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Corner bead problem

11K views 24 replies 10 participants last post by  elliot 
#1 ·
It's strange, I don't think I've seen this before in a 10 year old house, many of the windows in this house have the mud coming off the corner beads. It looks like an adhesion issue. My guess is the builder used the wrong type of mud, or the corner beads were real dusty. You guys seen this issue often?
 

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#2 ·
I've seen that many times before. It usually looks like the metal has oxidized.

To repair it: I remove any mud that will come off> spray the areas with a can of Kilz> fiber tape > first coat hot mud and then AP. Unless it's only a couple corner beads to repair. :thumbsup:
 
#3 · (Edited)
They may have ran the bead with hot mud. It has a poor bond to metal .

If It's just the bead around the window wraps ..Could be a moisture issue ..The wood and board gets wet then drys out causing the wood and board to shrink then the bead to crush in ..Which causes the mud to pop loose. We call it bead crush.
 
#4 ·
I considered it might be a moisture related issue. It's on almost all of the windows to some extent. The outside stucco is sound no cracks. The home owner wants me to trim out all the windows with jams and casing. I don't want to cover up any potential moisture problems. I guess I have to pull off some drywall and look for tell tale sings...
 
#6 ·
Window frame gets cold, condensation, wallboard wicks it out, eventually compound starts to fail.

Used to get that on new builds. Then got the DW guys to hold the board off the vinyl 1/8". The painters caulk dw to window frame during prep.

It's not a cureall. Get enough humidity from a humidifier in winter up here, and visible moisture can still show up.
 
#8 ·
It's a bead issue. A mother load of 1980's homes here have that problem.
I'm working in one right now. Multi million dollar. This whole high end development all have that bead issue.
We've gone through entire homes scraping all the mud off 100% of the beads.
The painter is removing three rooms of wallpaper as we speak. I'm praying they don't peel all the mud off as they do it. ( I may be calling Paul to come down and help me out!)

And no, it's not a hot mud issue, cold or moisture related. :no:
 
#22 ·
I don't care much for the shiny 90s Tho I still use them from time to time .

The last batch I used was against my will.. Phillips bead.. [i won't get into why]

I placed a 40'' piece in the bottom of a stairwell and coated it with blacktop a/p . So I could set the planks up ..The next day It looked like the OPs bead ..The mud popped right off. I was like:blink:

I checked out the stack of bead and, yes they were greasy . I tacked them on then took a piece of 120 sand paper in a fold and gave them a quick cleaning . That was 3 months ago ..I dropped by that home last week and everything looked good . Whenever I'm forced to use the shiny 90s I tape the flange with paper tape .

Last fall I did a basement for a H/O that hung his own board and nailed on the bead ,,He coated a few bead and tried to tape a few seams with mesh of course !!! Then he gave up!! And called me. He was /Is an agriculture teacher at the local high school So I Schooled him!!!:laughing: He had 2 buckets of that L/W crap sitting in floor .. I didn't notice till I started tearing out his mesh and setting his tribillion screws that I noticed the L/W On his bead was pealing off..All I had to do was thump the bead with my finger and The mud just fell off.. I scraped the mud off and gave the beads a quick sand cleaning and my black top stuck just fine .. I blamed it on the L/W mud ..But thinking back I know He got his bead from the same supply that I deal with. I guess the greasy bead ain't a myth ...Not That I've seen this problem before ..It's new to me...And I've tacked on about 10,000 miles of shiny 90s And never seen mud just fall of like I have recently .

My bead of choice is the USG B1 Superwides . You can run them with A/P Or Hot mud Both will stick just fine ..The other advantage to P/F Bead is no edge cracks or fastener pops .


Drywall has many avenues tho!!!! You can take a home with the perfect conditions and have It loaded with a batch of rock that the supplier placed on the boom from the day before Without covering it ...Delivered in a rain storm ...? Attached to a wet green frame..? When I walk out the door some idiot walks in with a propane water hose heater and burns the house..?

I went back to one home to fix screw pops after the homeowners lived there for 18 months after never having any issues till the hardwood floors started opening up. The floor guy told them it was a lack of moisture ...So they bought two huge humidifiers and place them in the basement and ran those damn things till water was dripping off the floor joist!! The floors closed up! The floor guy was right ...:rolleyes: But the sheetrock went to chit . ALL the screws popped ..all the bead crushed in..All the seams peaked.. And this was a 2 story 2000 sg ft home .
 

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