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 02-12-2012, 02:46 PM   #1
Member
 
Join Date: Apr 2011
Location: San Diego, CA
Posts: 34
Share |
Default

Drywall Crack Diagnosis


I purchased my 20 year old house 6 months ago and it is time to repair and paint the living room. I request advice from expert DIYers on diagnosing the cause of drywall cracks. The drywall cracks pictured may be a result of water damage. The attached photo shows the transition from wall to ceiling; the ceiling seems lighter in color but they are in fact the same color.

The photo shows discoloration near the vertical and horizontal wall edges as well as drywall cracks 1) on the bull nose corner; 2) on the ceiling kind of parallel to the wall; and 3) on the ceiling parallel to the corner bead transitioning two different ceiling angles. The discoloration may be caused by a poor touch-up paint job or water damage. I donít know what would cause cracking at the tip of the bull nose corner bead (1); water damage? The ceiling crack (2) seems to be a stress crack? Again, maybe water damage? The crack (3) may be the corner bead edge lifting? The photo doesnít show it, but this crack continues along most of the 10í long joint. Now, does anyone have any ideas what could be causing these cracks?

The roof above the suspected water damage had issues; the flashing within a valley was clogged with debris because the cement tiles were too close together, so they were trimmed. This may or may not have caused a roof leak during one of Southern Californiaís rare cloudbursts. However, there is no other indictors of water damage except for the cracks and discoloration. There is no attic access.

I guess the first thing I must do is determine if the drywall sustained water damage. Would I do this by checking the firmness of the drywall by sticking an awl into it? I donít want to start ripping up drywall, do I?

If crack (2) is a stress crack, I can just repair it by cutting out the crack, taping it and filling it, right? Should I remove all material around the edge of the (3) corner bead and fasten down the beadís edge better?

Anyway, any assistance on one or all of these issues would be appreciated. Thanks.
Attached Thumbnails
Drywall Crack Diagnosis-drywall-crack003-copy.jpg  

lkstaack is offline   Reply With Quote
Old 02-12-2012, 02:51 PM   #2
Framing Contractor
 
Join Date: Feb 2009
Location: NE Ohio
Posts: 1,054
Default

Drywall Crack Diagnosis


That looks like a crack from the house settling. Pretty good shape for 20 years old. There does seem to be a little discoloration there as well. You could definitely poke around a bit since you need to take care of the crack anyway. I bet the leak was very small and the crack allowed it to seep in a bit. Probably easily repaired.

sixeightten is offline   Reply With Quote
Old 02-12-2012, 07:21 PM   #3
Member
 
Join Date: Aug 2006
Posts: 1,088
Default

Drywall Crack Diagnosis


What is the width of that wall? Any chance it has a narrow strip for the last piece of drywall?

I just noticed crack #2 is about the same distance from the wall. I also noticed the water stains a little more clearly.

Water prob affected the mud in the corners making it crack. The distance looks about right to me.

Last edited by boman47k; 02-12-2012 at 07:24 PM.
boman47k is offline   Reply With Quote
Old 03-09-2012, 12:16 PM   #4
Member
 
Join Date: Apr 2011
Location: San Diego, CA
Posts: 34
Default

Drywall Crack Diagnosis


I request advice: should the newly exposed edging be tacked down prior to re-taping and plastering? How do I do it? As you can see, there isn't any holes to put a screw through.

I removed the plaster from around the crack. I found:

1. It had been repaired before. The repair which consisted of mesh tape and joint compound was separating from the original plaster.

2. The original drywall was not flush with the original bullnose edging.

3. The original edging was not mounted with nails/screws. Was it pushed into joint compound? The ceiling edging doesn't use nails either.

4. The original drywall tape did not cover the gap between the edging and drywall, it was tucked under the edging. Why?

5. Alot of joint compound was used to fill the large crevice between the drywall and bullnose edging.

In order to repair this, I assume that I must 1)ensure the edging doesn't move, and 2) use drywall tape between the edging and drywall. I'm not certain of the correct way to keep bullnose and ceiling edging from moving and if joint compound is good for filling a crevice about 3/16" thick. I could sure use some advice.

EDIT: I found nails holding down one side of the bullnose edging and nails on both sides of the ceiling edging. However, I still haven't found evidence that drywall tape was used between the drywall and edging.
Attached Thumbnails
Drywall Crack Diagnosis-crack-1.jpg  

Last edited by lkstaack; 03-09-2012 at 12:27 PM.
lkstaack is offline   Reply With Quote
Old 03-10-2012, 10:17 AM   #5
Member
 
Join Date: Apr 2011
Location: San Diego, CA
Posts: 34
Default

Drywall Crack Diagnosis


I have removed the joint compound around all of the cracks, screwed down flexing corner beads (I made holes in the metal where if there were none at flexing areas), and applied mesh tape and new joint compound. Although I now know that drywall tape is not usually used between drywall and edging, I hypothesize that much of the cracking was due to the thickness of the joint compound around these joints (1/4" thick at some locations).

I hope that the use of tape will strengthen the thick application of joint compound and prevent future cracks, because I don't want to have to do this again.
lkstaack is offline   Reply With Quote
Old 03-11-2012, 04:20 AM   #6
Member
 
Join Date: Dec 2010
Location: BC Canada
Posts: 500
Default

Drywall Crack Diagnosis


If you are using mesh tape and use regular ready-mix joint compound, you are running the risk of cracks down the road. Mesh tape should always be coated (first coat anyways) with a setting type compound (powdered that is mixed)...

Just FYI

Last edited by chrisBC; 03-11-2012 at 04:23 AM.
chrisBC is offline   Reply With Quote
Old 03-11-2012, 08:54 AM   #7
Member
 
Join Date: Apr 2011
Location: San Diego, CA
Posts: 34
Default

Drywall Crack Diagnosis


Quote:
Originally Posted by chrisBC View Post
If you are using mesh tape and use regular ready-mix joint compound, you are running the risk of cracks down the road. Mesh tape should always be coated (first coat anyways) with a setting type compound (powdered that is mixed)...

Just FYI
Thank you for your advice; this is the first time I've patched this much drywall, so any word of experience is helpful. As it happens, I am using Westpac Fast Set 40 setting type compound. It's supposed to set in 40 minutes, but some of my patches are so deep it's taking several hours.
lkstaack is offline   Reply With Quote
Old 03-11-2012, 09:45 AM   #8
Member
 
Join Date: Feb 2012
Location: Utica, NY
Posts: 514
Default

Drywall Crack Diagnosis


Just becasue it says 40 minutes, doesn't mean it sets in 40.

For repairs and small jobs I always use 20 minute mud. Mix small amounts and keep putting it up until you are done.

The 40 min. will help make this a permanent repair.

framer52 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
First-timer drywall install-LONG- Axhammer Drywall & Plaster 8 04-17-2011 09:02 AM
Cracks in 10 yr old house drywall tenthirtytwo Drywall & Plaster 9 03-15-2011 11:33 PM
Drywall hairline crack after taping stryped Drywall & Plaster 10 01-17-2011 02:31 PM
Bathroom drywall question... StevePax Remodeling 9 01-08-2010 02:30 PM
Good ways to run pegboard up to drywall? upthemaiden Drywall & Plaster 1 03-09-2009 01:12 PM




Top of Page | View New Posts

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