Method 1 of 2: Mix the stucco until it forms the consistency of thick mud. Space the ties as required by masonry courses. Manufactured stone veneer is a version of hardcoat stucco where the top coat is replaced with an embedded thin stone veneer ( Photograph 3 ). Figure 2 - Stucco is installed over rigid insulation, which is installed over a drainage plane consisting of a drainage gap and building wrap layer over the sheathing. Plywood siding is available in large sheets of 8 feet long or longer, so installation goes faster. Finish Coat Stucco applied to a 1/8" thickness. Always refer to the fire-rated assembly test before making an assumption. Do The Job Right Proper installation is important if these desirable results are to be ... (stucco exterior finish) over plywood wall sheathing. Attach the masonry ties securely through the panels and into the steel or wood framing. How do you stucco over plywood? uniform thickness of stucco finish and reduces the risk of wavy wall surfaces. For many decades in California, stucco was installed directly over the studs, without any sheathing whatsoever. Follow with the three-dimensional drainage mat and two more layers of paper or felt. J. Plywood Siding K. Vinyl Siding L. Fiber Cement Siding M. Metal Siding Brick Cavity Wall Masonry or stone veneer can be applied over DensGlass Sheathing just as it would be over any other type of sheathing. Apply two layers of grade D building paper or asphalt felt to the plywood siding. Stucco provides a durable, low maintenance finish that adds lots of character to a house. Professional stucco repair contractor can always recognize stucco cracking originated by plywood because of the different crack directions. The Alberta Building Code (ABC), which is the legislated building code in Alberta, is based on the NBC but also permits two-coat stucco with a total thickness of not less th an 19 mm. Place stucco wheelbarrow for each application. .. Make sure to have each joint supported a 2" x 4" wood, with or without plywood backer. I have plywood siding with vertical battens attached to make it look like board & batten. Lets take a look at each technique as well as the advantage that each has to offer. As an insulated stucco assembly, LaHabra Fastwall 100-HE provides a durable exterior with an energy saving layer of continuous insulation. Kraft paper is factory applied to prevent over spray of stucco. My only warning using this product is properly hiding the seams (where two or more edges of Hardie panel meet or join. Depending on the contamination, you might only need to wash with water. It is applied … As with the brown coat, mix only enough stucco that can be applied in 1 hour and complete the entire wall or major section in one session to reduce possible color variations. Then feel free to install vertical strapping and stucco. UBC provisions specify 7/8-inch exterior cement plaster over plywood wall sheathing, with 2x wood studs … Install weep screeds and casing bead. treated plywood residential EIFS system 1 (optional when Zenith™ is installed over Tyvek®. Stucco thickness depends on the backup system and on whether or not lath is present. If water sprinkled on the wall is not readily absorbed, then the surface must be handled differently. Most all fire-rated assemblies require 7/8-inch and some require a full 1-inch thick cement plaster. However, on metal base the thickness is 5/8 to 7/8 inch. Stucco cracks develop for quite a few reasons, as we mentioned above. Check out our recommended tools right here: https://www.stuccoplastering.com/tools/ Hello, our faithful subscribers and plasterers around the world! The layer of Grade B paper may be applied as aWhen plywood ex-separate sheet or attached to and a part of paperback stucco mesh. Pros. Let dry for 24 hours. These days, it makes more sense to start with wall sheathing: rigid foam, diagonal boards, or plywood. Hardcoat stucco is typically a three layer cementitious rendering (scratch coat, brown coat and top coat) applied over a building paper, metal lath and sheathing (Photograph 2). Spread the stucco over the wall with the help of smooth trowel. Local codes do not dictate how the stucco is applied or how far it needs to be above the surface of the ground. The additional thickness of stucco on metal base is required to attain the desired hardened cementations properties. It is our opinion that major cause for cracked stucco is improper plywood installation during stucco installation process. Conventional stucco over wood should always be applied as a three-coat system. The spaces between the strips of Kraft paper allow for the visual alignment of the sheet for mechanical attachment of the ribs to the substrate. Step 3: Install Galvanized Lath or Netting. See stucco to fill the gaps in the mesh and apply to a thickness of about 3/8 of an inch thick. Install casing bead as a plaster stop at the corners of doors … 1. CA has a high humidity level and much more rain. The siding is 20 years old and we want to get rid of it. thick. Fortunately, whether your house has vinyl, brick, or stucco siding, the process of installing plywood over the windows is relatively straightforward. Successive coats should be applied as soon as possible after the that includes a layer of continuous insulation up to 1-1/2 in. 1. Rather than using drywall on the ceiling, stucco installations that go beyond the basic troweled-on layer need plywood backing to hold the metal lath in place. 2. Our Drainage Mat. Allow this base material to harden for one hour and scratch lightly with a … Fasten the netting to the wall, using galvanized nails or … This construction, which uses 2x wood studs spaced 16 inches o.c., eliminates the need for a As far as painting, it is not done on new stucco as the color is in the finish. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. Adequate protection of the plywood may be accomplished upon application of one layer of Grade B building paper applied over the plywood. The thickness of stucco on a solid substrate is 5/8 or 1/2 inch. 2. Trowel the 1/8" thick finish coat over the brown coat, starting at the bottom and working to the top of the wall. A white, 3.2 mm (1/8 in) thick mat composed of open weave polymer threads. The big advantage to three coat is its strength and durability. What is the correct thickness of stucco? We are often asked if stucco and plaster are the same thing, and if plaster and exterior insulation finishing systems (EIFS)are the same thing. (stucco) as an exterior finish over plywood wall sheathing is recognized as a “generic” construction system under provisions in the Uniform Building Code (UBC). Steps. A 3.2 mm (1/8 in) thick polyethylene spacer. Fastwall 100-HE is a "High Efficency" Continuous Insulation (CI) stucco assembly with a base thickness between 3/8 to 1/2 in. Stucco works different in different climates. The minimum thickness over framed walls is 3/4-inch. Plywood is a dimensionally stable wood, so it resists major expansion, contraction, warping, and swelling. Before applying stucco over wood, you will need to attach a layer of roofing felt to the surface followed by a sheet of wire mesh.Then apply a thin layer of stucco to the wire mesh surface as a base for the final coat. optional when installed over Tyvek® StuccoWrap™. One-coat systems may be applied as thin as 3/8-inch. Secure stucco mesh to your walls and then apply your layers of stucco for a watertight finish. You can use caulk or stucco patch, or epoxy on the joints. It can be applied with either a one coat or three coat process, but there is some confusion about the methods. For example, one coat stucco is actually a two-step process. Use a trowel to dance stucco. For example, three sides of the house might be plywood, with the front being made of manufactured veneer stone or cedar shingles. The scratch coat must be scored horizontally on vertical surfaces. While there are several parts of the North America where stucco always has a strong presence, there appears to be a general renewed interest in portland cement plaster for building finishes everywhere. The thinner finish weighs from 5 to 6 pounds per square foot, compared to 9 pounds for three-coat, and it is cost-competitive with traditional stucco. 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