Blown-In Cellulose Over Non-Ducted Ceiling Cassette
My all borate cellulose is scheduled to be blown in this coming Friday, May 7th! Finally made it! “ALMOST” all air ceiling done along wall partitions, eaves, light boxes, etc. I’ve hesitated on the two SLZ ceiling cassettes and two bath fans (yes, ducted to outside).
1)Do I need to build a xps rigid box over these units and seal it to the attic floor?
2)Or can we just put non expanding sprayfoam at the ceiling/unit junction and let the cellulose do the rest?
3) I have some left over bats of mineral wool. Would I be wise to wrap around and on top of the the unit with some bats first, then let the cellulose fill the rest…then, if maintenance was needed, the cellulose could be moved aside/away and the bats removed? My first thought is it would be better to have the cellulose fill all the nooks and crannies around the devices rather than wrap bats around them.
4) Overall attic: I was planning on laying the left over bats of mineral wool (that I used for exterior/interior walls) on top of the blown cellulose in the attic. I should have returned it to the store for a credit but I was too tired before the drywallers came and closed up the ceiling so I just threw it up on the attic rafters…now it’s too big to keep packaged and remove thru the hatch door.. So I figure I will just unpackage and lay it over the cellulose (perpendicular to the ceiling joists). Other than weight, does this approach cause any concerns?
Would love some feedback/advice! Any tips for a first time green owner/builder approaching the finish line?
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