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. Spread the base layer on the chimney to a thickness of the wood strips so that the stucco is even with the top of the strips. Therefore, thickness could be as thin as 3/4" and thick . Fibered Stucco may be used in place of TOTAL WALL Hard Coat. 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. A code approved water resistive . The correct thickness is then 5/8 inch. Download File 2018-BuildCrete-Stucco-Plaster-Pool-Plaster-Brochure-1.pdf - 1 MB. Access or vehicle ramps which rise to the interior finish floor elevation for the width of such ramps only. The overall thickness of this coat should be an inch for 2-coat processes and around inches for 3-coat work. srmi.biz Lathing over Framed Construction 16 16. Accessories 1. In ASTM C926, the Standard Specification for Application of Portland Cement-Based Plaster, thicknesses are provided for scratch, brown, and finish coats. This coupled with the fact that attaching a lath and WRB to concrete . Properly done, it's a great combina on. 3.resulting plaster thicknesses in excess of the allowances of table 4 of astm c926 to be evaluated by a design professional for augmentation requirements of section 6.2 of . TIP: vertical seams should be overlapped by 6 inches and horizontal seams should be overlapped by 4 inches. Depending on the contamination, you might only need to wash with water. Repairs over CMU blocks or other masonry surfaces require that we remove all loose stucco, apply a masonry bonding agent, and finally apply stucco and textured feathering around the patch. astm c90 compliant concrete masonry units stucco thickness variations due to allowable cmu size tolerances notes . How thick is exterior stucco? The surface of the scratch coat needs to be perfectly vertical and must be the required thickness. Paint or decorative cementitious finish less than 5 / 8 inch (17.1 mm) thick adhered directly to the masonry foundation sidewall. Step 2 Install trim accessories. . Apply a thin layer, about " (6.4mm) or " (12mm) using the trowel, and wait for it to dry slightly. Then three coats of masonry stucco cement are applied in a 3/8-inch scratch coat, followed by a 3/8-inch brown coat, and finally a 1/8-inch finish coat. Synthetic stucco consists of a polymer based laminate that is wet-applied, usually in two coats, to rigid insulation board that is fastened to the wall with adhesive, mechanical fasteners, or both. Unscrew the wood strips and fill in the space with stucco. The bond and/or thickness of the cement plaster will determine the need for a lath. Attachment of Metal Plaster Bases to Masonry/Concrete 17 18. Applies directly over EPS, stucco or (CMU) cement block etc. Place a flat edge over the strips and drag it to remove excess stucco. 3) Foam Insulating Board: The foam usually acts as a major insulator for the wall and can come in different thicknesses (ranging from 1" - 6") and the thicker the foam, the more R Value you can get out of your walls. 3. 2. The first coat you apply to the concrete wall is the scratch coat. BuildCrete is a true one-coat finish designed to adhere directly to any EPS foam, CMU block, DensGlass, Securock, concrete and other building materials. Apply the Scratch Coat. 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. Polymer based (PB) systems, sometimes known as thin coat, soft coat, or flexible finishes, are the most common. . 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 . Use firm trowel pressure to force the stucco into the lath. For unit masonry, that thickness is inch. Despite protestations by the stucco sub, stucco was installed on lath over concrete per the architect's direction.In our work as forensic . Cement Board Stucco (CBS) 1000 CI with MaxGrip Veneer Mortar. 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. StuccoMax is designed to be environmentally responsible, utilizing natural limestone sand and NO Portland type cements, it is sustainable and emits no pollutants. Florida Lath & Plaster Bureau 6353 Lee Vista Blvd. Download. The structural backup is concrete masonry, with rigid insulation between Z-channel furring. . Starting the Installation: Standard - Non WaterMaster Stucco System 12 13. You can apply stucco over wood sheathing, masonry or brick. Nominal thickness = 7/8". This is usually after 4 - 5 hours. 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. thickness allowed by c926 over the 2 narrower block. Use required pressure so as to press the mix into the wall as you go on applying it. Hello everyone, On this short video clip I am explaining the Stucco thickness on Cinder block or CMU walls. Channeled Adhesive CI Design with MaxGrip Veneer Mortar. Click to expand. A 4-inch (102 mm) inspection space above patio and garage slabs and entry areas. Some contractors will use paper or house wrap behind the stucco, but it's not necessary. For traditional stucco, a mechanical attachment is required (metal lath screwed to the wall through the plastic webs, or similar attachment). EXTERIOR SYSTEMS Stucco Over Concrete or Masonry Walls 600-609 01/05 . Access or vehicle ramps which rise to the interior finish floor elevation for the width of such ramps only. 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. It works like a primer that prepares the surface for the final coat, making it smoother and bond better. Commercial Cement Plaster (CCP) 2. Lapping of Lath 16 SECTION C: MIXING & APPLICATION 17. Specification: SMA Guide Specification for 3-coat Portland Cement Plaster (Stucco) applied to Framed Walls (2017) Specification: SMA Guide Specification for 2-coat Portland Cement Plaster (Stucco) applied to Concrete or Masonry Walls (2017) Note: Downloading any "specification" is acknowledgement of reading and agreeing to the SMA "Caveat . 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. After the cement is on the wall, a scratcher is used to make horizontal lines in the stucco mix, in order for the next coat (the brown coat) to stick to it. 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 . Boards are typically square cut and the largest common board size is usually 2 x 4. The difference in thickness with adjacent stucco also increases the likelihood of cracks developing. Make sure you apply the mix carefully, covering entire surface with a thick coat. 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. 12. Where stucco has been erroneously packed out without reinforcing, a fix . 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 5. 2. Myth #1: Stucco on lath over CMU/concrete is superior to direct-applied. Most all fire-rated assemblies require 7/8-inch and some require a full 1-inch thick cement plaster. You can smooth the coat with a float if you desire a smooth surface, or you can add a texture to it according to your preferences. Senergy Details. The finish coat is applied to a predamped, but still absorptive, base coat to a thickness of about in. 2D PDFs. These are direct-applied systems, meaning that there is no metal lath involved. Lath, Trim-Accessories 15 15. Get started with the application over the cinder wall using a trowel. Stucco thickness depends on the backup system and on whether or not lath is present. 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. The common minimum thickness for EPS insulation boards is 3/4 and the maximum is typically 4. However, the WRB (building paper and house wraps) prevents the bond between the plaster (stuc-co) and the concrete. Let the scratch coat cure for 24 to 48 hours, keeping the . Create horizontal grooves that are 1/8 (3mm) in thickness on your wall using a slotted palette, while keeping it perpendicular to the wall. 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. The thickness can be one-eighth- to one-half-inch, depending on your local building codes. The minimum thickness over framed walls is 3/4-inch. If. Maximum Variation from True Flatness: 1/8 inch in 10 feet. If your concrete-block basement walls are dry and free of . Work from the bottom of the stucco wall up and apply at a thickness of about inch over the entire area. CCP 2 is a traditional stucco assembly over wood or steel frame construction with a Dryvit approved sheathing and a Dryvit polymer finish. CCP 1 is a traditional stucco system (old) over concrete or CMU construction with modern polymer technology applied to the finish (new), providing the traditional stucco assembly . What is the correct thickness of stucco? Determine the location of the wall's water control layer (typically behind the insulation over the exterior sheathing). The cement is spread evenly among the surface at a depth of about 3/8 of an inch thick. A basic stucco assembly over concrete or CMU, applied directly over approved water-resistive barrier and metal lath with a Dryvit finish. Approved One-coat Stucco assemblies offer other options. Looks aren't an issue since this is the base layer. Concrete block makes an excep onal base for Port-land cement-based plaster (stucco). Sealing the CMU before stucco application renders this process null, and results in the future debonding of the stucco from the CMU. There are two basic stucco applications used in Florida. Microsoft Word - stucco over cmu (SMA) Author: HAWKFAN12 Created Date: 2/13/2020 5:18:35 PM . . Generally, stucco that is applied directly to solid surfaces is placed in two coats that together total 5/8 inch of thickness. Apply the base coat stucco using a square trowel held at a 45 degree angle. Load stucco on a hawk and then take it on trowel for application. Orlando, Florida 32822 Screed the material flat to a uniform 3/8-inch thickness with a straight-border darby or a straightedge. 5. 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 scratches will make the next layer stick better. 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. 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 . Specifics for these wall assemblies and allowable continuous insulation thickness are listed in the ICC Evaluation Report ESR 2564. Stucco thickness on Cinder block or CMU walls. 2D DWGs. BuildCrete has been used on ICF construction for its durability, strength, and ease of application. If you choose to do so, plan a total thickness stucco approximately 3/8 inch (9.5 mm) for concrete, and inch (13 mm) for masonry. Final coat is the color coat, about 3/16" thick, for a total stucco thickness of about 7/8" I have never heard of 2-coat stucco around here, although there is a one-coat stucco-like elastomeric product that is applied about 1/4" thick, over foam, one trade name being Dryvit. Stucco stairs, porches, & rails; Styrofoam Shapes, plaster repairs, cracks; Contact Me; You are here: Home / Videos / Stucco thickness over a cinder block wall. A variety of finish options are available including ColorTek stucco, AkroFlex acrylic stucco . Omega . The scratch coat must be scored horizontally on vertical surfaces. The CMU were installed in August (6 months ago). Over Masonry Stucco Repair. Direct Applied applications over concrete masonry may use a 1/4" ground-casing A stucco application consists of using a weather-resistive barrier with a metal lath that is attached to the substrate of the building. Myth #1: Stucco on lath over CMU/concrete is superior to direct-applied. PART 1 - GENERAL 1.1 SECTION INCLUDES Wait for it to stiffen, and then scratch the surface with a raking tool to form 1/8-inch deep horizontal grooves. Two-coat applications are only for use over solid plaster bases without metal lath. 3D PDFs. 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. 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 finish coat is applied from the top down and the whole wall surface must be covered without joinings (laps or interruptions). Wire stucco lath is placed over the foam insulating board and attached to the masonry below using concrete nails. 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 Stucco can be applied directly over the ICF, without a membrane above grade; below-grade requires waterproofing). 7 What should the thickness of stucco be over a CMU wall? August 5, 2016 . The two materials are made from the same basic ingredients and are extremely compa ble. Provides a hard, durable single coat over EPS and other exterior walls sheathings, over 3500 PSI compressive strength. 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