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Old 05-13-2012, 09:28 AM   #1
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drywall over P&L ?


i have an old house. it has P&L pretty much everywhere. i am going to take down the P&L on the walls, to add insulation. but i do not need to do this for the ceiling. i understand that putting drywall right over the P&L is ok. is this correct ? if so, should i use anything before i put the drywall up ?
any other issues ?

thanx

btw, i have 9" ceilings.

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Old 05-13-2012, 04:30 PM   #2
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drywall over P&L ?


yes you can do that , but take an awl and hammer and try finding the joists . most likely 16 on center but not always the case . run the sheets perpendicular to the joists as usual but try to hit the joists with the fasteners and not just the lath thats about it .

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Old 05-13-2012, 04:32 PM   #3
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drywall over P&L ?


you can also drill holes in the walls and use blow in insulation if you wish.
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Old 05-14-2012, 08:38 PM   #4
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drywall over P&L ?


thanx. yeah i plan to nail to the rafters. but i am wondering if i should use some kind of vapor barrier.

i am not going to blow in the walls. that is coming down. i actually started 1 room today. 1 reason for the p&l to come down is updated electrical and new framing for the new, different sized windows i am getting.
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Old 05-14-2012, 08:44 PM   #5
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drywall over P&L ?


It would be far better to also remove the plaster on the ceiling.
If for some strange reason you deside to leave it do not even think about using nails, use 3' sheetrock screws instead.
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Old 05-14-2012, 09:13 PM   #6
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drywall over P&L ?


removing it is not going to happen. i would rather leave it as is, than remove it.

screws, yeah. idk why i said nail.
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Old 05-14-2012, 09:36 PM   #7
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drywall over P&L ?


Do they recommend a vapor barrier where you live? I have heard of using spray foam as a vapor barrier in an attic where none exists (probably like your P&L), but I'm not sure how that would play out with an added drywall layer.

And given what a PITA it would be to clear out all your insulation to spray foam, plus you likely need insulation on top of the foam, you might as well remove the P&L ceiling. How much more mess could it be when you are knocking down the walls?
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Old 05-14-2012, 09:58 PM   #8
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Do they recommend a vapor barrier where you live?

How much more mess could it be when you are knocking down the walls?
idk. i am trying to find out. but like you said = how would that react with P&L throw in the equation .


a TON !!! we are living here. and with a job(for now) i can do only so much at a time. i can't shut down half the house for weeks to do that. i just did a small area of a wall in an unused room, and the wife was complaining, i left it a bit messy. she didn't like that. i had to nicely tell her to stfu or do it herself.

thanx for the reply
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Old 05-14-2012, 10:08 PM   #9
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i had to nicely tell her to stfu or do it herself.
I'm sure that went over well.
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Old 05-15-2012, 06:08 AM   #10
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You can go over the old p&l I would not take it own if you don't have to. Couple questions.
How is the electrical run. If any in the ceiling. Don't use too long of a screw or you may hit a water pipe or wire.
What is directly above that room? If old bath room with cast iron tub you may want to tear ceiling out and beef up joists from the weight.
Other than that I wouldn't take out the ceiling because it can open up Pandora's box. That old rough cut lumber is exactly what the name says rough cut and not plum. The old plaster can be 1/4" thick in some areas and 3/4" in others because of the framing. Good luck
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Old 05-15-2012, 02:51 PM   #11
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drywall over P&L ?


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i have 9" ceilings.


Quote:
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use 3' sheetrock screws
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Old 05-15-2012, 08:51 PM   #12
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I'm sure that went over well.
she knows not to argue with me. but saying that,i am not a dictator.
when i was a teen, i decided to help my dad paint the house. i was doing it right, and kinda quick. he told me i was doing it all wrong(i was doing it the way he was. i was watching him). i set the paint brush down and walked away. i never helped again.

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You can go over the old p&l I would not take it own if you don't have to. Couple questions.
How is the electrical run. If any in the ceiling. Don't use too long of a screw or you may hit a water pipe or wire.
What is directly above that room? If old bath room with cast iron tub you may want to tear ceiling out and beef up joists from the weight.
Other than that I wouldn't take out the ceiling because it can open up Pandora's box. That old rough cut lumber is exactly what the name says rough cut and not plum. The old plaster can be 1/4" thick in some areas and 3/4" in others because of the framing. Good luck
all of the K&T is being replaced. so no issue there. there is an empty attic up there.
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some typos there, A
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Old 05-15-2012, 08:57 PM   #13
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drywall over P&L ?


here is where i am at in the "learning" room. this is about 2hrs work. this is going to be our temp bedroom, while i do thee bedroom. otherwise its just a storage room. a new window is going in, once i decide what to get.
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Old 05-15-2012, 08:59 PM   #14
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oh. the P&L on the interior walls. i am just going to drywall over em. call me lazy, but screw that tearing out all that chit.
and there was no insulation in that wall.
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Old 05-16-2012, 09:04 AM   #15
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drywall over P&L ?


Just remember you will have to get extenders for your electrical boxes and existing wiring will need to be long enough to reach into them. You cannot splice length on and meet code.

You did say you are pulling new wiring though?

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