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Fix'n it 07-29-2012 08:33 PM

ceiling drywall
 
i am putting in new ceiling drywall. i want to blow in a bunch of cellulose insulation. is 1/2" ok. 16" oc. oh, wait. i am sistering 2x6's to the old 2x4's. so it will be less that 16"oc.

oh'mike 07-29-2012 09:08 PM

Yep--You will be fine with 1/2 inch----it's done all the time---

If you are not going to use a roll insulation with a vapor barrier---you will need to add a vapor barrier between the joists and the drywall---

Fix'n it 07-29-2012 09:30 PM

ok, 1/3 it is, as i already have it.

VB, i had not considered that. what is recommended ? that HD or manards has.

Fix'n it 07-29-2012 09:36 PM

lol. how did 1/2 turn into 1/3 ...

oh'mike 07-29-2012 09:47 PM

TYPO___1/2 inch----need to get a new set of eyes!

Fix'n it 07-29-2012 09:52 PM

yeah, i typo'd too.

now , what about the VB ?

oh'mike 07-30-2012 08:05 AM

We need an insulation person here---I always use faced bats--I don't know what would be an accepted vapor barrier---sorry---

princelake 07-30-2012 08:16 PM

i've always put up a 6mm vapour barrier, boarded the ceiling then had the insulation blown in

Fix'n it 07-30-2012 09:30 PM

Quote:

Originally Posted by oh'mike (Post 977419)
We need an insulation person here---I always use faced bats--I don't know what would be an accepted vapor barrier---sorry---

i have been doing research. it looks as if a VB is not needed, other than the paint (a few layers). in fact, it looks as though VB's are going out of style.

Nailbags 07-31-2012 12:27 PM

Quote:

Originally Posted by Fix'n it (Post 977142)
i am putting in new ceiling drywall. i want to blow in a bunch of cellulose insulation. is 1/2" ok. 16" oc. oh, wait. i am sistering 2x6's to the old 2x4's. so it will be less that 16"oc.

5/8" is the standard according to the Gypsum guide book. and code in 99.99% of places.
Never mind you got less then 16"oc you will be fine.

Nailbags 07-31-2012 12:32 PM

Quote:

Originally Posted by Fix'n it (Post 977962)
i have been doing research. it looks as if a VB is not needed, other than the paint (a few layers). in fact, it looks as though VB's are going out of style.

Yep after tape and mud PVA primer texture and then PVA over that and paint. Vapor retarder.

Fix'n it 08-01-2012 09:39 PM

ok, guys. how about "lightweight drywall" ? is that ok for a ceiling ?

oh'mike 08-01-2012 10:02 PM

Yep---love the stuff----your back will thank you---

Fix'n it 08-01-2012 10:31 PM

Quote:

Originally Posted by oh'mike (Post 979392)
Yep---love the stuff----your back will thank you---

THANX , man :thumbsup: i was hoping to hear that ! yes, my back did thank me, today. as i brought home 7 sheets of it. and i have a bunch more, over the next few months, that i will be working with. i really could tell the difference.

federer 08-08-2012 02:03 AM

sorry to butt in-i am doing the ceiling too. so 1/2 is ok no need for 5/8th it looks like we decided?


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