underneath have a stronger deck, you don't have to put more material in there – that's the last word of wisdom. With insulation between the rafters, further insulation is planned anyway. I don't understand the idea of recycling at all, for if the same material is to be used again; then I would just add to it.