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 Mobile ViewEXTERIORS of buildings ADHESIVES, EXTERIOR CONSTRUCTION AGE of a BUILDING - how to determine ALGAE, FUNGUS, LICHENS, MOSS ARCHITECTURE & BUILDING COMPONENT ID ATTIC CONDENSATION CAUSE & CURE BARK SIDE DOWN on DECKS, TRIM, STEPS BASEMENT WATERPROOFING BEST CONSTRUCTION PRACTICES GUIDE BRICK VENEER WALL Loose, Bulged BRICK WALL DRAINAGE WEEP HOLES BOOKSTORE - EXTERIORS CAULK GUN TYPES, CHOICES CAULKS & SEALANTS, EXTERIOR CHIMNEY INSPECTION DIAGNOSIS REPAIR DECK & PORCH CONSTRUCTION DECK COLLAPSE Case Study DECK FINISHES COATINGS PRESERVATIVES DECK FLASHING LEAKS, ROT Case Study DEFINITIONS of ENGINEERED WOOD OSB LVL etc EARTHQUAKE DAMAGED FOUNDATIONS ENERGY SAVINGS in buildings ENGINEERED WOOD Flooring ENGINEERED WOOD Products EXTERIOR WALL SIDING TRIM & FINISHES FIBERGLASS INSULATION FIBERGLASS HAZARDS FIBERGLASS INSULATION MOLD FLASHING, ASPHALT SHINGLE VALLEYS FLASHING, CLAY TILE ROOFS FLASHING MEMBRANES PEEL & STICK FLASHING for METAL ROOFS FLASHING ROOF WALL DETAILS FLASHING ROOF-WALL SNAFU FLASHING SIDING DETAILS FLASHING WALL DETAILS FLASHING WOOD ROOF DETAILS FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP FOOTING & FOUNDATION DRAINS FOUNDATION CRACKS & DAMAGE GUIDE FOUNDATION WATERPROOFING FRENCH DRAINS GALVANIC SCALE & METAL CORROSION GLUES ADHESIVES, EXTERIOR CONSTRUCTION GRADING & SITE WORK, EXTERIOR GUTTERS & DOWNSPOUTS HEAT TAPES & CABLES on Roofs for Ice Dams HOUSE PARTS, DEFINITIONS HOUSEWRAP INSTALLATION DETAILS HUMIDITY LEVEL TARGET ICE DAM PREVENTION INDOOR AIR QUALITY & HOUSE TIGHTNESS LEAD POISONING HAZARDS GUIDE LEAD TEST KIT for HOME USE LEED GREEN BUILDING CERTIFICATION LOG HOME GUIDE LIGHTNING PROTECTION MOISTURE CONTROL in BUILDINGS MOISTURE CALCULATIONS MOISTURE PROBLEMS: CAUSE & CURE MOLD DETECTION & INSPECTION GUIDE MVOCs & MOLDY MUSTY ODORS ODORS & SMELLS DIAGNOSIS & CURE PAINT ANALYSIS, DIAGNOSTIC USES PAINT & STAIN GUIDE, EXTERIOR PAINT / STAIN SELECTION & PROCEDURES PAINT & STAIN LIFE CHART PAINT FALURE, DIAGNOSIS, CURE, PREVENTION PAINT FAILURE CHECKLIST PAINTING MISTAKES PAINT FAILURE DICTIONARY PAINT FAILURE ANALYSIS LAB PHOTOS Paint Failure Case Photographs-SITE Paint Failure Case Photographs-LAB PAINT LAB SAMPLE PREPARATION PAINT SURFACE PREPARATION PORCHES & Sunrooms PORCH CONSTRUCTION & SCREENING RAILINGS, DECK & PORCH RAILINGS, STAIRWAY RETAINING WALL DESIGNS, TYPES, DAMAGE RETAINING WALL GUARD RAILINGS ROOF ARCHITECTURAL STYLES - PHOTO GUIDE ROOF CLEANING RECOMMENDATIONS ROOF COLOR RECOMMENDATIONS ROOF DORMER TYPES - PHOTO GUIDE ROOFING DIAGNOSIS INSPECTION & REPAIR ROT, FUNGUS, TERMITES ROT, TIMBER FRAME SEARS KIT HOUSES SEPTIC & CESSPOOL SAFETY SHEATHING, FIBERBOARD SHEATHING, Gypsum board SHEATHING Homasote & Other Board SHEATHING, OSB SHEATHING, Plywood SHEATHING, FOIL FACED - VENTS SIDING, Sheathing Identification - Photo Guide SIDING, ALUMINUM SIDING, ASBESTOS FIBER CEMENT SIDING ASPHALT ROOF SHINGLES on WALLS SIDING ASPHALT SHINGLE or SHEET SIDING DAMAGE by SPLASHBACK SIDING EIFS & STUCCO STUCCO EIFS DRAINAGE SYSTEMS SIDING EIFS WALL LEAK POINTS STUCCO OVER FOAM INSULATION STUCCO WALL METHODS & INSTALLATION STUCCO RECIPES & APPLICATION STUCCO THIN COAT APPLICATION SIDING EIFS STUCCO FAILURES DUE TO WEATHER SIDING EIFS STUCCO PAINT FAILURES SIDING, FIBER CEMENT SIDING HARDBOARD SIDING STEEL SIDING VINYL SIDING, WOOD PRODUCT CHOICES SIDING, WOOD INSTALLATION SIDING WOOD, FAILURES OVER FOAM BOARD SIDING WOOD, FLASHING DETAILS SIDING WOOD SHINGLE INSTALLATION SINKHOLES, WARNING SIGNS SOUND CONTROL in buildings STAINS on buildings - QUICK GUIDE STAIN DIAGNOSIS on BUILDING EXTERIORS STAIN DIAGNOSIS on BUILDING INTERIORS STAINS & FINISHES, INTERIOR STAINS on INDOOR SURFACES: PHOTO GUIDE STAINS & Thermal Tracking STAIN DIAGNOSIS on ROOFS STAIN DIAGNOSIS on STONE STAIRS, RAILINGS, LANDINGS, RAMPS STONE CLEANING METHODS STRESS SKIN INSULATED PANELS STRUCTURAL INSPECTIONS & DEFECTS STUCCO WALL METHODS & INSTALLATION STUCCO OVER FOAM INSULATION STUCCO PAINT FAILURES SURFACE GRADING, SITE DRAINAGE TERMITES, ROT THERMAL EXPANSION of MATERIALS THERMAL MASS in buildings TRIM, EXTERIOR CHOICES, INSTALLATION TRIM, INTERIOR INSTALLATION TRUSS UPLIFT, ROOF TRUSSES, Floor & Roof VAPOR BARRIERS & CONDENSATION in BUILDINGS VENTILATION in buildings VINYL Siding or PLASTIC Window ODORS in buildings VINYL CHLORIDE HEALTH INFO WALL SIDING TRIM & FINISHES WALL FINISHES INTERIOR WATER BARRIERS, EXTERIOR BUILDING WATER ENTRY in buildings WIND ENERGY SYSTEMS WIND TURBINES & LIGHTNING WINDOWS & DOORS WINTERIZE A BUILDING WOOD Burning Heaters Fireplaces Stoves More Information |
This article discusses the specifications for thin-coat stucco building exterior wall 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. InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.© Copyright 2012 InspectAPedia.com, Daniel Friedman, Steve Bliss, Wiley & Sons, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website. Thin-Coat Stucco Specifications
Readers should see STUCCO WALL METHODS & INSTALLATION, and also SIDING EIFS & STUCCO and STUCCO PAINT FAILURES and also may want to review POLYISOCYANURATE FOAM INSULATION. In an effort to speed up stucco application time and simplify the process, several manufacturers have introduced proprietary thin-coat stucco systems variously referred to as one-coat, two-coat, thin-coat, or fiberglass-reinforced stucco. Our photo of a thin-coat stucco wall being constructed (left) was at a Barnes and Noble bookstore in Poughkeepsie, NY. All these systems apply a single base coat and a top coat with a total thickness of 2/8 to 1/2-inch, compared to 7/8 to 1 inch for traditional three-coat stucco. The thinner finish weighs from 5 to 6 pounds per square foot, compared to 9 pounds for three-coat, and it is cost-competitive with traditional stucco. Like traditional three-coat stucco, thin-coat is applied over wire mesh or expanded metal lath by hand or pump. It is backed up by a waterproof drainage plane consisting of Grade D building paper, integral flashings, and a weep screed along the top of the foundation to drain away any trapped water. Some manufacturers, such as United States Gypsum, have introduced hybrid systems in which the stucco is applied to a cementitious board rather than to wire mesh. The advantage is that cement board is impervious to moisture. The drainage plane, and in some cases a layer of foam insulation, lies behind the cement board. Thin Coat Stucco Application Procedure
The base coat is premixed with only sand and water added at the job site. Most contractors using these systems apply an elastomeric color coat, similar to a thick acrylic paint with fine aggregate, and formulated to bridge small gaps less than 1/16-inch. This produces a smoother finish that is more water- and stain-resistant and less prone to cracking than a traditional stucco. The top coat can also be a traditional cement stucco finish. Most of these systems require a 24- to 48-hour moist cure and a total of six or seven days of curing before the top coat is applied. Some require a primer for acrylic finishes. Our thin-coat stucco wall damage photo (above-left) shows the vulnerability of this system to damage by common events at or around a building: in this case the use of a weed-whacker to trim growth close to the building wall. This EIFS installation is also installed so close to the ground as to invite insect attack on the structure. Also see Insects & Foam Insulation. Pros and Cons of Alternative Stucco Systems
Whether a customer prefers the uniform color of a synthetic finish or the more muted and variable color of cement stucco is a matter of taste. 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. On the downside, one-coat systems are less impact resistant than traditional three-coat stucco. 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. Also, one-coat stucco systems are not completely waterproof. Over time, water will find its way in at joints, penetrations, or cracks, and the synthetic stucco will be slower to dry out than the more permeable traditional stucco. Finally, each system is proprietary and must be installed according to the manufacturer’s approved specs and details, which vary from system to system. Otherwise, warranties are voided and code approvals, which are based on building code evaluation reports, are invalid. For both reasons, contractors should avoid mixing and matching components from different thin-coat systems. -- Adapted with permission from Best Practices Guide to Residential Construction. Exterior Insulation and Finish Systems (EIFS) Resources & SuppliersDryvit Systems www.dryvit.com Parex www.parex.com Senergy www.senergyeifs.com Sto Corp. www.stocorp.com Construction Sealant (Caulks) Suppliers & ProductsChemrex www.chemrex.com Polyurethanes and other high-performance sealantsDAP www.dap.com Acrylic latex caulks Dow Corning Sealants www.dowcorningsealants.com Silicone sealants GE Silicones www.gesilicones.com Silicone sealant Geocel Corp www.geocelusa.com Acrylic latex, tripolymer, copolymer, Kraton, and clear sealants Macklanburg-Duncan www.mdteam.com Acrylic latex sealants OSI Sealants Inc www.osisealants.com Polyseamseal PVA-based caulk. Pro Series includes latex, polyurethane, and Kraton sealants. www.phenoseal.com Phenoseal vinyl adhesive caulk Red Devil www.reddevil.com Acrylic, silicone, and butyl sealants Sashco Sealants www.sashco.com Big Stretch and Mor-Flexx water-based sealants, Lexel Kraton sealant Sika Corp www.sikaconstruction.com Complete line of Sikaflex polyurethane-based sealants, butyl sealant Tremco Inc. www.tremcosealants.com High-performance, architectural-grade sealants, UGL www.ugl.com Acrylic latex caulks White Lightning www.wlcaulk.com Tripolymer, butyl, polyurethane, silicone, elastomeric, and other high-performance sealants -- Adapted with permission from Best Practices Guide to Residential Construction. Questions & Answers regarding this articleQuestions & answers about the installation & specifications for one-coat or two -coat thin stucco applications on exterior building walls. . Ask a Question or Search InspectAPediaHTML Comment Box is loading comments...
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