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dsq 02-06-2009 11:06 PM

What Thickness Drywall To Install Over Acoustic Ceiling?
i WANT TO COVER UP A ceiling with acoustic asbestos stucco with drywall.Can i get away with 3/8 thick or will it look wavy?
Im thinking maybe the drywall will flex maybe too much over the unstable acoustic stucco...Thanks

Bob Mariani 02-07-2009 08:46 AM

1/4" would work. Use drywall glue if you are concerned with any sagging. Be sure to use longer screws and to hit the joists.

DangerMouse 02-07-2009 08:58 AM

1/4"? 3/8"?

...for a ceiling?


Bob Mariani 02-07-2009 09:05 AM


Originally Posted by DangerMouse (Post 226577)

He already has a ceiling, this is only an overlay?

dsq 02-07-2009 09:17 AM

yes there already is a drywall ceiling but it has that popcorn/acoustic stucco asbestos junk on instead of disturbing and removing that dangerous stuff i just want to cover over it with new drywall.Its only 160 sq ft.Will 1 5/8 in screws do the trick?Do they make 2 inch screws?

Bob Mariani 02-07-2009 10:34 AM

Yes they do and 2" is the minimum you want to use. but check what depth you do need and do not use screws too long either or they might penetrate plumbing or electrical lines. 2" or 2 1/2" should be fine.

dsq 02-07-2009 12:19 PM

for the ceiling is it necessary to stagger the drywall sheets to break up the seams?

if the ceiling is 12 ft exactly should i use a 12ft sheet drywall instead of 8+4ft...are there any problems with installing large sheets on the ceiling aside from flex and weight?

btw,thanks for the replies so far....

Bob Mariani 02-07-2009 01:24 PM

es use the 12' pieces. But rent a drywall lift or you will be killing yourself working on it.

dsq 02-07-2009 10:05 PM

i was planning on having another person help me.Does it take 3 people to lift and place 12 ft sheets?I dont know about drywall lifts.Can i do ceilings myself with just the lift?I was planning on hiring 1 person to help me without any lift device.
Again there is only 12x15ft area of ceiling to do.So i dont know if it would be cheaper and easier to just hire a person.I also dont have a pickup truck to haul big equipmnet just a 4runner.

I havent done ceilings before but worked one summer on installing metal studs/framing and drywalling walls for a commercial office.

dsq 02-08-2009 12:33 AM

DangerMouse 02-08-2009 05:36 AM

are you positive it's asbestos? if not, go to ace hardware and buy--->Pro-Lab Professional Asbestos Test Kit (As 108). Price: $10.99
if it's not asbestos, tear it down and replace it. if it is, me, i'd get pros in to remove it correctly! once gone, there are many options for ceilings.


Bob Mariani 02-08-2009 06:40 AM

looks like a normal popcorn spray on texture to me, not asbestos. But sheeting over it is less work. With a lift it is a one man job. They break down and fit in a car. Without one two people and a couple of deadman will work. The lift just makes it real easy. Measure carefully, marking each joist on each end along the ceiling on the walls to know where the joists are when you screw the new sheets up. For a small job it may not be worth the $45 rental cost of the lift.

DangerMouse 02-08-2009 07:27 AM

i agree with Mr. Mariani!
if you know the age of the popcorn, that might help determine.
however, a 12 pack, a pizza, and a couple friends will make short work of the covering!
lots cheaper than renting a lift!


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