Stucco or a render is a binder commonly used in decorative walls and ceilings. Stucco is often used to cover up unattractive surfaces such as adobe or cinder blocks. The most common composition of stucco is a mixture of sand, cement, water and lime. Other manufacturers induce fibers and acrylics to make the stucco more flexible and stronger.
Over time, stucco can show evidence of cracks. Do not panic. As stucco is used more for decorative purpose rather than to add significant support in your house, you can easily delay repairing the cracks.
At the first sign of a crack, check the whole area for other visible cracks or holes. Now is the best time to inspect the area so that you can perform the needed repairs all at the same time.
Inspect the color of the stucco. As stucco can add a rustic or vintage look on the area, the color may vary over time. Natural stucco color tends to change as time passes by. For painted stuccos, the task will be easier for you. Take a small portion of the natural stucco to your preferred supplier to find out the exact match for your patch-up. At times, color matching can be extremely difficult, consider painting the whole area with a similar paint.
Caulk is a sealant that can be used to close the gaps in your stucco. Prepare some caulk so that you can fill in the cracks and holes. Caulk is available in most hardware shops. Ask about the proper application of the purchased caulk as the process may differ depending on the specific brand. There are caulks that are specifically manufactured for patching-up stuccos. Inquire about it so that you can purchase this type instead of a regular caulk.
Apply the caulk in the areas that need that patch-up. You have to go through all the cracks and holes to repair them properly. Use a sandpaper to carefully sand the area for a smooth and even finish.
You can use a chisel, a sledge and a hammer to remove the stucco leftover before you start applying the stucco caulk. Clear the area so that you can apply the fillings more efficiently. Once you have cleared the area, then you can start mixing the stucco.
Remember to protect yourself from significant burning as the lime content of stucco can burn your skin. Wear proper gears such as hand gloves, overalls and protective eyewear.
Prepare the stucco mixture. The ratio of masonry cement and clean sand must be 2:7. Add water so that the mixture can hold the shape. Apply water on the area where you intend to repair. The base coat must be applied to at least a quarter of an inch around the damaged area. Leave the base coat for at least two days before you apply the second coat.
Remove the high or uneven areas by dragging a board back and forth on the surface. Use a wood float to smoothen the area. Allow another two days for the second coat to dry. The finishing coat composed of masonry cement and sand mixed with ration 5:7 must be applied with a creamy texture.
If you intend to use paint to coat the area, select a matching paint to
conceal the repair. If you are scared of handling an antique stucco
décor on your house, call in a professional to prevent further damage.