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General Inspection Discussion This is a place for general discussion about the home inspection industry. Try to keep the posts topical, but they need not be as specific as the other areas of this board.

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  #1  
Old 6/10/10, 5:49 PM
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Default Stucco rust spots

Can anyone tell me what causes small rust spots on exterior stucco (covering a masonary wall)?
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  #2  
Old 6/10/10, 6:48 PM
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Default Re: Stucco rust spots

Metal corner bead or metal lath.
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  #3  
Old 6/10/10, 6:56 PM
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Default Re: Stucco rust spots

Random spots througout in the middle of the field would indicate moisture intrusion behind the stucco causing the metal staples that secure the lathe to rust. Pictures would be extremely helpful to help diagnose your problem.
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  #4  
Old 6/10/10, 7:14 PM
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Michael J. Meeker, CMI Michael J. Meeker, CMI is online now
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Default Re: Stucco rust spots

Quote:
Originally Posted by temmes View Post
Can anyone tell me what causes small rust spots on exterior stucco (covering a masonary wall)?

Maybe the nails were left in place after they poured the tie beam and filled the cells.





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  #5  
Old 6/10/10, 7:24 PM
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Default Re: Stucco rust spots

Good catch Mike forgot about those.
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  #6  
Old 6/10/10, 7:28 PM
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Default Re: Stucco rust spots

Finally my years of experience as a stucco contractor may have paid off. In high school it was my after school job to prep the houses for stucco.





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  #7  
Old 6/10/10, 7:33 PM
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Default Re: Stucco rust spots

Knuckle buster LOL
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  #8  
Old 6/10/10, 7:38 PM
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Default Re: Stucco rust spots

Yeah and we used to grease the windows with old motor oil and gas. mixed in a bucket. we DIPPED A FIRRING STRIP WITH A RAG TIED ON IT AND COVERED ALL WINDOWS AND FRAMES. sorry bout the caps my finger slipped. Long before they invented Window Guard. It was nasty in the Florida heat.





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  #9  
Old 6/10/10, 7:41 PM
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Default Re: Stucco rust spots

Many times Rust Spots are associated with Metal Shaving from the Mixer, or Metal Shavings-Debris in the Sand from the Plant.

But Metal Shavings regardless of where they originated from are common in Cement Stucco finishes and can make a building look like hell.
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  #10  
Old 6/10/10, 11:28 PM
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Default Re: Stucco rust spots

Woops...forgot he said it was a masonry wall when I posted.
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  #11  
Old 6/12/10, 9:20 AM
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Default Re: Stucco rust spots

Quote:
Originally Posted by sgilligan1 View Post
Woops...forgot he said it was a masonry wall when I posted.

I see lathe on painted block homes. They use the lathe when they stucco after a home has been painted. Not that unusual down here.



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  #12  
Old 6/12/10, 4:16 PM
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Default Re: Stucco rust spots

Quote:
Originally Posted by temmes View Post
Can anyone tell me what causes small rust spots on exterior stucco (covering a masonary wall)?

Now that you have read all the reasons why---PASS it on to a stucco specialist for moisture analysis PASS the liability



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