The ASTM will also give the correct standards for thickness for Stucco over CMU along with the correct mix design. Fibered Stucco may be used in place of TOTAL WALL Hard Coat. Lath, Trim-Accessories 15 15. Provides a hard, durable single coat over EPS and other exterior walls sheathings, over 3500 PSI compressive strength. Spread the stucco over the entire surface, to a thickness of 1/8 to 1/4 inch. Two-coat applications are only for use over solid plaster bases without metal lath. Load stucco on a hawk and then take it on trowel for application. Download File 2018-BuildCrete-Stucco-Plaster-Pool-Plaster-Brochure-1.pdf - 1 MB. Technical Bulletin, Stucco over metal lath attached to CMU PUSA 66-12.pdf The Armourwall 100 WaterMaster System is qualified on fire rated and non-combustible construction. The overall thickness of this coat should be an inch for 2-coat processes and around inches for 3-coat work. Project Instructions Step 1 Attach two layers of Grade D, waterproof building paper using galvanized nails or staples in a shingled fashion over the wall sheathing extending 16 inches around all corners. Three Coat Application: At metal lathed surfaces, apply scratch coat to a nominal thickness of 3/8 inch, brown coat to a nominal thickness of 3/8 inch, and finish coat to a nominal thickness of 1/8 inch. BuildCrete has been used on ICF construction for its durability, strength, and ease of application. Access or vehicle ramps which rise to the interior finish floor elevation for the width of such ramps only. You can apply stucco over wood sheathing, masonry or brick. The scratches will make the next layer stick better. Requires a three-step process for a 7/8" thickness total (3/8" scratch coat, 3/8" brown coat & 1/8" finish texture) . Paint or decorative cementitious finish less than 5 / 8 inch (17.1 mm) thick adhered directly to the masonry foundation sidewall. thickness allowed by c926 over the 2 narrower block. Polymer based (PB) systems, sometimes known as thin coat, soft coat, or flexible finishes, are the most common. 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. srmi.biz Next, screed the stucco to a uniform depth of inch. The structural backup is concrete masonry, with rigid insulation between Z-channel furring. As mentioned above, mechanical attachment of insulation boards is not the preferred choice unless a smooth and/or painted surface will be the substrate. Omega . August 5, 2016 . Over Masonry Stucco Repair. Allow the final coat to cure over the next several days. Orlando, Florida 32822 Apply the Scratch Coat. For cast-in-place or precast concrete, the thickness for two-coat work is 3/8 inch. BuildCrete is a true one-coat finish designed to adhere directly to any EPS foam, CMU block, DensGlass, Securock, concrete and other building materials. The thickness can be one-eighth- to one-half-inch, depending on your local building codes. The difference in thickness with adjacent stucco also increases the likelihood of cracks developing. Unscrew the wood strips and fill in the space with stucco. Therefore, thickness could be as thin as 3/4" and thick . If water sprinkled on the wall is not readily absorbed, then the surface must be handled differently. Paint or decorative cementitious finish less than 5 / 8 inch (17.1 mm) thick adhered directly to the masonry foundation sidewall. . . . Determine the location of the wall's water control layer (typically behind the insulation over the exterior sheathing). Applies directly over EPS, stucco or (CMU) cement block etc. Cement Board Stucco (CBS) 1000 CI with MaxGrip Veneer Mortar. 5. Apply a thin coating, approximately 1/4 " (6.4mm) or 1/2 (12mm) with the trowel, then wait till it dries. A variety of finish options are available including ColorTek stucco, AkroFlex acrylic stucco . A code approved water resistive . The finish coat is applied to a predamped, but still absorptive, base coat to a thickness of about in. 2D DWGs. Stucco over Masonry, Concrete or Concrete Masonry Units (CMU)- Caveats: Lath is option and intended for walls requiring cement thickness greater than 5/8 inch. 2. Starting the Installation: Standard - Non WaterMaster Stucco System 12 13. Get started with the application over the cinder wall using a trowel. Direct Applied applications over concrete masonry may use a 1/4" ground-casing 3D PDFs. A basic stucco assembly over concrete or CMU, applied directly over approved water-resistive barrier and metal lath with a Dryvit finish. For unit masonry, that thickness is inch. The outer layer, TOTAL WALL Finish, is an all-acrylic, pre-textured and pre-colored finish coat at approximately 1/32" to 1/8" thickness depending on the desired texture. Use required pressure so as to press the mix into the wall as you go on applying it. Dryvit Commercial Cement Plaster (CCP) is a single source stucco solution combining the best of old and new world technology to create a better stucco wall assembly. (3.2 mm). The cement is spread evenly among the surface at a depth of about 3/8 of an inch thick. Install stucco as an exterior wall cladding over rigid foam insulation with proper preparation to provide water management as well as a sound substrate for the stucco. Step 2 Install trim accessories. Apply a thin layer, about " (6.4mm) or " (12mm) using the trowel, and wait for it to dry slightly. Looks aren't an issue since this is the base layer. It works like a primer that prepares the surface for the final coat, making it smoother and bond better. PART 1 - GENERAL 1.1 SECTION INCLUDES . Stucco Thickness Over Block / CMU Walls is inch If the stucco is applied too thick, there is a tendency for the stucco to crack and if it's too thin, the mortar joints between the blocks may show through the stucco; thus, the wall loses part of its aesthetic look or appeal. The first coat you apply to the concrete wall is the scratch coat. I would suggest that you look at a new product that passed the large missle impact test in Fl with a thickness of only as thick as a nickel. Attachment of Metal Plaster Bases to Masonry/Concrete 17 18. 09.070.0103: Stucco Assembly - Stucco Over CMU with Insulation 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. CCP 2 is a traditional stucco assembly over wood or steel frame construction with a Dryvit approved sheathing and a Dryvit polymer finish. Wait for it to stiffen, and then scratch the surface with a raking tool to form 1/8-inch deep horizontal grooves. A good rule of thumb regarding R Value is that for every 1" of foam (thickness) it equates to roughly an R-4 rating. The bond and/or thickness of the cement plaster will determine the need for a lath. Most all fire-rated assemblies require 7/8-inch and some require a full 1-inch thick cement plaster. Let the scratch coat cure for 24 to 48 hours, keeping the . ASTM C926, Standard Specification for Application of Portland Cement-based Plaster , includes a Section 5.2, which discusses remedies when bond cannot be achieved over solid bases. Maximum Variation from True Flatness: 1/8 inch in 10 feet. Myth #1: Stucco on lath over CMU/concrete is superior to direct-applied. World's First and Only Thermal Stucco, Fire-Resistant Stucco, Water-Resistant Stucco, Light Weight Stucco, Sustainable Stucco, High Crack Resistant Stucco, Vapor Permeable Stucco, Ecologic Stucco, Mold Resistant Stucco, True Green Building Material, Sustainable Insulation, LEED Friendly, Title 24 Compliant, Acoustic Plaster, Precast Concrete . If you are contracting this out ask your contractor to furnish the ASTM standard for Stucco over NEW CMU it will state the requirements & method to use. The surface of the scratch coat needs to be perfectly vertical and must be the required thickness. All three systems consist of a 3/8-inch minimum thick layer of Diamond wall base coat that is embedded in metal lath. Lapping of Lath 16 SECTION C: MIXING & APPLICATION 17. astm c90 compliant concrete masonry units stucco thickness variations due to allowable cmu size tolerances notes . Application When applying this coat, don't wait for the scratch coat to completely dry. Table 4 summarizes the recommended nominal plaster coat thicknesses for both two and three coat work. Leave a thickness of about inch (6.4 mm) for the final coat. called Hard Coat Stucco, One Coat Stucco or Traditional Stucco Historically, Hard Coat Stucco is applied in three separate coats; each coat is permitted to cure for up to two weeks; final thickness averaged from 3/4 to 2 inches Stucco application has evolved to save time, labor and material; the process and blend is called One Coat Stucco What I would do with a ICF is apply a 2" thick foam(eps 1.5# density) that has a finish like brick, stucco or wood siding then a 2 man crew sprays a 2000 sq house in less than 2 days. Myth #1: Stucco on lath over CMU/concrete is superior to direct-applied. This coupled with the fact that attaching a lath and WRB to concrete . Specifics for these wall assemblies and allowable continuous insulation thickness are listed in the ICC Evaluation Report ESR 2564. There are two basic stucco applications used in Florida. Create horizontal grooves that are 1/8 (3mm) in thickness on your wall using a slotted palette, while keeping it perpendicular to the wall. Please, feel free to check out our recommended tools on the Amazon website below.https://www.stuccoplastering.com/tools/Kirk Giordano Plastering Inc.Howdy am. Properly done, it's a great combina on. 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. If you have cinder blocks and want to stucco over them, you would pressure wash first, then apply a base coat, then when it sets and cures usually about two weeks, you can apply a color . Thickness of foam can be greatly increased beyond two inches limited for cement stucco. A 4-inch (102 mm) inspection space above patio and garage slabs and entry areas. The minimum thickness over framed walls is 3/4-inch. Average Cost to Stucco a House The cost to stucco a 1,500-square-foot home is approximately $9,525, with most homeowners paying between $8,000 and $11,100 for materials and equipment, as well as planning, area preparation and protection, setup, stucco . The finish coat is applied from the top down and the whole wall surface must be covered without joinings (laps or interruptions). 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