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


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-26-2008, 12:17 PM   #1
Newbie
 
Join Date: Feb 2008
Posts: 2
Share |
Default

3/8" Drywall Installation Question


Have been working on a 2.5 story stairwell which previously had paneling on top of ¼” plywood. The plywood runs behind the stair stringers (and some additional framing) so removal is not an option without doing a lot of demo/cutting. My question is, if I were to install 3/8” drywall will there be enough support between the studs to allow for horizontal sheet installation (rather then vertical) simply because it would look much nicer (fewer butt seems). I’m concerned about too much flex in the sheets between the studs that would cause the horizontal seems to crack . . . been considering using adhesive at the seems in addition to extra screws into the ply in between the studs. All studs look to be 16”oc.

Any comments would be appreciated - Thanks!
pjmachine is offline   Reply With Quote
Old 02-26-2008, 02:18 PM   #2
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Default

3/8" Drywall Installation Question


So the end product would be 3/8" drywall over 1/4" plywood? It shouldn't be that much of an issue. Just glue heavy and make sure the screws aren't driven too far in.
jerryh3 is offline   Reply With Quote
Old 02-26-2008, 06:35 PM   #3
Member
 
Join Date: Sep 2007
Location: Pacific Northwest
Posts: 123
Default

3/8" Drywall Installation Question


Drywall is normally installed over the studs without any backing. Granted, the norm is 1/2" drywall. In your case, the 1/4" plywood should be enough to make up the difference. If you are assuring that the butt seams meet on a stud, there should not be a problem with cracking. If you are going to simply have the seams meet between the studs, I would be a bit concerned about the flex as you suggested. You can use a stud finder to locate the studs.

I have a wall that flexes when the door is closed too hard. There are butt seams on it that have cracked. This is why I am concerned about not meeting on the studs.
Handyman50 is offline   Reply With Quote
Old 02-26-2008, 08:09 PM   #4
Lic. Builder/GC/Remodeler
 
AtlanticWBConst.'s Avatar
 
Join Date: May 2006
Location: New England
Posts: 7,556
Default

3/8" Drywall Installation Question


Re-nail all plywood. In fact, you should use a pnuematic stapler, if you have access to one.

Do not use 3/8" S/R.
Use 1/2" with your 16" OC framing.

When you install your sheetrock using 1-1/4" course thread screws (for wood framing - fine thread is for steel), that will "sandwich" the 1/4" plywood. It will not go anywhere, nor will it make any difference in the sheetrock application. There is no need to glue the sheetrock onto the plywood, as it will also, make absolutely NO difference with the installation.

Last edited by AtlanticWBConst.; 02-26-2008 at 08:14 PM.
AtlanticWBConst. is offline   Reply With Quote
Old 02-26-2008, 09:00 PM   #5
Member
 
Join Date: Sep 2007
Location: Pacific Northwest
Posts: 123
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by AtlanticWBConst. View Post
Re-nail all plywood. In fact, you should use a pnuematic stapler, if you have access to one.

Do not use 3/8" S/R.
Use 1/2" with your 16" OC framing.
AWFC, why, since he has a backer of 1/4" plywood, would it be necessary to use 1/2" S/R? I would always use 1/2" in any instance, but why in this application? This is for my knowledge. Thanks!
Handyman50 is offline   Reply With Quote
Old 02-26-2008, 09:28 PM   #6
Lic. Builder/GC/Remodeler
 
AtlanticWBConst.'s Avatar
 
Join Date: May 2006
Location: New England
Posts: 7,556
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by Handyman50 View Post
AWFC, why, since he has a backer of 1/4" plywood, would it be necessary to use 1/2" S/R? I would always use 1/2" in any instance, but why in this application? This is for my knowledge. Thanks!
I do not consider 1/4" plywood over 16" OC framing, as a proper "backerboard" (to any degree)...

Example: Installing 1/4" cement board over 16" OC rough framed walls...is not a backerboard for tile.

3/8" S/R. is not meant to be used on 16" OC framing. It is primarily used, to be installed onto a solid surface. Example: we only use it to build out surface areas, or to overlay onto existing GWB walls.

Because there is existing 1/4" plywood over the 16" OC framing, should not be a reason to drop down to a 3/8" GWB. In fact, the plywood, itself could have irregularities in it, that can transmit, visually, to 3/8" GWB. You should stick with the standard 1/2" for 16" OC, to be safe. The additional cost is reasonable.

Side note: GWB = Gypsum Wall Board (just in case someone is not aware. Industry term)

Last edited by AtlanticWBConst.; 02-26-2008 at 09:41 PM.
AtlanticWBConst. is offline   Reply With Quote
Old 02-27-2008, 08:15 AM   #7
Newbie
 
Join Date: Feb 2008
Posts: 2
Default

3/8" Drywall Installation Question


Thanks for all the comments. To reply to AtlanticWBConst post, I was just on Sheetrock brand's web site and they have a pdf regarding installation/finishing of their products. They do state that 3/8" sheetrock may be installed horizontally or vertically with 16" oc max spacing in a single layer application, similar to 1/2". Their requirements for 1/4" are different. I guess that also answers my question, but all of your comments have been very useful.
pjmachine is offline   Reply With Quote
Old 02-27-2008, 11:36 AM   #8
Member
 
Join Date: Sep 2007
Location: Pacific Northwest
Posts: 123
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by AtlanticWBConst. View Post
I do not consider 1/4" plywood over 16" OC framing, as a proper "backerboard" (to any degree)...

Example: Installing 1/4" cement board over 16" OC rough framed walls...is not a backerboard for tile.

3/8" S/R. is not meant to be used on 16" OC framing. It is primarily used, to be installed onto a solid surface. Example: we only use it to build out surface areas, or to overlay onto existing GWB walls.

Because there is existing 1/4" plywood over the 16" OC framing, should not be a reason to drop down to a 3/8" GWB. In fact, the plywood, itself could have irregularities in it, that can transmit, visually, to 3/8" GWB. You should stick with the standard 1/2" for 16" OC, to be safe. The additional cost is reasonable.

Side note: GWB = Gypsum Wall Board (just in case someone is not aware. Industry term)
Thanks, AWBC. As I said, I wanted to hear the reasoning of a pro.
Handyman50 is offline   Reply With Quote
Old 02-27-2008, 02:32 PM   #9
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by pjmachine View Post
Thanks for all the comments. To reply to AtlanticWBConst post, I was just on Sheetrock brand's web site and they have a pdf regarding installation/finishing of their products. They do state that 3/8" sheetrock may be installed horizontally or vertically with 16" oc max spacing in a single layer application, similar to 1/2". Their requirements for 1/4" are different. I guess that also answers my question, but all of your comments have been very useful.
My house, which had a remodel sometime in the 70's, had 3/8" on some of the walls. I would never use it new construction though. The only time we ever used 1/4" was when doing curved walls and ceilings. We would laminate two sheets together.
jerryh3 is offline   Reply With Quote
Old 02-27-2008, 03:54 PM   #10
Lic. Builder/GC/Remodeler
 
AtlanticWBConst.'s Avatar
 
Join Date: May 2006
Location: New England
Posts: 7,556
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by pjmachine View Post
Thanks for all the comments. To reply to AtlanticWBConst post, I was just on Sheetrock brand's web site and they have a pdf regarding installation/finishing of their products. They do state that 3/8" sheetrock may be installed horizontally or vertically with 16" oc max spacing in a single layer application, similar to 1/2". Their requirements for 1/4" are different. I guess that also answers my question, but all of your comments have been very useful.

It is your home, you may do as you wish. I still don't understand why you want to attach 3/8" sheetrock over rough framing.
Regardless of the sheetrock manufacturer's site information, I still do not recommend it. 1/2" Is the industry standard, for the reasons stated earlier.
(FWIW: In all the years we have been in business, we have never seen 3/8" S/R installed over 16" OC rough framing, by a professional contractor - in new construction, remodeling, repairs, or any other applications)

What ever you decide to do, Good Luck on your project.

Last edited by AtlanticWBConst.; 02-27-2008 at 03:57 PM.
AtlanticWBConst. is offline   Reply With Quote
Old 02-27-2008, 05:07 PM   #11
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Default

3/8" Drywall Installation Question


Quote:
Originally Posted by AtlanticWBConst. View Post
It is your home, you may do as you wish. I still don't understand why you want to attach 3/8" sheetrock over rough framing.
Regardless of the sheetrock manufacturer's site information, I still do not recommend it. 1/2" Is the industry standard, for the reasons stated earlier.
(FWIW: In all the years we have been in business, we have never seen 3/8" S/R installed over 16" OC rough framing, by a professional contractor - in new construction, remodeling, repairs, or any other applications)

What ever you decide to do, Good Luck on your project.
Agreed. If you don't need to use 3/8", don't. I thought you needed to use it for clearance issues, but if you are able to use 1/2", use it.
jerryh3 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
Drywall over drywall? And a bonus flooring question! perpetual98 Remodeling 18 01-02-2008 10:36 AM
Drywall Painting Question WorkOnIt Painting 8 06-14-2007 04:12 PM
General easy drywall question bigboyjoel Building & Construction 3 05-27-2007 08:52 AM
Drywall thickness on ceiling question. Doug Crf Building & Construction 3 08-28-2006 05:47 AM
Drywall question Not Sure Building & Construction 6 08-27-2006 03:05 PM




Top of Page | View New Posts

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