Moldy Drywall - Painting - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 03-25-2009, 06:38 PM   #1
Join Date: Aug 2008
Location: coastal georgia
Posts: 378
Rewards Points: 264

moldy drywall

I am remodeling a bathroom-total gut and re-do. There was a water leak around the tub and the water got up into the drywall in the next room. When I pulled all the drywall out and could see the back of the drywall in the adjoining room it is moldy and discolored.

What to do with this? Can I do some cleaning and maybe prime the area?



7echo is offline   Reply With Quote
Old 03-25-2009, 07:30 PM   #2
Matthewt1970's Avatar
Join Date: Sep 2008
Posts: 1,829
Rewards Points: 1,098

The drywall is more than likely compromised on both sides of that wall. Pull the drywall atleast one stud past the infected area on both sides of the wall. Use bleach on any suspect framing. Use a fan to help dry out that area.


Matthewt1970 is offline   Reply With Quote
Old 03-27-2009, 07:21 PM   #3
Drywall contractor
Join Date: Jul 2008
Location: Lilburn, GA
Posts: 2,129
Rewards Points: 1,070

If the backing paper on the drywall is "moldy and discolored" it has likely separated from the "core" of the board, which affects the integrity (strength) of the board. As Mathew recommended, removing and replacing the affected area is the only way to properly repair it.
If you can read this, thank a teacher. If you can read this in English, thank a soldier. Support our troops.
bjbatlanta is offline   Reply With Quote
Old 03-28-2009, 06:48 AM   #4
Join Date: Jun 2007
Posts: 553
Rewards Points: 506

I'd also replace the moldy drywall. Sure, you could treat it with bleach, but it's structural integrity is in doubt and, if you are already hanging drywall, I don't see that some work on the opposite wall will be that much additional hassle.

sirwired is offline   Reply With Quote
Old 03-28-2009, 08:53 PM   #5
Join Date: Aug 2008
Location: coastal georgia
Posts: 378
Rewards Points: 264

Thanks for the comments-

The drywall in question is in a bathroom and behind a vanity. It will be a big mess to pull the trim, vanity, tile, etc to get to the front side of the drywall. I know I will eventually do that, but would like some options until I get to that bathroom.
7echo is offline   Reply With Quote
Old 03-29-2009, 10:03 AM   #6
Join Date: Dec 2008
Posts: 70
Rewards Points: 75

If everything structurally is ok bleach will clean the mold off the exposed sites. What bleach doesn't do is kill the mold spores that live in the paper. Look for a product called Moldex. It comes in varing forms for cleaning and is designed to kill the spores. Also when you replace your drywall find a dealer that carries the mostureresistant mold defense board. Most mfg's of drywall are actaully not producing regular water resistant anymore with out the mold inhibitive attribute added.
BMDealer is offline   Reply With Quote
Old 03-29-2009, 10:16 AM   #7
Tired, Cold, and Damp
slickshift's Avatar
Join Date: Aug 2005
Location: Cape Cod
Posts: 3,089
Rewards Points: 2,000

Me too

Ayup and add another to the other replies

Removal and replacement of sheetrock in the affected areas, with fungicides and shellac sealing as/if needed on framing

If it's a relatively light/new contamination, and the structure of the drywall hasn't been compromised, you might be able to kill the mold with a mildecide, then seal it with a shellac, and at least halt that contamination
slickshift is offline   Reply With Quote
Old 03-30-2009, 01:53 PM   #8
That's Not My Job
StarsOnly's Avatar
Join Date: Mar 2009
Location: Sacramento, CA
Posts: 5
Rewards Points: 10

I echo what the others have said about removing the drywall to a safe point past the infection. The cost in health and eventual 'must do' repair is greater than what it would be now. Children can be especially vulnerable to molds.

Stachybotrys, or "Black Mold" can be really nasty sometimes and loves the environment of damp wall materials. When I did the remodel of the upstairs bathroom they use backer board for the new shower walls that were then covered in slate tiles, as well as the floor that is also done in slate.

Some of the other folks might feel this is overkill or not the best solution and I'd take their advice, this is just my own preference.

StarsOnly is offline   Reply With Quote
Old 04-03-2009, 12:13 AM   #9
Join Date: Nov 2008
Location: Michigan
Posts: 138
Rewards Points: 75

Mold is a serious issue.
As a middle-aged man, I once lived in a CA appartment with mold spots popping through the bathroom paint, and would wake up choking and not able to breath.

There were some other contributing issues such as a back injury/acid reflux/smoking/etc... which at the time I thought were the contributing factors, but in retrospect the mold might have had something to do with it. No doubt this would be a problem for the children and/or elderly.

Known mold issues might also haunt a sale years later. Better to do it right and get rid of all of it now.
Stillwerkin is offline   Reply With Quote
Old 04-03-2009, 03:59 AM   #10
747's Avatar
Join Date: Feb 2005
Location: Illinois (kankakee county)
Posts: 1,349
Rewards Points: 534

Tilex mold and mildew remover. Just spray and walk away. It will all disappear. Make sure you open the window. It is strong stuff. They carry it at my dollar general store. Look in the clean the bathroom section. Its next to the ajax in mine.


747 is offline   Reply With Quote

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
Superior Walls - Floating Corners & Drywall Woodcutter Drywall & Plaster 16 04-22-2011 12:05 PM
Drywall ceiling: Water Damage, looking for advice dawho1 Building & Construction 11 09-13-2010 10:05 AM
Old ceiling replacement idsp General DIY Discussions 12 07-25-2009 10:48 AM
Good ways to run pegboard up to drywall? upthemaiden Drywall & Plaster 1 03-09-2009 01:12 PM
Framing and Drywall questions haysdb Building & Construction 5 11-04-2005 07:11 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1