How To Fix This Bad Plaster Patch? (Pics) - Drywall & Plaster - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 03-05-2010, 01:54 PM   #1
Member
 
Join Date: May 2009
Posts: 108
Rewards Points: 75
Question

How to fix this bad plaster patch? (Pics)


Hi,

I've noticed that there a couple of areas in this living room where there appear to be white patches within the plaster ceiling. I'm wondering if the previous owners used joint compound to patch a couple areas? Originally, I thought it might have been water damage, but it haven't noticed it getting any worse.

I picked at one of these with a putty knife, and it was very brittle and had an "ashy" feel to it. I'd like to fix this before painting the room.

What's the correct to fix it? Should I try to remove what I can and then patch it with Durabond? In the third image, there is a good like area that is like this.

Thanks.





Advertisement

HautingLu is offline   Reply With Quote
Old 03-05-2010, 06:19 PM   #2
Member
 
Join Date: Jul 2007
Location: Jacksonville, FL
Posts: 886
Rewards Points: 500
Default

How to fix this bad plaster patch? (Pics)


Great pictures A++.

ashy? could this also be described as caulky? soft to the touch?

if so, odds are this is old water damage. Roof leaks need to show up somewhere.

4th pic looks like they used mortar or portland & sand rich (scratch coat plaster) to patch a hole?

Best fix: back cut to reverse 45* plaster a few inches past visable damaged area.. re-apply new plaster as required. Let this cure ( 30 days)
before painting.

Other quicker fixes are available... but may risk not being long term 100% successful.

Advertisement

Big Bob is offline   Reply With Quote
Old 03-05-2010, 08:27 PM   #3
Member
 
Join Date: May 2009
Posts: 108
Rewards Points: 75
Default

How to fix this bad plaster patch? (Pics)


Quote:
Originally Posted by Big Bob View Post
Great pictures A++.

ashy? could this also be described as caulky? soft to the touch?

if so, odds are this is old water damage. Roof leaks need to show up somewhere.

4th pic looks like they used mortar or portland & sand rich (scratch coat plaster) to patch a hole?

Best fix: back cut to reverse 45* plaster a few inches past visable damaged area.. re-apply new plaster as required. Let this cure ( 30 days)
before painting.

Other quicker fixes are available... but may risk not being long term 100% successful.
You know I'm not actually sure what they used to originally patch it. I thought that was the original lathe and plaster, except they might have put some joint compound in certain areas.....like you said, possibly past/current water damage.

By ashy, I mean that it looked like it would crumble really easy. So when I hacked it a bit with the putty knife, it came off more in white powdery dust, not in chucks.

What do you mean by "back cut reverse 45*" ? I need a translation to layman terms Would Durabond be an acceptable patching material?

thanks.
HautingLu is offline   Reply With Quote
Old 03-05-2010, 09:08 PM   #4
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

How to fix this bad plaster patch? (Pics)


Back cut reverse -- As you cut away the loose plaster, angle the saw blade up
and away from the dead center of the hole. This way the hole, if it were to be
measured on the top surface of the ceiling material, measures slightly larger across
(perhaps by 1/4 to 1/2 inch) and the patch will be less likely to fall completely
out of the hole.
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 03-05-2010 at 09:12 PM.
AllanJ is online now   Reply With Quote
Old 03-05-2010, 09:58 PM   #5
Member
 
Join Date: Jul 2007
Location: Jacksonville, FL
Posts: 886
Rewards Points: 500
Default

How to fix this bad plaster patch? (Pics)


AllanJ described the back cut reverse very nicely.. thank you AllanJ.

Fact is you really won't know what you will need to make the proper plaster repair until you chase the damaged plaster. What type of lathe do you have? Has the scratch coat been damaged?

Durabond makes a number of products, bonding primers & compounds for drywall and plaster. What you will need will depend on what you have.
Locate a good drywall / plaster supply house and take some samples from your demo and pictures with you.. some good counter help should be able to help you get what you will need.

again don't rush the painting if you restore with plaster (recommended)..
Cure time should not be ignored. If you rush it... the paint will never look right and you will turn your restoration into a patch job you will see forever.

Last edited by Big Bob; 03-05-2010 at 10:01 PM. Reason: spell AllanJ's name correctly
Big Bob is offline   Reply With Quote
Old 03-05-2010, 10:02 PM   #6
Member
 
Join Date: May 2009
Posts: 108
Rewards Points: 75
Default

How to fix this bad plaster patch? (Pics)


Thanks for pointing me in the right direction

Advertisement

HautingLu is offline   Reply With Quote
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
Venetian Plaster FYI Plaster Ayn Painting 10 07-01-2010 12:26 AM
Right materials to patch plaster on masonry? jimhome Remodeling 3 06-08-2009 12:23 PM
Plaster Walls - Did I screw up? jamiedolan Building & Construction 5 11-07-2008 01:10 PM
Skim coat for damaged plaster walls slapdash Remodeling 4 10-14-2007 06:27 AM
Need help please asap...patching plaster pics attached mood Building & Construction 2 07-30-2005 11:06 PM




Top of Page | View New Posts