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Old 08-28-2014, 11:13 AM   #1
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What PSI pressure washer can strip paint off stucco?


I need to strip paint off large amount of stucco, about 1,200 square feet. At this size, chemically stripping is not time- or cost-effective, and the sandblasting bids I have received are more than twice the price I would pay to BUY a monster 4,200 PSI pressure washer that I suspect would be up to the task, especially with a turbo nozzle. Given that, I am very interested in buying or renting such a unit and doing the job myself.

Does anybody know what PSI level is needed to strip a single layer of latex paint off of stucco? I'l like to avoid something unnecessarily large or that would actually blast off the stucco too! I suspect an electric 2,000 PSI washer will be too puny, but do I need 3,500 PSI? 4,000? 5,000?

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Old 08-28-2014, 11:18 AM   #2
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What PSI pressure washer can strip paint off stucco?


I'm afraid that you're going to damage the stucco. What are you going to replace the paint with?

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Old 08-28-2014, 11:24 AM   #3
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What PSI pressure washer can strip paint off stucco?


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I'm afraid that you're going to damage the stucco. What are you going to replace the paint with?
If I damage the stucco, then another coat of stucco. If not, then two coats of Keim mineral paint. That's the plan, at least.

If pressure washing doesn't make sense, does anyone know of a sane method to strip paint off of stucco?
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Old 08-28-2014, 11:30 AM   #4
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What PSI pressure washer can strip paint off stucco?


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If I damage the stucco, then another coat of stucco.
It doesn't work like that. Damaged stucco has to go off to the lathe, and then be replaced
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Old 08-28-2014, 11:34 AM   #5
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What PSI pressure washer can strip paint off stucco?


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It doesn't work like that. Damaged stucco has to go off to the lathe, and then be replaced
Really? Not even with a bonding agent and just a color and texture coat?
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Old 08-28-2014, 11:39 AM   #6
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What PSI pressure washer can strip paint off stucco?


Depends on the damage. But when I've seen stucco cleaned enough to strip paint, I've also seen cracks opened up
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Old 08-28-2014, 11:50 AM   #7
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What PSI pressure washer can strip paint off stucco?


Well I'd certainly prefer to patch cracks than redo the entire stucco wall down to lath and new scratch and brown coats
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Old 08-28-2014, 01:29 PM   #8
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What PSI pressure washer can strip paint off stucco?


Why does it need to stripped?
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Old 08-28-2014, 01:53 PM   #9
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What PSI pressure washer can strip paint off stucco?


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Why does it need to stripped?
Because I don't want the maintenance hassle and ongoing expense of repainting it every few years, nor the moisture-trapping qualities of the paint that's already on there. Because my home doesn't have a weep screed and the stucco goes all the way down into the soil, moisture occasionally wicks up after heavy rains and has caused the paint to peel along the bottom few inches (below the sill plate, thankfully). Since it's already peeling there and looking terrible, and it's clearly a systemic problem, I want to get rid of all of the paint for good to additionally restore the stucco's natural breathability. Painting stucco turns a maintenance-free cladding into a maintenance nightmare cladding and I don't know why anyone does it.
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Old 08-28-2014, 05:21 PM   #10
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What PSI pressure washer can strip paint off stucco?


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Because I don't want the maintenance hassle and ongoing expense of repainting it every few years, nor the moisture-trapping qualities of the paint that's already on there. Because my home doesn't have a weep screed and the stucco goes all the way down into the soil, moisture occasionally wicks up after heavy rains and has caused the paint to peel along the bottom few inches (below the sill plate, thankfully). Since it's already peeling there and looking terrible, and it's clearly a systemic problem, I want to get rid of all of the paint for good to additionally restore the stucco's natural breathability. Painting stucco turns a maintenance-free cladding into a maintenance nightmare cladding and I don't know why anyone does it.

Stripping the paint sounds like a drastic measure, why not install a weep screed and be done with it, heres a link that may help.


http://www.iccsafe.org/iccforums/Pag...d=14415&page=1
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Old 08-28-2014, 05:40 PM   #11
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What PSI pressure washer can strip paint off stucco?


Can't you just have someone put a color coat of stucco over it. Like a skim coat of colored stucco.
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Old 08-28-2014, 06:18 PM   #12
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What PSI pressure washer can strip paint off stucco?


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Can't you just have someone put a color coat of stucco over it. Like a skim coat of colored stucco.
Over the paint? I worry about how long that's gonna adhere for.
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Old 08-28-2014, 07:50 PM   #13
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What PSI pressure washer can strip paint off stucco?


I don't know of anyway possible to strip it without damaging the stucco. Stucco is a very porous substrate the paint is deep in it I'm sure.
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Old 08-28-2014, 08:32 PM   #14
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What PSI pressure washer can strip paint off stucco?


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I don't know of anyway possible to strip it without damaging the stucco. Stucco is a very porous substrate the paint is deep in it I'm sure.

That's what I was thinking. The paint is peeling in places, but in other places its probably stuck like chuck.

Trying to blast it off with a turbo nozzle doesn't sound like a great idea. Pressure washing alone almost never works for stripping paint.
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Old 08-28-2014, 08:34 PM   #15
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What PSI pressure washer can strip paint off stucco?


Well, if it's all but impossible, then I'll bow to reality. Darn.

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