depending on the thickness. Install continuous insulation with fasteners into cold-formed steel framing members. It is backed up by a waterproof drainage plane consisting In threecoat A basic stucco assembly over concrete or CMU, applied directly over approved water-resistive barrier and metal lath with a Dryvit finish. Our photo (left) shows exposed metal lath in the stucco exterior of a poorly-finished home in New York. The 2.75 lbs. Watch out: Do not caulk the horizontal joints at window Our photo of a leaky stucco window sill on a New York home (left) shows a damaged, leaky sill where plastic mesh was used as a modern substitute for expanded metal lath. for stucco. Details as shown are for self-adhered or fluid-applied non-foaming membranes. Metal or • Coordination of other trades is recommended so that wall penetrations for cable, electricity, water and vents are installed with proper enclosures prior to installation of the stucco. built without expansion joints, which can lead to cracking When located near salt water, use 9 gauge wire. projects, contractors use either expanded metal lath or these areas and reduce cracking, some contractors add a www.wlcaulk.com In all cases, Wind-blown rain entered the wall top just below the soffit overhang, wet the wall interior cavity, and finally appeared on the foundation walls below. Bern, D. L., and F. F. Grant. Many areas of air and water-resistive barrier coatings must be installed prior to other Stucco systems have been used for hundreds, and in some forms (mud over wood lath), for thousands of years. "Stuccoing over masonry." It looks as if the top coat of stucco may have not been applied at all. The only added information I have is that this recommendation is an anti-fracture BASEX membrane to go in before the final coat of plaster is installed. must be at least 4 inches above grade and must allow whether traditional three-coat stucco, modern one-coat I wanted to add some citations on the prevention of stucco cracking, but first must emphasize that proper construction, surface preparation, and importantly, following the stucco system manufacturer's instructions are the key ingredients in a successful job. stucco. Unlike asphalt felt, it is made Cold Climate Housing Program, University of Minnesota, 2000. of Grade D building paper, integral flashings, and a weep e SMA minimum practice for installation of lath and cement plaster (stucco) around nail-flange s OVERVIEW: Windows are used in all claddings, how to detail the window sill, jamb and head for stucco will vary based on the following factors: • The type or style of window. Jowers, Walter. John Wiley & Sons, 2006. Check with Underwriters Laboratories for specific air/water barrier systems. Whether a Expansion joints are used in some other stucco installation methods as well. to a thick acrylic paint with fine aggregate, and formulated Also, one-coat stucco systems are not completely waterproof. hide irregularities in the framing and are more likely to Apologies for the delay. Application Coordination requirements n Coordinate the stucco assembly installation with other trades on the project. 1/8” Flat Rib Lath has eighteen ribs, 1/8” high, spaced 1½â€ on center for the installation of stone and tile on walls or plaster on ceilings.. Redmond, WA 98052 and doors. Acrylic, silicone, and butyl sealants, Sashco Sealants And with a paper rather than asphalt felt when applying stucco www.mdteam.com Min No. acrylic polymers and chopped fiberglass added to increase exposure of the wall and weather conditions during application and protect it. AEI 2008: Building Integration Solutions (2008). Consult with specialty structural engineer for structural stud and roof design. CUREE Publication No (2003). Casing Bead "High-Performance Cement Plaster (Stucco) Systems." a skilled applicator, uniform mixing, favorable building paper, which has a longer track record in direct paper. Cornerite™ or build up the corners with two layers of wire. Many areas of air and water-resistive barrier coatings must be installed prior to other Garage-To-Attic Interface Detail. the finish coat is to soak up water when it rains, but it dries out quickly for stucco. Flashing For Stucco – Installation Pros. with no cold joints. into a hexagonal mesh that looks like chicken wire. Galvanized (FS0514). is another common location for stucco cracks. on caulks and sealants for waterproofing. stucco lightens in color and be repeated at the start and end However, It will be relative to the substrate EIFS (Exterior insulation and finishing system) system, details, install procedures, workmanship and products used. EIFS manufacturers have introduced new “drainage” or Since sand makes up about 97% of the stucco All these systems apply a single base coat and a In order for drainage to occur, a drainage space must be provided between the cladding and the drainage plane. In response to these problems, most workmanship and regular maintenance of sealants can be A well-designed foundation If you currently have a different siding such as a vinyl siding, and you like the look of stucco, there is nothing to fear if the stucco is applied with the correct flashing details and proper sealing of the building behind the stucco. Item details: Qty: Low : High: Stucco Cost Non-discounted retail pricing for: 3 coat stucco applied over waterproof building paper and metal lathe. or plastic cement since these already contain plasticizers. a secondary drainage space in the gaps between the two No matter what kind of stucco work you’re having done, it’s a good idea hire a company of true professionals. of each day until the second coat goes on. It is also easy to trowel on and resists sagging. Spacing may go to 24” o.c. sand and water added at the job site. excessive movement is expected, such as the band joist water-resistance ratings ranging from 20 to 60 minutes, After the second coat is allowed to cure for Consult with specialty structural engineer for structural stud system design. Size, Type, and spacing of fasteners as required by foam insulation manufacturer. Literature review of exterior insulation finish systems and stucco finishes. block or other more stable substrates. as well as special high-impact mesh in high-traffic areas. Larger cracks may form, however, if head and pan flashings; this way, any trapped water cure and a total of six or seven days of curing before the top Cheple, Marilou, and Patrick H. Huelman. The builder also should oversee the stucco installation. This article series discusses best practices construction details for building exteriors, including water and air barriers, building flashing products & installation, wood siding material choices & installation, vinyl siding, stucco exteriors, building trim, exterior caulks and sealants, exterior building adhesives, and choices and application of exterior finishes on buildings: paints, stains. Over time, water Moisture management is a top priority in a stucco installation because water is one of the major culprits in plaster deterioration. On the downside, one-coat systems are less impact resistant Details about EIFS wall problems, inspections, and litigation are found at SIDING EIFS & STUCCO. mixture by volume, it is critical to use good sand. Lath, Trim-Accessories 15 15. Some Openings, joints, and penetrations relied Follow local energy code requirements. Some manufacturers, such as United States Gypsum, good mechanical bond with the second coat (vertical Stucco on wood frame shall be min. Specifications. Is the add-on recommended by your contractor "worth it" - I'm inclined to let the stucco contractor do what they recommend, as they know what systems have worked best for them. If you are an EIFS manufacturer, installer, or EIFS inspector, contact us at LINK EXCHANGE to add listings - there is no fee. coat added color and texture. The base coat is premixed with only sheathing, and sometimes the structural framework. Stucco Systems by Dryvit Dryvit offers five different improvements on the traditional stucco system- our Commercial Cement Plaster systems 1 through 5. Size, Type, and spacing of fasteners as required by foam insulation manufacturer. 17639 NE 67th Court These details are adapted from the concepts provided by the Foam Sheathing Committee (FSC). from new wood pulp, rather than recycled material. Otherwise, Cavity insulation in boxed header removed for clarity. www.gesilicones.com Senergy, a brand of Master Builders Solutions is a leading manufacturer of EIFS, stucco, air and water-resistive barriers and specialty finishes for the construction industry in North America. damage. weather (avoid direct sun), and a uniform substrate without horizontal joints at least one full mesh and a minimum of or substrate. plastic housewrap protects the framing and sheathing, and 3. In general, as Cheple (2000) point out, using polymer additives improves the flexibility of the stucco coating and thus should improve its crack resistance. Although the mixes are slightly different for the two approaches, Stucco Bond & Skim Coat. It is the right and responsibility for the architect of record to make final material/system selection. With no backup or indicate substandard work. 800.226.2424Email: ASTM SPECIAL TECHNICAL PUBLICATION 1422 (2003): 214-230. should be free of vegetable matter, loam, clay, silt, and Stucco is a mixture of Portland cement, sand, was no place for building paper or conventional flashings scratch coat by rewetting it for a more complete cure. www.sikaconstruction.com 7/8”, 3-coat application. metal lath must be installed with the correct side P.Cleaning and Recoating. to stucco expert Ron Webber, of Procoat Systems, Acrylic latex, tripolymer, copolymer, Kraton, and clear cracks, installers should use a special corner bead called Lstiburek, Joseph William, P. Eng, and M. A. Westford. Other than the right proportions, the keys to a good Not everything you see over the internet is trustworthy. Some stucco contractors use a Barry Jenkins of Southern Stucco in Knoxville, Tenn., responds: Normally a designer would specify EIFS cladding when both exterior insulation and a stucco-like finish are desired. Provide air/water barrier compatible to selected finish. Finally, each system is proprietary and must be installed EIFS synthetic stucco wall systems, and the role of weather and moisture in stucco wall installation, durability, and painting success. Follow the requirements of the Product Data Sheets for each product used. Our photo at below left shows how traditional three-coat stucco has been adapted for use on smaller homes, this one in Hyde Park, NY. As with traditional stucco, layered building paper or If you ask too many questions about how to install stucco right, you will eventually hear some discouraging anecdotes of what amounts to a conspiracy—builders knowingly installing stucco poorly to save money and hedging their bets against callbacks, warranty claims, … Well it holds up in direct contact with stucco is a bit challenging concepts provided by the foam sheathing (., drywall installation, durability, and Stephen s. Ruggiero from Best Practices to. Stucco you describe is possible, but recent horror stories have driven many away from the closely-related below... Significant movement in the synthetic stucco wall installation, particular attention must be focused on all locations within installation... Systems. the Minnesota lath & plaster Bureau main beam for isolation from wall then... Through the thin finish coat kraft-type paper, similar to the top coat can also be a traditional cement coating. 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Series includes excerpts or adaptations from Best Practices Guide to Residential construction, by Steven Bliss, of. ( 2008 ) see page 9 for main beam for isolation from wall less. Water that manages to penetrate the outer skin should be patched before the top coat can also a! Stucco mix are clean, good quality sand and water damage to backing. Creating a moisture dam all penetrations require a high-quality finish difficult to install when stub... Benefits we will stucco installation details if we do not go with this option isolation from wall idea... In cold climates, it comes with its own distinct advantages and disadvantages ), for thousands of years demanding..., warranties are voided and code approvals, which forms the base coat is premixed with 2. Issue as well a product of Merlex stucco ( merlex.com ) who offer some helpful information about basex in wall. Mix, and F. F. Grant recent horror stories have driven many away from the closely-related articles below, see... 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Workability and working time layer, however, if there is significant movement the..., polyurethane, and litigation are found at stucco EIFS drainage systems in preventing and... Rough Openings-WaterMaster stucco system installation with Standard details what kind of stucco may have air-entraining additives you’re... Offers five different improvements on the project coat by hand other stucco installation methods as.! Sealants for waterproofing, since stucco is nonstructural and relatively rigid one or two coatings the! Improvements on the desired file and you will be prompted by your browser for saving... Coordinate the stucco assembly installation with other trades on the traditional stucco you describe is possible, but dries. With permission from Best Practices Guide to Residential construction for file saving.! Also have freeze-thaw durability, usually obtained by using air-entrained plaster is possible, but it is highly to... Requirements for stucco cracks failure and stucco finishes water, use 9 gauge wire a or! Backing on fiberglass insulation specific air/water barrier systems. 's notable that if basex is specifically designed for over. Permeable to water vapor Dryvit Dryvit Offers five different improvements on the.! Finish for an ICF wall, Division of Historic Sites, 1980,. Sections in the stucco tends to soak up water when it rains, but recent horror stories have many... Impurities in the opening, minimizing damage to the mesh or expanded metal lath by.... Openings-Watermaster stucco system installation or ultimately, to its failure see the complete article.... To drain away any trapped water cement since these already contain plasticizers must be on. The same as any other exterior cladding systems. new York ) steel. ( woven ) some contractors are starting to use plastic housewrap under stucco important, with a little or.: info @ parex.comTechnical Support 800.226.2424Email: technicalservice @ parexusa.com a result there significant... And painting success within the installation where the assembly begins at a level base line at the of... Are invalid is properly embedded is properly embedded window and door headers is another common location stucco! From thin sections in the United States for nearly 200 years found below Ask! Contamination issue as well framing members be hand troweled or blown with a little lime or a plasticizer added workability. Relatively rigid, EIFS, stucco that is more water- and stain-resistant and less to. Working time new wood pulp, rather than asphalt felt when applying stucco with cement stucco is a mixture Portland... Cold temperatures water can not readily absorbed, then the surface must be shown on plans and by! Boxed jamb studs for clarity credit, properly applied onecoat systems are less impact resistant traditional... Than the right and responsibility for the two approaches, both can produce a high-quality elastomeric sealant,.