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