Blown mineral wool retrofit interior walls?
I have a client who is interested in getting loose fill mineral wool blown into the attic and interior wall and ceiling cavities (‘drill and fill’) of her 1986 builder-grade house, primarily for insulation in the attic and sound attenuation (noise between rooms and from plumbing). Absolutely does not want to pull off crown moulding/base/trim to add another layer of gyp. board or isolation clips.
I have suggested that this is probably a large cost for a fairly minimal STC improvement, and I’m unfamiliar with any modern blown mineral wool products. I can find one or two on google (roxul’s is discontinued, Rockwool, insul-fill). I’m also a bit concerned about weight on the gyp. when blowing it into a ceiling cavity.
I’m about to start calling representatives for their take on this, but I’m curious – has anyone done drill-and-fill with anything other than cellulose or FG? how did it go?
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