Bricks, Masonry, Asphalt and Concrete - Proper mixture for stucco

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View Full Version : Proper mixture for stucco


A Brewer
02-19-02, 07:44 PM
Hello,
I would like to know what is the best mixture to use for stucco.
4 sand,1 cement,1 lime. I appreciate any and all information,thank you in advance.


nucman
02-21-02, 03:18 AM
The mixture you describe sounds like a sandy version of brick mortar, which is 3 sand, 1 cement, 1 lime. I usually buy stucco pre mixed in 90 lb bags, with color already added (use the color charts to choose) and you just add water. It may be a little more expensive than your home mixed system, but much more reliable.

enjoy, Nuc

A Brewer
02-24-02, 08:57 PM
Thanks for the info,
I've tried pre-mix before but it never seemed to quite cover the area that it said it would,the amount of area that they claimed it would cover was greatly exagerated.This was a bag or two of pre-mix cement and i was really disappointed.On my stucco I went to 3 sand ,1 cement and 1 lime and it's alot better.


nucman
02-25-02, 03:50 PM
Glad the new mix worked out. The rule of thumb I use for pre mixed stucco is 100 sq ft per 90 lb bag. I usually have a little extra with this.

Enjoy! Nuc

Ken Valerius
03-07-02, 11:02 AM
When mixing cement to do stucco, make the mix as dry as possible. I have found that a drier mix than one would think will stick, and the dryness causes the mix to have less voids and to crumble less easily when cured; as well as being stronger. When the finish looks the way you want, cover with plastic, to cause cement to cure slower... the slower concrete cures the stronger it is. You also need to spray the surface with water to slow the curing; but only after it begins to cure. Wait at least 30 minutes after original start (mix) time. If you spray too soon, the cement will separate, causing breakdown and the finish will suffer. The trowell trick is to slap a glob onto the wall (clean, smooth and dry wall, preferably) and make sure not to disturb the seal of that area as you work the surface, and when adding more cement. You need to do stucco in layers: first layer needs scratch lines (done with a nail in wet cement) for the second to stick to. The second will bring the wall out to ALMOST the level of the finished wall, the third and final layer is the 'appearance,' layer and needs to match the finish layer exactly. Any difference in final look will be obvious, due to the shadow lines created by stucco. Practice getting the finish to look right on a piece of plywood until you can make your end product look just right before completing the final layer. You will not be sorry.