Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Drywall & Plaster

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-22-2012, 01:05 PM   #1
Newbie
 
Join Date: Jan 2012
Posts: 19
Share |
Default

Remove plastic before drywall installation?


I'm finishing my hobby room in the placement. The large part of the basement I'd finished and non finished areas are well insulated and already framed along all the external walls. R12 insulation based on what I can see. It's always very warm and dry thee.
The insulation (and frame with it) is covered with transparent plastic (polyethylene). Is that just to prevent exposed fiberglass insulation or it's a sort of a vapor barrier that I should keep when installing drywall?

Basically, the question is whether to remove polyethylene from the frame before installing drywall or keep it and install drywall on top of it.

Thanks in advance!
avgor is offline   Reply With Quote
Old 01-22-2012, 01:52 PM   #2
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,781
Default

Remove plastic before drywall installation?


Quote:
Originally Posted by avgor View Post
I'm finishing my hobby room in the placement. The large part of the basement I'd finished and non finished areas are well insulated and already framed along all the external walls. R12 insulation based on what I can see. It's always very warm and dry thee.
The insulation (and frame with it) is covered with transparent plastic (polyethylene). Is that just to prevent exposed fiberglass insulation or it's a sort of a vapor barrier that I should keep when installing drywall?

Basically, the question is whether to remove polyethylene from the frame before installing drywall or keep it and install drywall on top of it.

Thanks in advance!
The plastic is a vapor barrier to prevent the normal room air humidity from condensing on the cooler concrete foundation wall behind. It may also be part of what holds the insulation in place.

Except if the foundation was painted with a (usually black) waterproofing on the outside, that is the vapor barrier and you may not have two vapor barriers on the same wall. THe lesser of evils is then to cut holes here and there in the plastic taking up perhaps 25% of the total surface area of the wall and then install the drywall panels over that. And run a dehumidifier from time to time especially in the summer when the humidity is above average.
__________________
The average homeowner who lost his house in the Oklahoma tornadoes should move for good and not rebuild. Too much complexity watchdogging the contractor. Too much a chance to be defrauded.

Last edited by AllanJ; 01-22-2012 at 01:56 PM.
AllanJ is offline   Reply With Quote
Old 01-22-2012, 03:02 PM   #3
Newbie
 
Join Date: Jan 2012
Posts: 19
Default

Remove plastic before drywall installation?


Thanks Allan. I looked underneath the fiberglass (there is about a foot of no insulation from the floor which is I understand is correct - so I have easy access).

There is two layers between the wall and frame/insulation. Facing the concrete wall/foundation is a black thin sheet of some material and I think that looks like some kind of vapor barrier. Then there is what looks like thick black paper or something paper based.

I think that these two layers represent vapor barrier between the outside wall and interrupt frame and etc. In this case, I shouldn't create vapor barriers on both sides of frame and insulation so I should tear that plastic off. Correct?

Thanks again.
avgor is offline   Reply With Quote
Old 01-22-2012, 03:04 PM   #4
Newbie
 
Join Date: Jan 2012
Posts: 19
Default

Remove plastic before drywall installation?


Actually, I've just had a chance to peak under the drywall of finished area and there is plastic so I'm leaving it as it is and will put drywall on top of that plastic I guess.
avgor is offline   Reply With Quote
Old 01-22-2012, 09:25 PM   #5
Registered User
 
Join Date: Mar 2009
Posts: 9,885
Default

Remove plastic before drywall installation?


Where are you located?

Plastic: http://www.buildingscience.com/docum...ts?full_view=1

Gary
__________________
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
Gary in WA is offline   Reply With Quote
Old 01-22-2012, 10:08 PM   #6
Newbie
 
Join Date: Jan 2012
Posts: 19
Default

Remove plastic before drywall installation?


Canada (Ottawa, ON).

Thanks for the link. At this point, I'm not in the position to replace fiberglass batt insulation (and potentially re-frame).

The house is about 12 years old and was built well. There is so far absolutely no moisture problem at any time of the year and I lived here for 2 years now.
avgor is offline   Reply With Quote
The Following User Says Thank You to avgor For This Useful Post:
Gary in WA (01-22-2012)
Old 01-23-2012, 08:03 PM   #7
Newbie
 
Join Date: Dec 2011
Posts: 12
Default

Remove plastic before drywall installation?


Vapor barrier. Leave it on the wall. Drywall right over top of it.

Edit: I am from Cape Breton, NS. We drywall right over the top. It's a 20 mil poly vapor barrier to be specific. Ensure to tape any seems with "tuck tape". About $12 a roll at any local building supplier.

Last edited by CB Painters; 01-23-2012 at 08:09 PM. Reason: Providing clarification
CB Painters is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
In wall gutter downspout causing mold on drywall. chrispy35 General DIY Discussions 12 05-06-2011 10:35 PM
Remove Drywall installed over OSB jrunde Drywall & Plaster 8 03-04-2011 07:42 PM
What's the best way to remove Plaster/Lath walls and replace with Drywall psubaron Building & Construction 31 02-14-2011 11:20 AM
Two layers of faced drywall in attic - remove one or both? TomServo HVAC 1 04-21-2010 06:49 AM
3/8" Drywall Installation Question pjmachine Remodeling 10 02-27-2008 05:07 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.