I am to the point of insulating the walls in the garage and as you can imagine they have wires, nails and other objects protruding out. The 2x4 wall studs are spaced 22 inches apart (existing). I am looking for ideas to insulate them. I first thought about spray foam but I am thinking about putting the MDF walls up and leaving a gap at the top to blow Cellulose in and the pack the last bit with fiberglass for settling later on and then piecing the access hole with MDF. I have been quoted 1.90 per board foot on the closed cell spray foam but was thinking that it can be done cheaper with blowing in cellulose.
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Insulating non standard wall stud widths??
- Thread starter DustynF
- Start date
ForceFed70
Well-known member
22OC sounds really odd to me. It makes it a real PITA to sheet later. Either way, I would use typically batt insulation ment for 24" OC wood framing. The batts are actually 23" wide and should fit.
Why not wet spray cellulose? It will be a lot cheaper then spray foam and will fill all the gaps better then fiberglass.
Is that possible to do with a rental machine? I am guessing not.
Is that possible to do with a rental machine? I am guessing not.
I doubt you will find a rental machine that will do the wet spray, get a couple of quotes anyway, around here it's not uncommon to find a guy who can come and do the entire job for just a little more then buying the materiel by itself.
One of the guys I work with had a foot blown into the ceiling of his 1000 square foot garage and it was only 100$ more to have it done then to buy the insulation at home depot.
Rich H.
Well-known member
If you want to use fiberglass, 24 on center material will fit only a tiny bit tight (not enough to do any harm).
If you want to use cellulose and can't have it wet sprayed, you're best off to dense pack it. Dense pack will not settle, ever. This will give you the best noise mitigation and least air intrusion for the buck......
The easy way to make sure it's being packed to sufficient density is the Mooney Wall approach. Google "Mooney Wall" and/or see my build thread for more info.
Basically the mooney wall approach is install horizontal straps 16" on center, staple and glue an inexpensive fabric called insulweb or insulmesh to the strapping, then blow your cellulose into that. It allows you to see if you have missed any spots and check your density of material as you go, rather than blowing blind and hoping for the best.
The main drawback to dense pack cellulose is, it requires a rather powerful machine to do it. Menard's Krendl machine works great, but the stuff Lowes and HD have will not do the job. Lowes and HD really want you to use fiberglass because it has a higher profit margin.
If you're not going to dense pack the cellulose then forget it entirely, and go with fiberglass throughout IMO....
If you want to use cellulose and can't have it wet sprayed, you're best off to dense pack it. Dense pack will not settle, ever. This will give you the best noise mitigation and least air intrusion for the buck......
The easy way to make sure it's being packed to sufficient density is the Mooney Wall approach. Google "Mooney Wall" and/or see my build thread for more info.
Basically the mooney wall approach is install horizontal straps 16" on center, staple and glue an inexpensive fabric called insulweb or insulmesh to the strapping, then blow your cellulose into that. It allows you to see if you have missed any spots and check your density of material as you go, rather than blowing blind and hoping for the best.
The main drawback to dense pack cellulose is, it requires a rather powerful machine to do it. Menard's Krendl machine works great, but the stuff Lowes and HD have will not do the job. Lowes and HD really want you to use fiberglass because it has a higher profit margin.
If you're not going to dense pack the cellulose then forget it entirely, and go with fiberglass throughout IMO....