Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma - Remodeling - DIY Chatroom Home Improvement Forum
Advertisement


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

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

Like Tree4Likes
  • 1 Post By Nealtw
  • 1 Post By mark sr
  • 1 Post By Nealtw
  • 1 Post By Domo
Reply
 
Thread Tools
Display Modes
Old 10-03-2018, 12:28 AM   #1
Member
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 54
Rewards Points: 39
Default

Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


In remodeling the bathroom, it would seem the new 1/2" Sheetrock is thinner than the old drywall. Since the old drywall is over 20 years old, I've no idea what its specified thickness is.

Head on shot:



Image shot at an angle:



Questions:
  • What can be done to smooth the transition between old and new drywall thickness?
  • Also, the old drywall on the right side has old paint that is chipping and should be removed. Is there a good way to remove the old paint? Sand it down? Or is there another technique?

Or, does ALL the drywall need to be replaced to establish the same thickness? Hmm
Attached Thumbnails
Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma-web3.jpg   Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma-web1.jpg  
JasonCA is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2018, 12:32 AM   #2
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 25,443
Rewards Points: 18,776
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


The factory edge is tapered for filling are you sure that is not what you are seeing.
Johnny_inFL likes this.
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2018, 12:45 AM   #3
Member
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 54
Rewards Points: 39
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Quote:
Originally Posted by Nealtw View Post
The factory edge is tapered for filling are you sure that is not what you are seeing.
Great question. The old drywall was cut in the middle. You can see the white gypsum in the image shot at a 45 degree angle (old panel on the right side). And that seems to be a thicker than the new 1/2" thick drywall on the left side. I'm not sure what to do about this thickness difference?

Would I possibly have to put shimmies under the new drywall boards to match the old ones? Or?

And what to do about the old paint on the old drywall boards? How is that best removed? You can see the paint badly chipping in the images on the right side.
JasonCA is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-03-2018, 12:58 AM   #4
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 25,443
Rewards Points: 18,776
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Quote:
Originally Posted by JasonCA View Post
Great question. The old drywall was cut in the middle. You can see the white gypsum in the image shot at a 45 degree angle (old panel on the right side). And that seems to be a thicker than the new 1/2" thick drywall on the left side. I'm not sure what to do about this thickness difference?

Would I possibly have to put shimmies under the new drywall boards to match the old ones? Or?

And what to do about the old paint on the old drywall boards? How is that best removed? You can see the paint badly chipping in the images on the right side.
You should always measure what you have, If you hold a straight edge like a level against the old so it sticks over the new you will see the difference. If it's a big difference measure what you have stick an knife in the crack and mark the depth and you can measure that. If you have 5/8 on the wall, I would change it out or shim the studs. Others here will be able to help you deal with the finish on the old, I have never had to deal with that.
Nealtw is online now   Reply With Quote
The Following User Says Thank You to Nealtw For This Useful Post:
JasonCA (10-03-2018)
Old 10-03-2018, 01:32 AM   #5
Member
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 54
Rewards Points: 39
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Quote:
Originally Posted by Nealtw View Post
You should always measure what you have, If you hold a straight edge like a level against the old so it sticks over the new you will see the difference. If it's a big difference measure what you have stick an knife in the crack and mark the depth and you can measure that. If you have 5/8 on the wall, I would change it out or shim the studs. Others here will be able to help you deal with the finish on the old, I have never had to deal with that.
Consider it done. I will swap the 1/2 drywall out with 5/8 drywall: this way the new 5/8 drywall will match the old 5/8 drywall. It must be Firecode 5/8, but I will double check the thickness once I remove the old panel I used for testing. Your help has made my day!

The only other problem I have is then how I deal with butting up hardibacker that is 1/2 thick to 5/8 thick drywall? Hmmm. Still can't win.

Also, if anyone knows what to do about the old paint on the old drywall, that would be great? I'd like to rule out of the paint can be removed? Or, if the entire drywall with old paint on it must be replaced?
JasonCA is offline   Reply With Quote
Old 10-03-2018, 05:02 AM   #6
retired painter
 
Join Date: Jun 2017
Location: east tenn
Posts: 6,711
Rewards Points: 1,426
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Shim the cement board to match the drywall.
It generally doesn't make sense to try and strip paint from drywall. Usually scraping, a little sanding and a skim coat of joint compound will get it back looking like new.
w0j0 likes this.
mark sr is offline   Reply With Quote
Old 10-03-2018, 11:24 AM   #7
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 25,443
Rewards Points: 18,776
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Quote:
Originally Posted by JasonCA View Post
Consider it done. I will swap the 1/2 drywall out with 5/8 drywall: this way the new 5/8 drywall will match the old 5/8 drywall. It must be Firecode 5/8, but I will double check the thickness once I remove the old panel I used for testing. Your help has made my day!

The only other problem I have is then how I deal with butting up hardibacker that is 1/2 thick to 5/8 thick drywall? Hmmm. Still can't win.

Also, if anyone knows what to do about the old paint on the old drywall, that would be great? I'd like to rule out of the paint can be removed? Or, if the entire drywall with old paint on it must be replaced?
Any kind of 1/8 thick plywood cut into strips behind the cement board on the studs will work.
Mike Milam likes this.
Nealtw is online now   Reply With Quote
Old 10-05-2018, 03:37 PM   #8
Member
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 54
Rewards Points: 39
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Please see attached image:



I'd like to point out the that the left end of the shower curb can be seen in the lower part of Panel #3.

Earlier, NealTW kindly pointed out that I may have 5/8" on the wall. It is thicker than the 1/2", so for the sake of discussion I'll assume the original wall is 5/8" in the bathroom.

Considering I have only 1/2" drywall spare to play with at this point, I threw up Panel #4 which is only 1/2". As can be seen, it butts up with the 5/8" wall. I'll pick up 5/8" drywall, and then replace Panel #4 with 5/8" drywall as that will then solve making Panel #4 flush with the wall.

But, as to my main question: what is the technique that can be used to make the seams flush?

Looking at SEAM #5:

For example, Panel #4 is currently 1/2" as shown in the image. If Panel #4 becomes 5/8", then it will be thicker than the 1/2" that butts up against it: which is SEAM #5 (both Panel #2 & Panel #3). How can I make the transition between 1/2" and 5/8" without it being too noticeable.

My initial thought is that maybe it would be better to have a GAP between PANEL #4 and PANEL #1,2,3. In other words, to make SEAM #5 have a wide gap closer to what is shown at the bottom between PANEL #3 and PANEL #4.

With a GAP, the thought would be that I could mud and tape it which will sort of allow for a gradient transition between the panels the wider the gap is.

Looking at SEAM #1:

Looking at SEAM #1, PANEL #1 is 1/2" that butts up harshly to the original wall which is 5/8" drywall as there is no GAP. Since there is no GAP, this would result in a bump in the wall.

Other ideas would be to shimmy parts of the panels, but then what parts should I shimmy?


Other points of discussion:

The hardiebacker runs quite a bit past the shower curb (shower curb shown in lower portion of Panel #3). Is there any suggestions that I should perhaps bring that back closer to the shower curb? In other words, should SEAM #5 fall closer over the shower curb, if so where? Or, would this not matter too much that PANEL #1,2,3 extend a bit past the shower curb?

Is there any suggestions how I can simplify this or make it a bit easier in terms of dealing with transitions? Or, is there any other ways I can improve this?

Last edited by JasonCA; 10-07-2018 at 07:44 AM.
JasonCA is offline   Reply With Quote
Old 11-18-2018, 11:54 PM   #9
Contractor/Engineer
 
Join Date: Nov 2018
Location: Desert Hot Springs, CA
Posts: 557
Rewards Points: 1,106
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Looks like you have 5/8" drywall.

If it's just a bathroom, rip all the old drywall out and do the whole thing - it'll just be a couple of extra sheets. And you're already going to be doing the mudding and all.

I think you'll be happier and have fewer areas to fudge.
firehawkmph likes this.
Domo is offline   Reply With Quote
Old 11-27-2018, 08:38 AM   #10
Member
 
Join Date: May 2013
Location: Houston, Texas
Posts: 636
Rewards Points: 1,272
Default

Re: Remodeling Bathroom: Old Drywall Thicker Than New Drywall Dilemma


Quote:
Originally Posted by Domo View Post
Looks like you have 5/8" drywall.

If it's just a bathroom, rip all the old drywall out and do the whole thing - it'll just be a couple of extra sheets. And you're already going to be doing the mudding and all.

I think you'll be happier and have fewer areas to fudge.
Yep - that's how you make it right Mike !
195795 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
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
Bathroom Remodeling - To Gut or Not to Gut. learmoia79 Kitchen & Bath Remodeling 5 03-07-2018 07:48 AM
Bathroom Remodeling order of steps Fixif Kitchen & Bath Remodeling 3 07-29-2016 04:24 PM
Bathroom drywall question... StevePax Remodeling 9 01-08-2010 02:30 PM
Drywall for bathroom geoffthemonk Drywall & Plaster 4 11-01-2009 05:58 PM
Basement bathroom remodeling amakarevic Building & Construction 2 04-12-2007 07:59 PM




Top of Page | View New Posts