Saving is roughly 20% for that wall. The scratch coat must extend to the top of the wall. Each coat should be 1 / 4 " to 3 / 8 ", no more. Stucco thickness depends on the backup system and on whether or not lath is present. The normal thickness is between 3 and 5 mm. Proper thickness can be ensured by spot checks with a thin measuring . The correct thickness is then 5/8 inch. (22 mm), and weighs 10-12 lb. The stucco installer suggests using a slightly thinner coat both for the scratch and brown coat, then finish it as the other walls. Complies with ASTM C 926 requirements for cement based plaster. b. gypsum, portland cement, and sand. Step 10: Clean-Up & Walk-Through. I have never heard of 2-coat stucco around here, although there is a one-coat stucco-like elastomeric product that is . 25-lb Base Coat Stucco Mix Model # 3753 Find My Store for pricing and availability 25 QUIKRETE 80-lb Premixed Finish Coat Stucco Mix Model # 120280 Find My Store for pricing and availability LaHabra Fiber 47 Sanded 80-lb Base Coat Stucco Mix Model # 2500 Find My Store for pricing and availability El Rey 11. When both are applied, that's your basecoat; the surfaces are unlimited if you want to put a texture in the base coat. This, too, is a bit of a misnomer. The scratch coat is applied to a thickness of half an inch and should completely surround the lath. Step 2: Inspection of Lath. by Sakrete Customer Care | Mar 5, 2022. As a stucco assembly, Teifs One Coat provides a durable exterior. SPEC MIX Scratch and Brown Preblended Stucco is a dry, preblended cement-based product designed to be used as the scratch and/or brown coat in a three-coat stucco application. The thicker the scratch coat, the better the overall strength characteristics of the finished plaster panel. The final thickness of a three-coat system is a minimum of 7/8-inch thick +/- allowable tolerances. , An 80lb. This provides a key for your next coat or the brown coat to be applied to. The Northwest Walls and Ceiling Bureau Stucco Resource Guide (available here) is a great resource for more information. Meets ASTM C 926 for Portland cement based plaster. cement stucco Depending on the condition of the concrete surface, Portland cement stucco may be directly bonded to the concrete. On wood-stud and cold-formed steel-stud wall assemblies, stucco is typically applied in three coats. Mix packaged stucco mix (such as Conproco or Quikrete) as directed. The scratch and brown coats are Portland cement plaster, typically each approximately 3/8in. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. Allow each coat to dry 24-48 hours. How thick should a scratch coat be? Stucco about 6 square feet @ 3/4" thick; Stucco about 21 square feet of finish coat @ 3/16" thick; Bond coat with 50 lb. The second coat of a stucco or plaster job is called the brown coat. Exterior stucco scratch coat thickness. Basically the three coat system consists of paper and wire, a scratch coat, a brown coat and a finish, or "top . Traditional Hard Coat stucco is the most common type of stucco cladding used in the United States, it is applied in 3 layers over metal lath: Scratch coat 3/8 inch Brown coat 3/8 inch Finish coat 1/8 inch Use a combination of both methods. In addition to water, a stucco base coat mix consists of a. gypsum, lime, and sand. Apply a thin coating, approximately 1/4 " (6.4mm) or 1/2 (12mm) with the trowel, then wait till it dries. . It is highly water resistant and very structurally sound, consisting of about an inch thick layer of cement on the exterior of the home. It is applied using a hawk and trowel and scratcher, spread evenly to achieve a depth of 3/8 of an inch thick. www.orlandosentinel.com. The final wall system will produce a nonload-bearing . After you have your first coat of stucco on, you then scratch it horizontally with a scarifier. Characteristics: The brown coat surface is much smoother than the scratch coat and is gritty to the touch but flatter and looks more appealing than the scratch. Step 2: Apply the Brown Coat. This assembly utilizes Teifs One Coat Stucco Base Concentrate or Teifs One Coat Stucco Base Sanded. Screed the material flat to a uniform 3/8-inch thickness with a straight-border darby or a straightedge. Wait for it to stiffen, and then scratch the surface with a raking tool to form 1/8-inch deep horizontal . After the cement is on the wall, the scratcher is used to create horizontal lines in the stucco. . Before drying, it is scored or grooved to create a strong . The scratch coat should be scored in a horizontal direction; shallow scratching is adequate. In a typical three-part stucco application, you apply a scratch coat to lath or netting, followed by a brown coat and a color coat. Trowel Application of Florida MarbleCote Our recommended specifications for the application of Florida Marblecote are as follows: Apply in a scratch coat, a base coat and a finish coat. bags - 56 per pallet. The scratches will make the next layer stick better. As its name suggests, three coat stucco is applied in three layers: 3/8-inch thick scratch coat, 3/8-inch thick brown coat, and approximate 1/8-inch thick finish coat. The goal is to achieve a uniform layer of mortar on the wall that supplements the mortar of the scratch coat and achieves a minimum 50 psi shear bond strength. 3 coats or layers with a total thickness of 3/4 of an inch or more (i.e., scratch coat, brown coat, and finish coat) Vulnerable to excessive cracking; Details are well developed. Hedberg Supply does not stock all of the materials needed for Stucco Scratch Coat applications. A Water-Resistant Barrier. The thickness can be one-eighth- to one-half-inch, depending on your local building codes. . How thick is stucco over concrete block? Two-coat Stucco (ASTM C 926): Typically over a solid plaster base of unit masonry or pre-cast or cast in place concrete with a 3/8-inch scratch, 1/8-inch brown and 1/8-inch finish coat for a total thickness of 5/8-inch (applied directly to the solid plaster base without lath). The thicker the scratch coat, the better the overall strength characteristics of the finished plaster panel. The thickness ranges from 3/8 to 5/8. What is the brown coat in stucco? For unit masonry, that thickness is inch. How thick is scratch and brown coat? The normal thickness is between 3 and 5 mm. If you get traditional stucco that is going to be extra heavy, then chances are you're going to need a 3-Coat stucco. Cure the scratch coat for 24 to 48 hours, keeping the surface damp by applying a fine water mist over several days. Scratch coat =3/8 inch thick, brown coat =3/8 inch thick, and finish coat =1/8 inch thick. How thick should a scratch coat be? Types of Stucco. 1 . The maximum thickness, including the finish coat, is 1/2-inch (12.7 mm). Over a basic frame construction . A one-coat stucco system--which is becoming more common--is not always one coat but is usually a modified one coat. This will prevent cracking. 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. This method speeds up the three coat stucco process by combining the scratch and brown coat into a single application of 3/8 to 1/2thick. Step 7: Poly Prep (For Smooth Stucco Applications Only) Step 8: Painting Non Stucco Surfaces (Where Applicable) Step 9: Color Coat. . 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). Big tip for all while on our channel. Helpful? (22 mm), and weighs 10-12 lb. Impact and fire . Advantages of Stucco. | Photo: courtesy IBACOS . c. portland cement, lime, and sand. . These measurements are based upon approved industry standards for certified stucco installation. What is the correct thickness of stucco? Mix and apply another -inch layer of base coat stucco directly to the scratch coat. It is applied with a hawk and trowel and a scratcher. Can stucco be 3 thick? Number of 80# Bags: Finish Coat Stucco at 1/4 inch Thickness: Number of 80 . This acts as the base coat. Install the rigid foam over plywood sheathing (not OSB) that has been properly nailed to the studs, with 1/8-inch gaps between the panel edges so the sheets can expand without compressing each other. The brown coat is applied in sufficient thickness to bring the . It is typically applied over rigid foam board and lath to provide an Energy Code required Continuous Insulated durable cladding. August 2, 2017. If you are looking for stucco installation contractors in Jacksonville FL are contact Stucco Repair Pros for a free stucco installation quote. E. Do not apply stucco material when temperatures are 40 Degrees Fahrenheit or below. This helps the brown coat stick to it. . Step 6: Cure time. SPEC MIX Scratch and Brown has a custom blended sand gradation that increases the walls flexural strength while reducing cracking and crazing. ALWAYS wet the base before applying a new coat of stucco. The total . They are used on virtually every house and are the main components that form the edges of stucco walls. The finish coat will make the patch level with original stucco and match its texture. Baker tells home builders, "It's important to the strength of the stucco to fur the metal lath out from the wall, allowing it to be embedded in the scratch coat." Multiple coats may be required to match the thickness of the original stucco. How many layers does stucco have? This involves the following parts: A Cement Coat. The Brown Coat This coat is applied after the scratch coat, using the same techniques. (I just finished a house, 3200 square feet, that used 80 bags for the scratch and brown.) 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. Apply a second back-buttered layer, again covering the entirety of the stone to a to " thickness, and press onto the prepared scratch coat. thickness o' 1/2 mm), or two coats a maximum total thickness nth (22 Refer to code compliance report Concrete and Masonry. 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 is very common to find the in many of today's modern homes. The approximately 7/8-inch three coat system is applied over an approved weather-resistive barrier and metal lath either by hand using a trowel or by machine application. In California, they say 7/8" min. Limitations not install Stopowe-e.all The term one coat stucco refers to a blend of Portland cement, sand, fibers, special proprietary chemicals, and water. QUIKRETE Scratch and Brown Base Coat Stucco (No. Lime and other things can also be added but aren't usually needed. bag of Scratch and Brown Stucco Mix will cover approximately 70 sq. The resulting thickness is 1/2 instead of 3/4 as everywhere else. 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. Stucco is applied in three coats: scratch, brown, and finish. Most commonly, stucco is applied on a basic wooden or metal framework, on concrete, or on plaster. Create horizontal grooves that are 1/8 (3mm) in thickness on your wall using a slotted palette, while keeping it perpendicular to the wall. In this video, I answer the old question, how thick stucco. 1139) is a portland cement based stucco used for construction and repair of stucco walls. Sometimes that is the first coat in some systems. 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