Hello everyone, On this short video clip I am explaining the Stucco thickness on Cinder block or CMU walls. One Coat Stucco is an ideal exterior wall treatment for residential, commercial, institutional or industrial buildings. This assembly utilizes Teifs One Coat Stucco Base Concentrate or Teifs One Coat Stucco Base Sanded. A BPS Kote, Skim Coat with embedded fibermesh - Crack-Resistant System (CRS) (optional). Formula: 18 shovels of clean, one 94 lb. The base coat varied from 1/2 - 1-1/2 inches in thickness. This assembly utilizes Fastwall Basecoat Concentrate or Fastwall Basecoat Sanded. d. Length: 50 feet (15.2m). This acts as the base coat. This is followed by a color coat of about 1/8" thickness. The thickness ranges from 3/8 to 5/8. The cement used in the one coat system is about 3/8 of an inch thick and is reinforced with fiberglass particles. One-Coat-Stucco is applied in coats or layers with a total thickness of 3/8 to 1/2 inches. of mason lime. A PAF Primer Coat (optional). Two-coat applications are only for use over solid plaster bases without metal lath. This method speeds up the three coat stucco process by combining the scratch and brown coat into a single application of 3/8 to 1/2 thick. 3/8 inch total thickness - or thicker if required by a fire resistance rated or STC rated assembly and a maximum in accordance with ASTM C926. (3.2 mm). The SMA added the following tips: Elastomeric coatings should be applied from 8 to 24 mils in thickness. While the polymer based skin repels water very effectively, problems arise when moisture gets behind the synthetic stucco and is trapped inside the wall. How thick is a 3 coat stucco system? Determine the location of the wall's water control layer (typically behind the insulation over the exterior sheathing). Details are well developed and part of the Evaluation Report or manufacturers' installation manuals. Lap the mesh a minimum of 2-1/2" (63.5 mm) on all sides. Can stucco be 3 thick? How thick is stucco coat? (22 mm), and weighs 10-12 lb. NOTE: for one coat stucco systems, apply QUIKRETE One Coat Fiberglass Reinforced Stucco in a single application at inch thick. It combines the benefits of a long life cycle, durability, and traditional aesthetics found in our three coat system with shorter scheduling and lower labor costs. Provide a drainage gap in front of the water control layer. Install stucco cladding per manufacturer requirements. Flash all windows, doors, and other penetrations to the water control layer prior to installing the insulation. FACADESONE is installed as a one coat 3/8" thick code compliant assembly or as a traditional scratch and brown stucco. As with any exterior cladding, it should always be installed over a properly executed WRB. The maximum thickness, including the finish coat, is 1/2-inch (12.7 mm). A single 3/16-inch thick coat applied on the bottom of the pool and 3/8-inch on the sides, directly over EPS delivers 3500+ PSI compressive strength. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. e. Thickness: 0.75 . 1) Make Sure The Substrate is Suitable Before applying each new coat, wet surface with clean water, we recommend this 3-coat application: 1. frame and Plywood base: Applied over the lath at a 3/8" thickness. Sanded Gray Western 1-Kote is approved for application over a variety of wood and foam substrates. Total Wall Stucco Concentrate is designed to be a one-coat, hi-lift stucco that's capable of thickness from one-quarter-inch to one inch using multiple passes. Total Wall Stucco Concentrate requires only mason sand (Menards SKU# 1891110) and water to be added at the job site. I have never heard of 2-coat stucco around here, although there is a one-coat stucco-like elastomeric product that is . Applying the Stucco First or Scratch Coat The first, or "scratch," coat, which forms the base for the next two coats, should completely encase the reinforcement. Can be used as the scratch and brown coat in a conventional two or three coat stucco system. Can . The evaluation reports state that the one-coat manufacturer's product can be used if it is used in a specified way. QUIKRETE Finish Coat Stucco is designed for use as a decorative finish over portland cement base coats or QUIKRETE One Coat Fiberglass Reinforced Stucco. Different manufacturers have different recommendations. This system is the most time and labor intensive. In addition, it meets specific one-hour design criteria. The correct thickness is then 5/8 inch. For stucco cladding systems, the amount of deflection anticipated would still be small (less than 1/32 in. FacadesOne One Coat Stucco System. These measurements are based upon approved industry standards for certified stucco installation. One-Coats advantage is it will last decades with little maintenance. OCS ONE COAT STUCCO -A custom blend of Portland cement, sand, extenders, fiber reinforcement and modifiers. Note that this initial deflection would happen before the stucco mortar was hydrated and would not cause cracking of the solid stucco systems later. Traditional" "Three-coat" stucco system (most common). Cement-based three coat stucco systems have been providing a long-lasting, attractive cladding for buildings for over 100 years. The PosiTector 200 B1 is ready to measure most drywall coating applications right-out-of-the-box. Description: Sanded Gray Western 1-Kote is designed to be an upgraded product for one coat wall systems. These are direct-applied systems, meaning that there is no metal lath involved. The complete plastering . (22 mm), and weighs 10-12 lb. Bringing peace, love, and harmony back to the world of plastering. First coat is the scratch coat, so called because it is scratched horizontally to accept the 2nd, or brown coat, with minimum waste. We also remove and replace EIFS and synthetic stucco with hard coat stucco. Metal Lath or Woven Welded Wire. An alkali resistant fiberglass reinforced stucco designed for use in one-coat stucco applications. These systems may be as thin as 3/8 inch. The stucco contractor is supposed to do this, but you can keep everyone motivated with random, surprise thickness checks of your own in a couple of spots. The finish coat is applied from the top down and the whole wall surface must be covered without joinings (laps or interruptions). Beside above, what is a 3 coat stucco system? Any applications exceeding 5/8 inch would generally require a lath be installed to carrier the weight." A lath is a wood or metal mesh backing that adds support to stucco. Proper thickness can be ensured by spot checks with a thin measuring tool. . This is usually asphalt-covered paper that's tacked to the base coat. economical stucco systems. Seldom can a water-resistant finish be developed with a single coat of elastomeric coating. In threecoat stucco, the first and second coats are 3/8-inch thick, and the finish coat is 1/8-inch for a total thickness of 7/8 to 1 inch. bag of Portland cement and 25lb. Seldom will a homeowner come across a "One Coat" system. Application of the 3/8" thick scratch coat and " finish coat is similar to three-coat procedures described earlier. Stucco needs to breath - One of the main reasons you shouldn't coat your stucco with paint is because stucco is porous. Uses include manufactured and natural stone, traditional and one coat stucco, EIFS, fiber-cement and wood based sidings, masonry, metal and other wall cladding materials. (36.3 kg) bag " (3 mm) Thickness 70 sq. Successive coats should be applied as soon as possible after the underlying coat has sufficient strength and rigidity to resist damage when the next coat is applied. Application Methods: The plaster may be applied by hand tools or machine pumps but must be applied with sufficient pressure to adhere to the substrate. If a threecoat system is required and there is a question about the bond, or if extra thickness is required, use one of the methods prescribed in the section on Bond above. No, one-coat refers to the fact that the conventional basecoat that is applied in two coats (scratch & brown) to a nominal 3/4 inch thickness, can be applied in one coat to a nominal 1/2 inch thickness over foam or other rigid sheathings. This system is a tested and engineered One Coat stucco wall assembly. And with a thickness of only 3/8-inch, one-coat systems are less able to hide irregularities in the framing and are more likely to have thin spots that are prone to problems. These systems consist of a Parex Stucco Base Coat, installed minimum 3/8 inch, and an acrylic, elastomeric or specialty finish coat. The one-coat system incorporates a vapor barrier applied over the sheathing (building paper, Tyvec, etc), followed by 1" foam board then lath, then a base coat of portland cement plaster (usually reinforced with fibers) at about 3/8" in thickness (specs vary on this). floated to a sand finish, or sprayed. The measurement method is simple and non-destructive. As a stucco assembly, Teifs One Coat provides a durable exterior. This method speeds up the three coat stucco process by combining the scratch and brown coat into a single application of 3/8 to 1/2 thick. For your next stucco project, contact the team at Spring Construction. The third coat, the finish coat, is often pigmented for color and applied by smooth trowel, hand-textured, floated to a sand finish, or sprayed. The term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals, and water. 2. The "One Coat" systems will vary based on the manufactures design and installation requirements. lastly, one coat is all that's necessary but instead of 3/8 apply half-inch or more. SPEC MIX Scratch & Brown Fiber Reinforced Stucco is a custom blend of cementitious materials, additives, aggregates, and alkali resistant fibers meeting . Score Horizontally. Also, one-coat stucco systems are not completely waterproof. CONSISTENT EVERY BATCH. 20 gauge, 25.4 mm (1") galvanized steel woven wire fabric is required. Coverage is approximately 92-105 square feet at 3/8 inch thickness when mixed with 200-240 pounds of sand . It has a measuring range of 13 to 1000 microns (0.5 to 40 mils) and is ideal for measuring the total . Typical Values -Mix Finish Coat Stucco Compressive Strength, psi (ASTM C109) 7 days > 900 psi (6.2 MPa) 28 days > 1,200 psi (8.2 MPa) FINISH COAT STUCCO White Portland cement-based decorative finishing plaster Base Coat Stucco Approximate Coverage per 80 lb. One Or More Layers Of Scratch. The Diamond Wall PM One Coat System offers an upgrade to current one coat stucco systems by providing improved crack resistance, flexural and tensile strength, and impact resistance. As its name suggests, three coat stucco is applied in three layers: 3/8-inch thick scratch . It is typically applied over a rigid foam board and lath to provide an Energy Code . The base coat is applied in a single application (combining the scratch and brown coat) to a minimum thickness of 3/8-inch (9.5 mm), unless otherwise noted. Thickness of application can range from an 1/8-inch skim coat to a 5/8-inch-thick cement base. 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