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Question DetailsAsked on 3/10/2015

how much does it cost to color plaster an exterior concrete wall?

wall is 146' long and 4.6 tall. part of the wall is retaining. The retaining part is showing lime discoloration and the stucco part is flaking.

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1 Answer


Plaster is not a good exterior finish in normal US conditions - and will flake even more than stucco, which is generally cement based.

You see the problem with stucco over an outdoor concrete surface - it will flake over time, especially if applied direct rather than over wire or perforated metal (preferable) backing.

My recommendation - high pressure pressure washing can clear off the lime buildup (and most of the stucco if you want to get rid of it too) - or do it yourself with commercial lime remover and manual scraping for the stucco, if it is actually flaking off. Sandblasting can clear off the lime also, as well as prep the surface where the stucco is coming off if you want to patch that part. Those are relatively cheap fixes.

If you want it all to look like new, I recommend removing the stucco, then sand blasting or high pressure water jet or shot blasting to the surface texture you want, followed by concrete staining by a Concrete - Stamped and Decorative contractor. Google for "images of stained concrete" and "images of exposed aggregate concrete" for examples of what you can do - whichever you go with, a good concrete sealer will reduce but not toally eliminate the lime issue, but may get it down to the point you can readily maintain it yourself with lime cleaning every year to three.

The clean and locally patch you are probably talking a dollar or two per total SF (assuming patching is less than 20% of area); remove stucco and prep surface and do exposed aggregate or staining more like in the $3-5/SF range probably. Of course, far cheaper doing most or all of work yourself. Only "hard" part is blasting to exposed aggregate, and getting exposed aggregate texture or staining consistent.

Answered 5 years ago by LCD

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