As of recent many of our client have been informed that conventional stucco finishes are no long available for stucco repair, recoats or new products. I am please to say this is 100% false information and people are being mislead. Conventional stucco is available from many manufactures including Canada's very own proud manufacturer Imasco Minerals.
Stucco repair is a bit of a lost art recently with people patching conventional stucco with acrylic stucco with terrible texture a color match.
People are saying they are told that it can not be done. This is also false. Professional stucco repair companies have access to the materials to give you the exact same finish as you have on your home. (This is not to mean that the color and or the texture will be exactly the same but it can be very close.) Repairs can come in many forms and textures.
Find a professional to treat your home with the respect it deserves.
Conventional stucco repair is not an easy job but with the right materials, skill and an eye for color it can be done. Conventional stucco is a mixture of sand, cement, lime, and pigments.
After the envelope will be repaired using black paper, rubber membranes, Tyvek or other building wrap to seal and protect the sheathing (with a proper overlap and shingle lap installation) a wire mesh is installed to reinforce the repair and stop cracking and checking. Next a layer of grey cement scratch coat is applied over the wire to build up a solid base for the color or finish coat. (Installed to a 1\2 inch to 5/8 thick with the finished product surpassing 3/4 of an inch thick.) The finish coat is the last layer also know as the color coat. With an expert eye the finish coat is color matched on site to the existing finish coat color and applied, this is called the base coat. Once the base coat is semi dry texture rock is added to the finish coat along with dyed water to match the texture currently on the home or business.
Stucco takes 28 days to fully cure and color can adjust for up to 90 days.
Acrylic stucco usually comes in two forms, EIFS or Sand and cement scratch coat with an acrylic or synthetic coat.
EIFS repairs can vary depending on the installation method. Generally stucco repair requires building envelope repair, either liquid weather resistant barrier, Tyvek, or paper. The next layer is Styrofoam layer with drainage preferably but they many not have been installed with one originally. The foam is then grated or rasped before application of the cementitious layer. The cementitious coat is applied with a reinforcement mesh. The final coat of acrylic stucco or synthetic stucco. When doing these repairs the patches may be very noticeable and we recommend doing an entire panel to hide repairs.
Generally stucco repair requires building envelope repair, either liquid weather resistant barrier, Tyvek. Wire mesh is installed to reinforce the repair and stop cracking and checking. Next a layer of grey cement scratch coat is applied over the wire to build up a solid base for the color or finish coat. (Installed to a 1\2 inch to 5/8 thick with the finished product surpassing 3/4 of an inch thick.) The acrylic or synthetic stucco is color matched by the manufacturer by a sample removed form the repair. The acrylic is applied over the conventional stucco base or scratch and double coat. When doing these repairs the patches may be very noticeable and we recommend doing an entire panel to hide repairs.
Traditional masonry stucco is a cement-based plaster that is applied over walls and other surfaces inside and outside of buildings. It is made from cement, sand, and lime and hardens into a highly durable material that requires little maintenance. Like traditional decorative plaster, stucco can be troweled, brushed, or otherwise textured to create a variety of finish effects. Stucco typically is applied over a galvanized stucco wire, which helps the stucco adhere to the supporting structure and strengthens the entire assembly.
Stucco usually is mixed on-site and is applied in three coats. The first two, the scratch and brown coats consist of the traditional grey cement, sand, lime and water to give you a hard substructure to "stucco". This is broom finished or scratched to allow the next layer to bond. The third coat is a finish coat. The finish coat is dyed with mineral pigments giving the stucco a colored finish.
E.I.F.S. stands for "Exterior Insulation and Finish Systems." The product is also called synthetic stucco, and it is a multi-layered stucco finish as well. E.I.F.S. has multiple layers including a variation on the steps below:
1. A weather-resistant barrier is generally black paper, Tyvek, or a roll-on/trowel on coating applied to cover the substrate.
2. Adhesive attaches insulation board to the supporting structure. Mechanical fasteners can be used in some cases.
3. A foam insulation wither with channels or flat insulation foam board is secured to the exterior wall surface substrate, most often with adhesive.
4. A base coat, either an acrylic or polymer-based cement material, is applied to the top of the insulation then reinforced with glass fiber reinforcement mesh.
5. The reinforcement mesh is embedded in the base coat material.
6. The finish is a textured acrylic coat that's decorative and protective. This also comes in many different textures and colors.