Thanks soooo much for all the replies/input/ideas. I've completed a test area and it looks/seems to be working good: 1st cleaned wall with 50% bleach solution and power-washed, 2nd applied Dap Phenomenal Brands Pre-Mixed Stucco Patch from HomeDepot ($20/gal) on mortar joints/holes, 3rd applied thin coat of Dap All-Purpose Stucco Patch, again from HomeDepot ($15 for 25lb bag of powdered mix). This somewhat simple process to me is still very labor intensive and costly...but...no
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comparison to applying metal lathe/conventional stuccoing. I wish the builder would have applied 1/4" concrete/stucco mix to all exterior raw block-walls initially like he did on the front of house !!! PLEASE let me know what you think of my procedure and/or other possible SPECIFIC PRODUCTS you think might better do the trick stuccoing over painted block walls... thanks again for all your ideas... Steve :)
On the right side of pic no fill of joints, just powder mix applied...on the left, joints pre-filled (as discribed in previous post) then thin powder stucco mix applied...next I need to work on pattern...but for this test I was looking at coverage/adhesion.
Please let me know what You-All think...and, thanks again for all of HomeTalk folk's feed-back... Steve :)
Thanks Chas...I agree...now that the test area showed good adhesion over the painted blocks I now plan to: 1. clean and powerwash all blocks; 2. fill tooled joints/holes w/ 2coats of pre-mixed stucco patch (instead of 1coat like I did on some of test area); 3. trowel on (using a mason's sponge trowel) a bit thicker 1/8'' texturing coat of powder mix. This process for me is still a bit pricy and very-labor-intensive, but I think the cost/effort will pay-off with 'sweet-lookin-finished'
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walls. I will shoot before and after pics and post-em to let folks know how it went. Thanks again to alllllll U-folks out there for your help!!! And for all you new folks who may come across this thread, let me know what you think, and any ideas you have to stucco over existing painted block walls... Steve :-)
Hi Steve - as you are prepping.....get some TSP and sprinkle some in your cleaning mix...wear rubber gloves.....bleach alone will only knock down any existing mold....it won't kill it off as TSP combined will. It's not as important as you have a cinderblock house and I don't think mold can live under the stucco mix like it can under paint. Not sure it would ever be a problem with your project...but better safe than sorry. You can get TSP in the paint department of lowes or depot
Steve, After I'm done with the interior renovations in my money pit... I mean fixer upper... I'm going to use the same techniques you did on my block walls. It's looking good. Make sure to post some before and after photos. :)
I know Trina what U-mean on 'money-pit' term...and the time invovled, WoOoOoW...I'm making slow progress though...will post pics and let U-all know how the process went... Just bought two sponge trowels last night for applying dry-mix stucco finish coat. Thinking it will take me a few weeks but will continue checking back to see others comments...
'Keep UrTools Sharp -N- Ur Determination Strong' all-U HomeTalk Geniuses ... Steve :-)
Here's an up-date... I have a hiccup in my plan stuccoing over painted block exterior walls. I'm not happy with the adhesion of 'Dap All-Purpose Stucco Patch' from HomeDepot @$15 for 25lb bag of powdered mix. Power-washed it off my test area (it came off too easy for my comfort level of adhesion)!!! I now plan to use 'Dap Phenomenal Brands Pre-Mixed Stucco Patch' from HomeDepot @$20/gal for the final 1/8'' thick stucco-look texture. This Pre-Mixed stuff is what I'm using to fill tooled
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joints/holes and has super adhesion (held tight when testing it's adhesion using power-washer 3000psi approx. 12" from surface). I'll keep U-all up-dated with pics and results as I slowly make progress. Thanks again for all you HomeTalk folks across the country... Steve :)
I'm back again...still working on applying Pre-Mixed Stucco Patch...it takes a lot of time to apply but I'm happy with the results...please see before and after pics. Will need to apply a 2nd thin coat...then on to applying thin stucco texture using same Dap product. Thanks again to all of the ideas you all have posted... Steve :-)
Thanks Pam... I have never done that... does that effect long-term adhesion??? I've applied silica sand, portland, & masonry cement mix to new block walls as a texture which worked out very well... any ideas out there on adding sand to paint as a means to add texture??? I'm always open to learning more on proven construction practices... Steve :)
I've added the sand directly to the paint, mixed well, and painted on for texture on craft woodwork for out side. I have not noticed that it affects the adhesion over the long haul.
I'm back to give an up-date to all of you following this thread... it's been a slow and labor intensive process... I'm trying to upload my latest pics but can't get latest adobe flash player to work... please let me know if you have any ideas how to post my latest stucco pics... Steve
Got U on that one CP (it was pain 4-sure)... I'll try this again...fingers crossed...
Making slooooow progress... results I feel are 'GREAT' ... bunch more to do on texturing and then final painting... let me know what Ya think...Pics are in progression... thanks...Steve :)
Thanks Chas...I'm still laughing from your joke on 'problems with both of my adobes' !!! Here's the latest up-date on my successful steps of procedures:
To fully hide the block mortar joints I applied 2 coats of Dap Pre-Mixed Stucco Patch using 2" putty knife. Then mixed 1gal of exterior primmer + 1gal Dap Pre-Mixed Stucco Patch + 1gal pool filter sand and applied 3rd coat over mortar joints (feathering all edges 2" from joint) using 6" tape
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knife. Then for the final texturing applied the same 1+1+1 mix using small sponge trowel. For a uniform textured look I learned to always apply working from a wet edge. The mix sets up fairly fast when applied and if you over-work-it when its too dry the look suffers.
Lots of work, but the look...'WOW' !!!!! I'm still applying texture to remaining exterior walls, then I'll paint. ((will post more pics as I go)...Please post any ideas or comments or questions... I've learned sooooo much from all-U-HomeTalk-Folks... Thanks Steve :)
Thanks Trina... (and all U-HomeTalk folks). Transforming a disfigured block wall is a lot of work but do-able for the 'do-it-yourselfer'. The secret to me is the Dap Pre-Mixed Stucco Patch, what a tough product (@ HomeDepot). My approach for filling the block joints was like taping drywall (minus the tape) and using the Dap Pre-Mixed Stucco Patch like a drywall joint compound. I love being able to share with all of you what I learned on this project. Next I want to pour decorative
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concrete around house perimeter and then landscape. I'll be looking for advise from U-HomeTalk-Folks for this (my next project) soooooon !!!
Thanks again for all your help on the success of applying a stucco texture to a painted exterior block wall... Steve :)
Steve this was a very helpful post thank you so much. I live in Orlando Florida and my house has the wood lap look (filled in vertical cement block seams, but horizontal seams left). After prepping my wall by first using a sandpaper pad on a grinding wheel, then a wire brush to remove the existing paint/primer from the cement, finally pressure washing. I followed your advice exactly applied DAP Stucco patch, first coat I applied with the 2" putty knife. Allowed to dry (it does shrink a
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bit). Then 2'nd coat applied with the 6" drywall tape knife. 3'rd coat I feathered it out further with the 6" tape knife. Last coat I mixed 1 Gal Primer, 1 Gal pool sand and 1 Gal DAP stucco patch. I bought a 16" trowel to apply as it was easier than using the 6" tape knife. The mixture was a little runny but stuck fine. Finished it off by running a sponge over it. As Steve said overworking it hurts the texture. The sponge made the texture really pop. Came out great!
Good looking finish Dana...as you know, this takes a lot of work but after a year, my exterior walls look like the day I finished (approx. a year now). Hope these posts continue to help many more folks beautify their homes -without breaking the bank. To all you viewers who are thinking about tackling such a project, please feel free to post comments and I'll try to help all I can :-))) Steve
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Please let me know what You-All think...and, thanks again for all of HomeTalk folk's feed-back... Steve :)
You're on to something there, it's going to look really nice.
Chas.
You folks here on HomeTalk are great (just like I heard spoke of on the radio where I first heard of this great site) !!!
'Keep UrTools Sharp -N- Ur Determination Strong' all-U HomeTalk Geniuses ... Steve :-)
CP
Making slooooow progress... results I feel are 'GREAT' ... bunch more to do on texturing and then final painting... let me know what Ya think...Pics are in progression... thanks...Steve :)
That's a job for a crew of people.
A labor of love that you will enjoy the fruit of from now on.
It's looking good so far.
To fully hide the block mortar joints I applied 2 coats of Dap Pre-Mixed Stucco Patch using 2" putty knife. Then mixed 1gal of exterior primmer + 1gal Dap Pre-Mixed Stucco Patch + 1gal pool filter sand and applied 3rd coat over mortar joints (feathering all edges 2" from joint) using 6" tape ...»
Lots of work, but the look...'WOW' !!!!! I'm still applying texture to remaining exterior walls, then I'll paint. ((will post more pics as I go)...Please post any ideas or comments or questions... I've learned sooooo much from all-U-HomeTalk-Folks... Thanks Steve :)
Thanks again for all your help on the success of applying a stucco texture to a painted exterior block wall... Steve :)