This mixture is called a scratch coat. 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. "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. 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 . The thickness ranges from 3/8 to 5/8. 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. 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. Advantages of Stucco. The scratch coat must be scored horizontally on vertical surfaces. 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. Details are well developed and part of the Evaluation Report or manufacturers' installation manuals. The three-coat stucco system total thickness is approximately in. Armourwall 100 systems are designed for use where minimal cost and speed of construction are paramount. Photo shows the first 2 steps of the 3 coat process- Scratch Coat & Brown Coat. Fastwall 100 Assembly provides a durable exterior in less time that traditional stucco. This detail shows a three coat Portland cement stucco assembly applied over self-furring lath with two layers of weather resistive barrier (WRB) behind the lath. One-Coat Stucco is applied as a single base coat 3/8-inch to 1/2-inch thick followed by a required finish coat. Its typical uses include exterior, interior, high impact . 20 gauge, 25.4 mm (1") galvanized steel woven wire fabric is required. Metal Lath or Woven Welded Wire. 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 outside corners are fairly easy to do but a couple of key tricks will make it easier to make them straight, which is essential for a professional looking stucco job. FacadesOne One Coat Stucco System. Total Wall Stucco Concentrate requires only mason sand (Menards SKU# 1891110) and water to be added at the job site. Stucco systems have multiple coats which refer to scratch coats, brown coats, and finish coats. Stucco needs to breath - One of the main reasons you shouldn't coat your stucco with paint is because stucco is porous. This is usually asphalt-covered paper that's tacked to the base coat. The complete plastering . Impact and fire . Traditional" "Three-coat" stucco system (most common). Beside above, what is a 3 coat stucco system? OCS ONE COAT STUCCO -A custom blend of Portland cement, sand, extenders, fiber reinforcement and modifiers. Fabric Material: Non-Woven Geo-composite Fabric. Seldom can a water-resistant finish be developed with a single coat of elastomeric coating. One-Coats advantage is it will last decades with little maintenance. Basically, it consists of all the layers of the three-coat into one. 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. Locate and construct control joints as in three-coat stucco systems described earlier in this section. The term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals and water. As a stucco assembly, Teifs One Coat provides a durable exterior. As its name suggests, three coat stucco is applied in three layers: 3/8-inch thick scratch . The finish coat, in both the one-coat and three-coat systems, can be either standard stucco mix or . 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. Application of the 3/8" thick scratch coat and " finish coat is similar to three-coat procedures described earlier. What Is One Coat Stucco & What Is The Benefit? 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. These systems may be as thin as 3/8 inch. e. Thickness: 0.75 . Min No. Locally owned and operated, we install and repair stucco on new construction and existing homes or buildings. One-Coat Stucco Basics6 Common Problem Areas; What Is the Cost of Quality Construction? The PosiTector 200 B1 is ready to measure most drywall coating applications right-out-of-the-box. Open Framing (3/8 thickness Only) Continuous Insulation Direct Application (not shown) Concrete . lastly, one coat is all that's necessary but instead of 3/8 apply half-inch or more. Sanded Gray Western 1-Kote is approved for application over a variety of wood and foam substrates. Coverage is approximately 92-105 square feet at 3/8 inch thickness when mixed with 200-240 pounds of sand . MAXIMUM ADHESION. This allows moisture that hits the surface to easily evaporate away. economical stucco systems. One Or More Layers Of Scratch. It is an alternative to the three coat system and has its advantages and disadvantages. b. The finish coat is applied from the top down and the whole wall surface must be covered without joinings (laps or interruptions). What is 2 coat stucco? SPEC MIX Scratch & Brown Fiber Reinforced Stucco is a custom blend of cementitious materials, additives, aggregates, and alkali resistant fibers meeting . The term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals, and water. 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 term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals, and water. A Finishing Coat. First coat is the scratch coat, so called because it is scratched horizontally to accept the 2nd, or brown coat, with minimum waste. This is followed by a color coat of about 1/8" thickness. 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. per sq. The lath is self furred or furred when applied. We also remove and replace EIFS and synthetic stucco with hard coat stucco. . Many claim that one-coat is the most ideal and efficient means of a stucco system. 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). Seldom will a homeowner come across a "One Coat" system. How thick is stucco coat? . 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. 1 hour fire rating over plywood or OSB and EPS foam when applied in accordance with ICC ESR-1240. 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. Core Material: Extruded Polymer Matrix. PAF primer may be tinted to match the desired finish. ft. (6.5 m2) 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. 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. The structural backup is concrete masonry, with rigid insulation between Z-channel furring. Immediately embed the Bulltec Stucco Mesh into the wet base coat and smooth from the center to the edge to avoid wrinkles. In addition, it meets specific one-hour design criteria. The evaluation reports state that the one-coat manufacturer's product can be used if it is used in a specified way. bag of Portland cement and 25lb. The maximum thickness, including the finish coat, is 1/2-inch (12.7 mm). How thick is a 3 coat stucco system? The contractor recreated the original profiles with the use of templates and imagination. -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 FACADESONE is installed as a one coat 3/8" thick code compliant assembly or as a traditional scratch and brown stucco. . In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. thick. A Finish Coat. Two-coat applications are only for use over solid plaster bases without metal lath. The correct thickness is then 5/8 inch. A trowel can be used for small areas instead of a spray. It combines the long life cycle, durability and traditional aesthetics of three coat stucco with lower labor costs and shorter scheduling. Formula: 18 shovels of clean, one 94 lb. The displayed result is the total thickness of the coating system (primer + paint layers). CONSISTENT EVERY BATCH. ONE COAT STUCCO: OCS Custom blend of Portland cement, sand, extenders, fiber reinforcement & modifiers Designed to save material by functioning as an exterior cladding in thicknesses ranging from 3/8" to 1-1/2" Designed to save time & labor by reducing the time required between trowel passes from weeks to only days or perhaps hours. Traditionally, it's at least 7/8 inch thick. 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. One Coat Stucco assemblies are code-approved proprietary systems that must be specified and installed per the manufacturer's approved specifications and details. for up to 4 in. This assembly utilizes Teifs One Coat Stucco Base Concentrate or Teifs One Coat Stucco Base Sanded. 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. of mason lime. It uses Diamond Wall PM Concentrate and is fielded mixed with the liquid Diamond Wall PM Admix. The three-coat stucco system total thickness is approximately in. The cement used in the one coat system is about 3/8 of an inch thick and is reinforced with fiberglass particles. of insulation and less than 1/16 in. The SMA added the following tips: One-coat stucco is quicker to apply using a reduced amount of material and labor. c. Width: 48 inches (122 cm). One Coat Stucco consists of a blend of Portland cement, sand, fibers and special chemicals which produce a very efficient stucco system. What To Watch Out For When Applying Stucco A Water-Resistant Barrier. of insulation). Scratch can be a number of different things, including a wire grid, a rough coat of stucco, or a brown layer. Stucco thickness. For your next stucco project, contact the team at Spring Construction. How thick is stucco coat? Step 12 The "One Coat" systems will vary based on the manufactures design and installation requirements. This assembly utilizes Fastwall Basecoat Concentrate or Fastwall Basecoat Sanded. Other laths shall comply with ASTM C933-80 (welded) and ASTM C1032-86 (woven). Score Horizontally. "One-coat" stucco actually uses two stucco coats in most applications. . One-coat stucco systems add strengthening agents such as glass fibers and other proprietary ingredients to the base coat of the stucco. Stucco thickness depends on the backup system and on whether or not lath is present. I have never heard of 2-coat stucco around here, although there is a one-coat stucco-like elastomeric product that is . Stucco thickness on Cinder block or CMU walls. Call us today for a free estimate at 843-247-6862. An alkali resistant fiberglass reinforced stucco designed for use in one-coat stucco applications. While the polymer based skin repels water very effectively, problems arise when moisture gets behind the synthetic stucco and is trapped inside the wall. This system is a tested and engineered One Coat stucco wall assembly. a. 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. (Early formulations used a single coat, but the color and texture were inconsistent.) (22 mm), and weighs 10-12 lb. Stucco stucco exterior wall systems one and two coat A. 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. These systems consist of a Parex Stucco Base Coat, installed minimum 3/8 inch, and an acrylic, elastomeric or specialty finish coat. Lap the mesh a minimum of 2-1/2" (63.5 mm) on all sides. Most one-coat manufacturers recommend that elastomeric coatings be used to protect the stucco. The finish coat is applied to a predamped, but still absorptive, base coat to a thickness of about in. www.echotape.com. for up to 8 in. d. Length: 50 feet (15.2m). These are direct-applied systems, meaning that there is no metal lath involved. Elastomeric coatings should be applied from 8 to 24 mils in thickness. Proper execution and attention to detail are a must. 2) The Brown Coat also should have a minimum 3/8" thickness. floated to a sand finish, or sprayed. BuildCrete Stucco- true one-coat stucco designed to adhere directly to any EPS foam, CMU block, DensGlass, Securock, concrete and other building materials. 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. A BPS Kote, Skim Coat with embedded fibermesh - Crack-Resistant System (CRS) (optional). The first base coat is called a scratch coat, the second is called a brown coat. 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. The base coat varied from 1/2 - 1-1/2 inches in thickness. 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. One-Coat-Stucco is applied in coats or layers with a total thickness of 3/8 to 1/2 inches. NOTE: for one coat stucco systems, apply QUIKRETE One Coat Fiberglass Reinforced Stucco in a single application at inch thick. One Coat Stucco combines the scratch and brown coat into a single application of 3/8 to 1/2 thick. On the downside, one-coat systems are less impact resistant than traditional three-coat stucco. 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. As with any exterior cladding, it should always be installed over a properly executed WRB. (22 mm), and weighs 10-12 lb. It has a measuring range of 13 to 1000 microns (0.5 to 40 mils) and is ideal for measuring the total . Scratch coat =3/8 inch thick, brown coat =3/8 inch thick, and finish coat =1/8 inch thick. The Application. . 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. Also, one-coat stucco systems are not completely waterproof. Make certain to cure the scratch coat for at least 24 hours before applying the finish coat. One-coat stucco systems have just one base coat about 1/2-inch thick with a thin finish coat, so these claddings are sometimes . Thickness of application can range from an 1/8-inch skim coat to a 5/8-inch-thick cement base. Nominal thickness is to 5/8 inch for no lath and to one inch with lath. The measurement method is simple and non-destructive. (36.3 kg) bag " (3 mm) Thickness 70 sq. For stucco cladding systems, the amount of deflection anticipated would still be small (less than 1/32 in. Determine the location of the wall's water control layer (typically behind the insulation over the exterior sheathing). (3.2 mm). Thickness around penetrations, such as doors and windows is a nominal 3/8-inch (9.5 mm), backed by framing and blocking. One Coat Stucco is an ideal exterior wall treatment for residential, commercial, institutional or industrial buildings. 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. View More. Types of Stucco. The structure behind the one-coat stucco is mandated by the evaluation services. A PAF Primer Coat (optional). Flash all windows, doors, and other penetrations to the water control layer prior to installing the insulation. 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. There is not a little give in it when you push on it. Provides a hard, durable finish. Provide a drainage gap in front of the water control layer. QUIKRETE Finish Coat Stucco is designed for use as a decorative finish over portland cement base coats or QUIKRETE One Coat Fiberglass Reinforced Stucco. 2. This system is the most time and labor intensive. Can stucco be 3 thick? 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). One-coat systems speeds up application time and reduces labor and material costs. It is typically applied over a rigid foam board and lath to provide an Energy Code . Cement-based three coat stucco systems have been providing a long-lasting, attractive cladding for buildings for over 100 years. 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). For cast-in-place or precast concrete, the thickness for two-coat work is 3/8 inch. A 1/4 scratch coat and 1/2 brown coat make up the base coat, with a finish coat on the . Proper thickness can be ensured by spot checks with a thin measuring tool. . 3) The Finish Coat, also referred to as the Texture Coat should be a . What is the correct thickness of stucco? Bringing peace, love, and harmony back to the world of plastering. Install stucco cladding per manufacturer requirements. One-Coat Stuccoing Hello everyone, On this short video clip I am explaining the Stucco thickness on Cinder block or CMU walls. Can be used as the scratch and brown coat in a conventional two or three coat stucco system. It is the responsibility of the architect, engineer, builder, contractor and applicator to follow those mandates. 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. Some one-coat systems include a layer of foam board beneath the base coat for enhanced insulation properties. Exterior restoration included replacing the deteriorated stucco system with a polymer-modified fiber reinforced base coat and a traditional cementitious stucco finish. Different manufacturers have different recommendations. 1) Make Sure The Substrate is Suitable Note that this initial deflection would happen before the stucco mortar was hydrated and would not cause cracking of the solid stucco systems later. Can . Step 10 Screed the stucco to a uniform depth of 3/8 inch using a straight edge. Teifs One Coat has a min. www.echotape.com. Sanded Gray Western 1-Kote is a cement plaster that only requires water at the job site. For unit masonry, that thickness is inch. 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. Stucco should be applied with enough pressure to force the material into the surface of the block to ensure a mechanical key and section bond. Although, if mixed and installed properly, the proprietary mixes are very effective at minimizing cracking. Final coat is the color coat, about 3/16" thick, for a total stucco thickness of about 7/8". This acts as the base coat. These measurements are based upon approved industry standards for certified stucco installation. Masonry and concrete shall be sound, free of coatings, cured minimum 28 days. It is very hard, like Traditional 3 coat stucco. BPS Kote must be applied at a minimum thickness of 1/16" with an approved alkali-resistant reinforcing fibermesh fully embedded within the coating. The scratch coat will then have to be leveled, but not smoothly for bonding. Fastwall 100 is the 1-Coat stucco assembly with a base coat thickness between 3/8 to 1/2 in. 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. 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. Description: Sanded Gray Western 1-Kote is designed to be an upgraded product for one coat wall systems. 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. We are your local stucco specialists. Vulnerable to some cracking. (3/8"-1/2" thick stucco). 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. The system is available as insulated and non-insulated. Table 4 summarizes the recommended nominal plaster coat thicknesses for both two and three coat work. Step 1: The first thing to do is to line up THE FACTORY EDGE of the foam with the edge of the corner. It uses the Styrofoam in place of a "scratch coat" that is typical in a three coat stucco system. 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. It can withstand years of weather and physical abuse. The 3 coats needed for a proper stucco installation includes, 1) The Scratch Coat (raked horizontally) with a minimum 3/8" thickness.
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