Fog Coat Stucco –
Stucco is an ancient, even prehistoric, creating material. A lot of of the most famous ancient civilizations employed it: the Greeks, Romans, and Aztecs. The Egyptian pyramids were as soon as stuccoed too! It used to be restricted in color to the earthly components it’s created from (lime or Portland cement, sand, and water), but you can now see it in a selection of shades. Colored stucco is achieved by adding pigment to the final coat as it’s applied, producing a layer of colour about 1/8-inch thick. But what about when it comes time to update the color of your exterior, or match the old color where repairs have been created?
When You’re Applying Fresh Stucco
Unless you’re producing a fresco (like The Final Supper), do not paint fresh stucco. In fact, the floor below The Final Supper is covered with flakes of paint and the famous mural has to be often restored and repaired.
Stucco is porous and it needs to breathe. Moisture penetrates the surface and then evaporates away. When it’s installed, a waterproof membrane (tar paper, house wrap, Styrofoam, and so forth.) goes amongst the stucco and the structure of the house, so the inside stays dry.
The final pigmented coat of stucco goes on as part of the installation method, so when the stucco is done, it’s completed. If you were to paint, you’d have to wait for the stucco to dry and remedy, which can take weeks. Not only that, but the paint interferes with the breathability of the surface. Moisture can grow to be trapped in the wall between the membrane and the paint. At very best, this causes the paint to bubble, peel, and chip as the moisture forces a way to escape.
Worse than that, water can gather at the base of the wall, fostering mold and bacteria and creating rot that will eat by way of the membrane and into the structural wood.
Properly applied, the color coat of your new stucco can last for decades. Paint will not have a comparable durability and you’ll nonetheless have to paint once again in a couple of years even if you do not have a lot of issues, so it’s greater to go with the color coat ultimately.
When You’ve Got Old Stucco
What to do with old stucco depends on numerous aspects. What’s the situation of the stucco? What colour do you want? What do you want to invest? Is it currently painted?
If your stucco is in excellent shape, your best choice is to clean it with a pressure washer (not too harshly) and then cover it with a “fog coat.” This is a quite thin coat of Portland cement, water, and pigment (no sand) that covers the surface like paint, adding a layer of color that bonds to the structure of the current stucco. If the stucco is cracked, chipped, or spalled, it needs to be repaired and then recovered with a entire new colour coat.
You can only add so significantly pigment to stucco, so regardless of whether you are performing a colour coat or a fog coat, it isn’t feasible to attain extremely dark colors. If you truly have to have an aubergine house then you want to use an elastomeric coating that preserves the breathability of the surface and is versatile and robust enough to bridge tiny gaps and cracks in the stucco.
Restuccoing a house is not low cost. In the long run, it can save you money due to the fact you will most likely never have to do it again, but unless you’re a skilled DIYer this isn’t a do-it-yourself project. A fog coat will expense you less and goes on a lot less difficult. Elastomeric coatings run about the identical as the fog coat, but you have to be positive to use the right stuff. The cheapest choice is often paint, but that comes with the information that you could have to do it again in a few years.
If there’s currently paint on your stucco, you can not stucco over it. The new material will not bond to the paint and will crack and fall away in quick order. That includes stuccoing a complete wall, or just patches or repairs right here and there. If your stucco has fared well under the paint then you can paint over it. Even so, if you have any repairs to do then you have ended up in the most high-priced circumstance.
You need to sand blast the paint and undesirable stucco off the house, restucco, and apply a color coat. This is why the stucco shouldn’t have been painted in the very first location and why it is typically not advised.