How do I patch a hole in the stucco?

The patch is to plug/cover a through-hole originally cut to accomodate a stove top vent. The contractor put the wrong wall cap cover, in the wrong place! I mounted the correct one in the correct place, but that left a 12 inch by 12 inch hole through an exterior wall which needs patching - PROPERLY.
The google search only turned up cracks and large area repairs but no through hole repairs.
What is the proper way to fix this hole?
The wallconsists of 2x6 studs filled with fibreglass fluff 1/2 inch sheathing two layers of tar paper 1/2 inch styrofoam chicken wire and three coats of stucco
Total thicknes from sheath out is 'supposed' to be around 1 inch but is skimpy at 7/8
Luckily I had access to the inside of that hole and used KwikSeal to stick a square 1/4 plywood like board over the inside and screwed to the surrounding sheathing. Thus the hole is bug sealed. and almost water sealed.
My concerns: monsoon rains hit this wall - I need it sealed well. The sun hits this wall - AZ sun is a bit brutal.
Then I need to find out how to properly seal around the new vent cover, too. It's well made. With flashing that extends out. As temporary, I simply used Kwik seal around the mating surface and screwed it to the sheathing.
For what it's worth, when I cut the new [and slightly larger vent hole] I did it very cautiously and saved the square piece, almost intact. That includes the 1/2 inch sheathing material. Should I cut any of these pieces down and use them, or should I absolutely use only new materials to patch the old hole.
Also, how does one match the texture? Stucco on the surface looks like tiny rocks are embedded in the mortar. Is this something standard, or a skill that requires expertise beyond belief?
Oh, yeah, these holes are just above head height, so the patch should look decent.
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Robert Macy wrote the following on 8/27/2012 9:57 AM (ET):

Have a stucco installer repair the hole. Don't worry about the matching of the patch to the surrounding stucco because you are going to put an exterior decorative Native American plaque over it.
--
Bill
In Hamptonburgh, NY
  Click to see the full signature.
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Thanks for the detail about the overlap. Things like that, once known, come under the heading of "Of course! DUH!" but note that 'once known'
I'll try the video, but don't hold my breath. videos don't work so well.
Handyman?! Hmmm. From the work I've seen;I do about 100x better.
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rats! youtube won't give me the video. nothing happens there, just sits saying done.
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Must be your machine...youtube link works fine for me even on my locked down corporate machine.
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But, *IF* I get a copy I can easily view it.
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Here...you can get a copy at this link... ;-)

http://www.youtube.com/watch?v=1RhumFrsSX4&playnext=1&list=PL225BE7D9

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That URL takes a long to 'redirect' but when it does it takes me to the same video Oren posted - with the same effect. NOTHING HAPPENS! Youtube won't let me have, nor view it.
Is ok. Just got off the phone with Kirk Giardano who made the video with his son. He is emailing it directly to me. He was very helpful with some more details. Look forward toviewing them. Will post back here later.
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You must have missed the smiley.
The link I posted was the exact same link that you couldn't get to before.
You wanted a copy, so I posted a link where you could get a copy - if you could get to the site.
See how funny I am? I crack myself up!
BTW...I'm glad you got the video's you needed. let us know how the project comes out.
If it were me, I doubt I could make the repair match even after watching the video. Seems to me that if you don't flick the brush with the same amount of water or the same strength or at the same angle, you won't get a matching surface. Even if I didn't have the "water flicked" surface, whatever surface I did have would be "personalized" by the technique of the installer and would be hard to match - at least for me.
In any case, good luck!
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Your reasoning related to the use of the water was incorrect as a result of playing the video without sound.
I think you may have missed more than just that point by not listening to the teacher.
He gave the finish a specific name: a Dash finish, and he explained how to apply it.
I think you are doing yoursef a disservice by not listening to the sound.
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Agreed. Firing up thw WinXP to view it - it has sound. Will see what I missed.
Still don't understand why his URL's got me the videos and everybody's here did not, Even that Brad video didn't come in.
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WOW! just watched all four videos WITH sound. Picked up a lot. Especially the bonding compound he kept painting onto the overlap surfaces. And the MOST important fact: Stucco is NOT waterproof. That's why you seal with paper underneath.
I don't know why he put on the paper slipping it underneath the overhead paper then would staple it to the studs, because that obviously violates the seal and provides a hole for water running down the paper to run inside. But, if that's not important it does answer the question of how to overlap at the edges - it's not important. He did use a half tube of polyurethane to seal a small vent hole with a round piece of paper. No staples, looks like the right way to do it.
Thanks to everybody who offered help on this one. I found great resource in Krk Giardano's "How to Stucco ..." videos.
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Oren,
Thanks, but your original URL got me to the youtube site, It's just that nothing happens once I'm there. black/blank screen and no bits are exchanged. See my reply to derby... Kirk Giardano is sending me three videos direclty, so I'll post back here later.
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Oren,
Kirk just sent me four URLs of videos at youtube the first one <
http://youtu.be/0B2uRxKjfhg

http://youtu.be/0B2uRxKjfhg
for some reason these work ok, just take some time This first one patches a large airconditioner hole. BIG! Kirk said he fixed the sound problem when his son bought a windproof microphone.
Here all all of the videos if others are interested: <
http://youtu.be/0B2uRxKjfhg

http://youtu.be/0B2uRxKjfhg
<
http://youtu.be/yBz9_21D8Wo

http://youtu.be/yBz9_21D8Wo
<
http://youtu.be/x1z4wjlAIro

http://youtu.be/x1z4wjlAIro
<
http://youtu.be/EpewtuYhSM0

http://youtu.be/EpewtuYhSM0

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Now I'm curious why his links to the videos got the videos, but everybody's here did not?
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In article

3 coats of stucco is 3/8"??
--
charles

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On Aug 27, 5:25pm, snipped-for-privacy@earthlink.net (Charles Bishop) wrote:

more like 7/16 with 7/16 underneath.
scratch coat appears to be almost 1/4 inch, then the next coat is almost 1/8 and the final texture coat appears to be more like 1/16.very thin. looks almost like paint with 'gravel' in it.
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The foam is to fend off Arizona weather. Dry heat! well sometimes dry.
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Find a stucco installer and ask him/her if you can watch for a few minutes. Most folks are happy to pass on their knowledge, especially if they know that you won't be hiring them, but quite likely will make recommendations to others.
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wrote:

Interesting idea.
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