Weird Bubbles In Drywall Mud - Drywall & Plaster - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 10-31-2011, 12:29 PM   #1
A Little Of Everything
Join Date: Nov 2010
Location: Omaha, NE
Posts: 2,290
Rewards Points: 1,260

Weird Bubbles in Drywall Mud

I'm replacing some water-damaged drywall in the family room of a rental house. The sheets were installed horizontally, so I made the cut at the 48" line, installed a new sheet of drywall, taped & mudded the new seam. Pretty straightforward.

During the process, some of the mud I'm skimming on the "old" drywall has immediately developed tiny little bubbles - kind of the size of pimples. It didn't matter how many times I wet over it, they immediately reappeared. It was very random, where these bubbles appeared.

I eventually rolled on some GARDZ primer, went over it again & got on with business - so it's now done.

But what the heck was causing that? I've never had that happen before.

Did I not adequately scuff the (satin) sheen of the paint on the old drywall? Was there some sort of contaminant? If that's the case, why so random?

Just wondering what you guys' thoughts were. Thanks!


DrHicks is offline   Reply With Quote
Old 10-31-2011, 07:47 PM   #2
Join Date: Aug 2006
Posts: 1,103
Rewards Points: 530

I think most will say mudding a painted wall was the cause. I am not sure that is the only possible cause.


boman47k is offline   Reply With Quote
Old 11-08-2011, 02:53 AM   #3
Join Date: Dec 2010
Location: BC Canada
Posts: 500
Rewards Points: 500

if it was "fisheyes" - I've seen this from the mud being put on too thick, or not being mixed well. Kind of hard ot say for sure without seeing it.
chrisBC is offline   Reply With Quote
Old 11-08-2011, 05:26 AM   #4
DIY staff

Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 25,660
Rewards Points: 2,044

I've seen that over a painted surface too---rather common----Sorry I don't know why.
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is online now   Reply With Quote
Old 11-08-2011, 06:56 AM   #5
A Little Of Everything
Join Date: Nov 2010
Location: Omaha, NE
Posts: 2,290
Rewards Points: 1,260

Thanks for the replies, guys. The wall is finished and painted now - all is well.

It was just such an odd and random thing. I've seen bigger bubbles before, but these were (maybe) about 1/16th of an inch. And very random. 15-20 in one spot, then none over most of the rest of the surface.

This is a rental house that I bought 4 years ago. It had a mold problem that we eradicated. I wondered if maybe there were some lingering mold spores on the wall, but the paint I was mudding over was applied after the mold was taken care of.


Thanks again guys!
DrHicks 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
bubbles in new drywall mud gailquilter2 Drywall & Plaster 16 11-04-2012 06:40 AM
Do I Need To Strap Exterior Walls (Interior Side) Before Drywall? Dreams Drywall & Plaster 4 09-26-2011 04:37 PM
Is tape necessary to repair holes in drywall (in garage)? Scotch99 Drywall & Plaster 4 08-22-2011 01:08 PM
Matching new drywall to old textured drywall pennshaq Drywall & Plaster 1 05-23-2010 09:30 AM
Good ways to run pegboard up to drywall? upthemaiden Drywall & Plaster 1 03-09-2009 01:12 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1