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Re-Surface Nasty Rough Painted Existing Stucco Exterior Walls

Two Pump Chump

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Joined
Sep 27, 2020
Messages
106
Location
N CA
It is a California thing. The 22 yo stucco walls are in excellent shape, but they are extremely granular and rough texture. Actually dangerous to brush against, and nearly impossible clean. My search went through Home Depot, Google AI and Quickcrete web sites. Not satisfied with any of it. I want to smooth the surface, then maybe paint it if the application can't be premix dyed or stained. What does the garage empire say ? - thanks. ( I would apply myself, have pressure washer, scaffolding etc)

A specific product, product number, code or link would be very helpful rather than a generalized . . . . .. . .
 
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Yellow Jacket

Member
Joined
Apr 23, 2022
Messages
15
I don’t know about smoothing the surface. Maybe a roller grinder like you use to take rust off a car frame? check YouTube.

Had mine cleaned with a pressure washer, then painted using a roller brush. Looks brand new on 35 year old stucco.
 
OP
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Two Pump Chump

Well-known member
Joined
Sep 27, 2020
Messages
106
Location
N CA
Thanks for the replies and suggestions. No mildew. Just real coarse grain sand or similar in the spray-on stucco California wall finish. I hate it. I guess it can be overthought. What derails me are the product descriptions etc. None of them apply to my situation, they are all for tile. The stucco is essentially sand grout right ? They just pull a mixer up, spray it on the wire mesh and finish with trowels. If I dont get the answer online I will eventually try a test area and see how that works out. And then . . . . . . the HOA ^%$%$
 

Firebrick43

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Joined
May 12, 2015
Messages
13,992
Location
West central Indiana
Thanks for the replies and suggestions. No mildew. Just real coarse grain sand or similar in the spray-on stucco California wall finish. I hate it. I guess it can be overthought. What derails me are the product descriptions etc. None of them apply to my situation, they are all for tile. The stucco is essentially sand grout right ? They just pull a mixer up, spray it on the wire mesh and finish with trowels. If I dont get the answer online I will eventually try a test area and see how that works out. And then . . . . . . the HOA ^%$%$
There is synthetic stucco and there is cement based stucco, but it isn't grout. About as similar as house paint vs car paint.

Synthetic stucco is applied to foam, with a fiber glass mesh reinforcement. Cement based stucco is typically applied to expanded mesh steel lath however there is more recently a heavy duty fiberglass lath, much heavier than the mesh used in synthetic stucco.

To smooth it out you need to apply a cement bonding agent over the existing wall and apply another layer of stucco, one that is smoother than what you have.



Its not really a DIY project. Plastering takes lots of arm strength and you have to do a whole wall, both coats in a day. I can plaster an 8' x 28' wall in a day with my wife mixing but no way in hell would I attempt to do a whole side of a house.

And it takes skill, especially if going over a rough wall. More than likely the rough stucco was used on your house to hide lack of skill and wavy walls. Smooth coating will make any lumps look like hell
 
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CGT80

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Aug 29, 2014
Messages
862
Location
IE, SoCal, USA
The color coat can be sand blasted off and new color applied, if traditional stucco. Elastameric paint is thick and can help fill the pores, but takes a big airless to spray and would have to be back rolled.

Stucco holds up just fine with a proper paint job and drainage. I have painted and repainted many stucco houses in socal and my uncle did many before teaching me to be a pro. Bad paint jobs can fail and vines or plants can damage the surface and standing water or over watered planters can dame stucco, painted or not. Zinnser primer is the best, not kilz, and behr paint has held up great on many houses when used on stucco, but I have used many brands over the years.

Filling in the pores with paint does make it look better and cleaner....my walls are a bit off white, well originally a color called whisper gray. They still do get dirty. Paint it dirt color and it wont be so bad. Concrete based stucco changes color when it gets wet and is not an absolute uniform color, where paint is a solid color.

Stucco is a lot of work and while i have done lots of patching, for a few walls on my garage, I learned how to do the entire process with the lace texture, from youtube pros. Watch their videos and see how yours can be refinished, then hire someone.

As stated above, I often did scrub finish on older houses and used glue in the mix and recoated over some of mine that was painted. A pro can do that very quickly on entire walls.

There are quite a few textures of stucco and different sizes of sand. Medium or large sand mixes are common here, but look at commercial buildings and modern houses.....some have a very fine finish and some are an even sprayed or floated, or scrubbed finish with no lace.

Stucco is a great option here and it works and does not rot like wood and it is better than the old house look of siding, even though Concrete siding is a thing now. I don't know why it isn't popular across more of the USA.

Post a picture of what your's looks like.
 

Dig Doug

Well-known member
Joined
Apr 16, 2018
Messages
1,089
I recoated my stucco w/ a synthetic elastomeric style color coat
comes in a 5 gallon bucket and paddle mix in the color
Awesome product

2 coats

it flexes and doesn’t crack -Clean it w/ a pressure washer

product I used

IMG_3920.jpeg
 

Dig Doug

Well-known member
Joined
Apr 16, 2018
Messages
1,089
This Synthetic Stucco is used in areas that have extreme temperatures changes

freezing temps in winter
100 + temps in summer
 

Stuart in MN

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Joined
Sep 8, 2005
Messages
23,005
Location
Minneapolis
Painting stucco is a bad idea in my opinion. You turn a finish that is essentially maintenance free into something that will need to be repainted over and over again for the life of the building, plus it doesn't allow the stucco to breathe which can cause cracks down the line. A skim coat of new stucco, tinted to the color you prefer is better - in my part of the country it's called a dash coat.
 
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