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 02-22-2012, 11:22 PM   #1
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


I had a pedestal sink that was leaking and I found out it was not installed with a backer board so I had to cut a hole in my wall to add the board. I found that I have drywall, but then they have maybe a little under 1/2 of plaster on top of that. Do I need to shim the backboard and drywall so it's flush or can I just do a lot of thin coats of mud? I have some of the mesh tape I already planed on using the seams, I just want to do it correct and hopefully avoid cracking in the future.

bryanp22 is offline   Reply With Quote
Old 02-23-2012, 02:59 AM   #2
Member
 
Join Date: Dec 2010
Location: BC Canada
Posts: 500
Rewards Points: 500
Default

fixing wall with drywall with plaster over it


any pics?

chrisBC is offline   Reply With Quote
Old 02-23-2012, 06:00 AM   #3
Too Short? Cut it Again!
 
Join Date: Sep 2009
Posts: 9,635
Rewards Points: 2,000
Default

fixing wall with drywall with plaster over it


1/2 is a lot of mud! How big an area are you talking about?
user1007 is offline   Reply With Quote
Old 02-23-2012, 07:34 AM   #4
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


Probably 26x10. Here is a pic
Attached Thumbnails
fixing wall with drywall with plaster over it-image-3587980912.jpg  
bryanp22 is offline   Reply With Quote
Old 02-23-2012, 09:40 AM   #5
Too Short? Cut it Again!
 
Join Date: Sep 2009
Posts: 9,635
Rewards Points: 2,000
Default

fixing wall with drywall with plaster over it


You need a drywall patch section. You will want to cut out both sides to the next studs and squaring off the hole while you are at it will make it easier to match up and cut the patch. Then screw a piece of 2x the height of the patch to those studs. It looks like the wall was brought forward if I am seeing the pic correctly so you will have compensate for that. This will give you something to which you can screw the drywall patch as well as the studs already there. You cannot have the ends flapping though, hence the added blocks. Once the patch is screwed in place, tape and mud like you would regular drywall. You will want to fill in and skim coat the portion of the wall that tore loose when the vanity was removed too. You will then have to try and match the surface texture which was probably not plaster but some sort of drywall knockdown treatment (I actually cannot see texture in your photo so wonder if it was just roller stipple and paint?). Make sure you have a nice, large drywall blade---something like 6x12 or even longer the size of a mud tray.

Last edited by user1007; 02-23-2012 at 09:46 AM.
user1007 is offline   Reply With Quote
The Following User Says Thank You to user1007 For This Useful Post:
chrisBC (02-23-2012)
Old 02-23-2012, 03:36 PM   #6
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


They notched the wall for the prior 1x8 that had been used for the backer board. So basically I have to have the drywall flush with the plaster much as possible. So if has 1/2 inch of plaster on top of the original drywall I'll have to shim out the new drywall so the drywall is even with the existing plaster. If I just put a 2x4 behind the wall and attach the drywall to that my patch will still be 1/2 lower than the plaster wall surface unless I move the patch out further than the studs.
bryanp22 is offline   Reply With Quote
Old 02-23-2012, 06:39 PM   #7
Member
 
Join Date: Dec 2010
Location: BC Canada
Posts: 500
Rewards Points: 500
Default

fixing wall with drywall with plaster over it


then you need to determine how much you need to shim it out (half inch?) and add this to your backing. From what I can tell, anyways. You just need to do whatever necessary to make the patch flush with the surface.

maybe half inch plywood to fur out the backing would work, secure that to your 2x4, then drywall.
chrisBC is offline   Reply With Quote
Old 02-23-2012, 08:43 PM   #8
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


Here is a side shot of a piece I cut out. 3/8 drywall and then plaster to get to 3/4 inch.
Attached Thumbnails
fixing wall with drywall with plaster over it-image-4073373397.jpg  
bryanp22 is offline   Reply With Quote
Old 02-25-2012, 06:50 PM   #9
Pure Genius
 
Join Date: Jan 2011
Location: Dayton OH
Posts: 223
Rewards Points: 150
Default

fixing wall with drywall with plaster over it


Use a piece of 5/8 drywall to fill in the patch. Mud in the rest. It can be done. The last one i did took 7 coats
Dierte is offline   Reply With Quote
Old 02-26-2012, 10:06 AM   #10
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


I ended up just shimming the wall. Two paint stir sticks were the perfect thickness. The biggest pain is the plaster on the wall is pretty wavy so it a couple spots my patch sticks above but 95% is flush with the existing wall.
bryanp22 is offline   Reply With Quote
The Following User Says Thank You to bryanp22 For This Useful Post:
chrisBC (02-26-2012)
Old 02-26-2012, 11:00 PM   #11
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


Do people recommend a trowel for skim coating or does a blade work? I have a 10 blade and it didn't seem to work that well with a wavy plaster wall.

Here is a picture of texture. Is just from painting or do they use some form of spray texture and knockdown technique?
Attached Thumbnails
fixing wall with drywall with plaster over it-image-3961644877.jpg  
bryanp22 is offline   Reply With Quote
Old 02-27-2012, 05:06 AM   #12
Pure Genius
 
Join Date: Jan 2011
Location: Dayton OH
Posts: 223
Rewards Points: 150
Default

fixing wall with drywall with plaster over it


I used my 12" knife.
Dierte is offline   Reply With Quote
Old 02-27-2012, 01:55 PM   #13
Member
 
bryanp22's Avatar
 
Join Date: Nov 2011
Location: Milwaukee WI
Posts: 414
Rewards Points: 250
Default

fixing wall with drywall with plaster over it


Any ideas on the wall texture from my original post? I'm hoping that is just from rolling the paint on
bryanp22 is offline   Reply With Quote
Old 02-27-2012, 02:17 PM   #14
retired union carpenter
 
Join Date: Nov 2011
Location: PA
Posts: 323
Rewards Points: 250
Send a message via Yahoo to coupe
Default

fixing wall with drywall with plaster over it


"Here is a picture of texture. Is just from painting or do they use some form of spray texture and knockdown technique? "

I believe your flat 10" blade will work to get very close. by using a very short napped roller over tin skim coat. maybe try a few light skim coats on a board, allowing different drying times and roll lightly say in 5 minute intervals? experiment along those lines.

__________________
as always, just my thoughts
good luck....coupe/Larry
take what helps? ignore the rest.
coupe 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
Bathroom Remodel - Resurfacing Plaster over Concrete Block itcanadian Remodeling 2 05-30-2011 10:10 AM
drywall over old plaster... lcann25 Remodeling 0 09-20-2010 11:53 PM
Drywall or plaster wall cprao Drywall & Plaster 1 02-03-2010 03:53 PM
Drywall over plaster? Rob1980 Drywall & Plaster 10 04-11-2009 05:05 PM
Plaster and Lathe walls- covering with drywall Jrr1099 Building & Construction 4 03-24-2008 02:20 PM




Top of Page | View New Posts

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