economical stucco systems. These measurements are based upon approved industry standards for certified stucco installation. The cement used in the one coat system is about 3/8 of an inch thick and is reinforced with fiberglass particles. One-Coat Stuccoing Details are well developed and part of the Evaluation Report or manufacturers' installation manuals. On the downside, one-coat systems are less impact resistant than traditional three-coat stucco. 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. In addition, it meets specific one-hour design criteria. 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. The finish coat is applied to a predamped, but still absorptive, base coat to a thickness of about in. (22 mm), and weighs 10-12 lb. The system is available as insulated and non-insulated. Masonry and concrete shall be sound, free of coatings, cured minimum 28 days. No matter what foundation you'll be working with, it's important to note that stucco thickness is not an arbitrary decision based on the company doing the installation. 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. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. QUIKRETE Finish Coat Stucco is designed for use as a decorative finish over portland cement base coats or QUIKRETE One Coat Fiberglass Reinforced Stucco. Metal Lath or Woven Welded Wire. One Coat Stucco is an ideal exterior wall treatment for residential, commercial, institutional or industrial buildings. ft. (6.5 m2) This system is the most time and labor intensive. . Open Framing (3/8 thickness Only) Continuous Insulation Direct Application (not shown) Concrete . Stucco systems have multiple coats which refer to scratch coats, brown coats, and finish coats. 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. It has a measuring range of 13 to 1000 microns (0.5 to 40 mils) and is ideal for measuring the total . -Designed to save material by functioning as an exterior cladding in thicknesses ranging from 3/8" to 1-1/2" -Designed to save time and labor by reducing the time required between trowel passes OCS Reference Sources Call us today for a free estimate at 843-247-6862. Into Master Wall Base Coats: Over the dried stucco, apply the base coat over the entire surface of the stucco in a thickness of approximately 1/16" (1.6 mm). Step 1: The first thing to do is to line up THE FACTORY EDGE of the foam with the edge of the corner. For stucco cladding systems, the amount of deflection anticipated would still be small (less than 1/32 in. This acts as the base coat. Note that this initial deflection would happen before the stucco mortar was hydrated and would not cause cracking of the solid stucco systems later. Armourwall 100 systems are designed for use where minimal cost and speed of construction are paramount. SPEC MIX Scratch & Brown Fiber Reinforced Stucco is engineered and preblended to provide superior consistency and durability when used as the scratch and/or brown coat in three-coat wall systems. Traditional" "Three-coat" stucco system (most common). When installed to meet the building code, these systems are a minimum of 7/8 inch thick "One" or "Two-Coat", proprietary systems are also available (must be approved to meet code). As a stucco assembly, Teifs One Coat provides a durable exterior. Application of the 3/8" thick scratch coat and " finish coat is similar to three-coat procedures described earlier. A Finish Coat. Other laths shall comply with ASTM C933-80 (welded) and ASTM C1032-86 (woven). One-coat can be finished in a variety of ways including premixed colored cement stucco finish coats, elastomeric coatings and paints or even acrylic textured finishesallowing some interesting . However, the outer layer of a "One Coat" system is about 3/8 of an inch thick and is a blend of cementous stucco materials reinforced with fiberglass fibers. The evaluation reports state that the one-coat manufacturer's product can be used if it is used in a specified way. This mixture is called a scratch coat. 20 gauge, 25.4 mm (1") galvanized steel woven wire fabric is required. CONSISTENT EVERY BATCH. The lath is self furred or furred when applied. www.echotape.com. The measurement method is simple and non-destructive. View More. for up to 8 in. (36.3 kg) bag " (3 mm) Thickness 70 sq. Fastwall 100 Assembly provides a durable exterior in less time that traditional stucco. A BPS Kote, Skim Coat with embedded fibermesh - Crack-Resistant System (CRS) (optional). Teifs One Coat has a min. It is very hard, like Traditional 3 coat stucco. The base coat for PB systems is usually only 1/16-inch thick and finish coat thickness is typically no thicker than the maximum sand particle size in the finish coat. The complete plastering . Bringing peace, love, and harmony back to the world of plastering. 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. One Coat Stucco combines the scratch and brown coat into a single application of 3/8 to 1/2 thick. For cast-in-place or precast concrete, the thickness for two-coat work is 3/8 inch. 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. One-Coat Stucco Basics6 Common Problem Areas; What Is the Cost of Quality Construction? Some one-coat systems include a layer of foam board beneath the base coat for enhanced insulation properties. The base coat varied from 1/2 - 1-1/2 inches in thickness. The displayed result is the total thickness of the coating system (primer + paint layers). Step 10 Screed the stucco to a uniform depth of 3/8 inch using a straight edge. bag of Portland cement and 25lb. Thickness of application can range from an 1/8-inch skim coat to a 5/8-inch-thick cement base. It's pumped through a hose and sprayed on the initial layer to a thickness of up to 7 inches, just enough to embed the paper-and-wire sheet. "One Coat" Stucco Systems - The stucco is usually 3/8 inch to 1/2 inch thick "One Coat" systems are proprietary layered systems with an engineered blend of cements and fibers applied over a "Styrofoam" type of rigid foam board with a metal wire lath. 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. Immediately embed the Bulltec Stucco Mesh into the wet base coat and smooth from the center to the edge to avoid wrinkles. One-Coat-Stucco is applied in coats or layers with a total thickness of 3/8 to 1/2 inches. The first base coat is called a scratch coat, the second is called a brown coat. Three-coat stucco is a longstanding, nonproprietary cladding system that has a scratch, then base, then finish coat, resulting in a 7/8-inch- to 1-inch-thick cladding. Can . The structure behind the one-coat stucco is mandated by the evaluation services. For unit masonry, that thickness is inch. Sanded Gray Western 1-Kote is a cement plaster that only requires water at the job site. Elastomeric coatings should be applied from 8 to 24 mils in thickness. 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. Final coat is the color coat, about 3/16" thick, for a total stucco thickness of about 7/8". Seldom will a homeowner come across a "One Coat" system. I have never heard of 2-coat stucco around here, although there is a one-coat stucco-like elastomeric product that is . Flash all windows, doors, and other penetrations to the water control layer prior to installing the insulation. Determine the location of the wall's water control layer (typically behind the insulation over the exterior sheathing). The scratch coat will then have to be leveled, but not smoothly for bonding. Proper execution and attention to detail are a must. 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. e. Thickness: 0.75 . This allows moisture that hits the surface to easily evaporate away. lastly, one coat is all that's necessary but instead of 3/8 apply half-inch or more. Different manufacturers have different recommendations. NOTE: for one coat stucco systems, apply QUIKRETE One Coat Fiberglass Reinforced Stucco in a single application at inch thick. This is followed by a color coat of about 1/8" thickness. It can withstand years of weather and physical abuse. 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. Stucco thickness depends on the backup system and on whether or not lath is present. Step 11 Scratch 1/8 inch deep horizontal grooves into the base coat with a raking tool once the stucco has become thumb-print hard. How thick is stucco coat? . Although, if mixed and installed properly, the proprietary mixes are very effective at minimizing cracking. per sq. This assembly utilizes Teifs One Coat Stucco Base Concentrate or Teifs One Coat Stucco Base Sanded. A Finishing Coat. Lap the mesh a minimum of 2-1/2" (63.5 mm) on all sides. Provide a drainage gap in front of the water control layer. The one-coat stucco properties evaluated are structural, durability, fire resistance ratings and the types of construction (I through IV non-combustible construction) the material can be installed on. A PAF Primer Coat (optional). 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). (3/8"-1/2" thick stucco). 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. floated to a sand finish, or sprayed. Hello everyone, On this short video clip I am explaining the Stucco thickness on Cinder block or CMU walls. for up to 4 in. The Application. It uses the Styrofoam in place of a "scratch coat" that is typical in a three coat stucco system. Coverage is approximately 92-105 square feet at 3/8 inch thickness when mixed with 200-240 pounds of sand . What is the correct thickness of stucco? The 3 coats needed for a proper stucco installation includes, 1) The Scratch Coat (raked horizontally) with a minimum 3/8" thickness. b. d. Length: 50 feet (15.2m). One-Coats advantage is it will last decades with little maintenance. BuildCrete Stucco- true one-coat stucco designed to adhere directly to any EPS foam, CMU block, DensGlass, Securock, concrete and other building materials. Total Wall Stucco Concentrate requires only mason sand (Menards SKU# 1891110) and water to be added at the job site. 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. 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. The term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals, and water. The finish coat is applied from the top down and the whole wall surface must be covered without joinings (laps or interruptions). A coat is defined as "a layer or thickness of stucco applied in a single operation." Step-by-Step Materials Scratch Coat: First coat of plaster/stucco applied to the surface in two or three coat stucco work. MAXIMUM ADHESION. A trowel can be used for small areas instead of a spray. Provides a hard, durable finish. 2. Min No. The PosiTector 200 B1 is ready to measure most drywall coating applications right-out-of-the-box. 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. An alkali resistant fiberglass reinforced stucco designed for use in one-coat stucco applications. The three-coat stucco system total thickness is approximately in. We also remove and replace EIFS and synthetic stucco with hard coat stucco. Impact and fire . This system is a tested and engineered One Coat stucco wall assembly. Traditionally, it's at least 7/8 inch thick. 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