Cement Board Stucco Systems - Ron Blank and Associates, Inc.
Transcription
Cement Board Stucco Systems - Ron Blank and Associates, Inc.
Cement Board Stucco Systems Mundise Mortimer National Gypsum Company 2001 Rexford Road Charlotte, NC 28211 704-365-7494 [email protected] www.nationalgypsum.com Please note: you will need to complete the conclusion quiz online at ronblank.com to receive credit An AIA Continuing Education Program Credit for this course is 1 AIA/CES HSW Learning Unit Course Number: NGC09E An American Institute of Architects (AIA) Continuing Education Program Approved Promotional Statement: g p provider with The American Ron Blank & Associates, Inc. is a registered Institute of Architects Continuing Education System. Credit earned upon completion of this program will be reported to CES Records for AIA members. Certificates of Completion are available for all course participants upon completion of the course conclusion quiz with +80%. Please note: you will need to complete the conclusion quiz online at ronblank.com bl k tto receive i credit dit This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA or Ron Blank & Associates, Inc. of any material of construction or any method or manner of h dli handling, using, i di distributing, t ib ti or d dealing li iin any material t i l or product. d t An American Institute of Architects (AIA) Continuing Education Program Course Format: This is a structured, web-based, self study course with a final exam. C Course C Credit: dit 1 H Health lth S Safety f t &W Welfare lf (HSW) Learning L i Unit U it (LU) Completion Certificate: A confirmation is sent to you by email and you can print one upon successful completion of a course or from your RonBlank.com transcript If you have any difficulties printing or receiving your Certificate please transcript. send requests to [email protected] Design professionals, please remember to print or save your certificate of completion after successfully completing a course conclusion quiz quiz. Email confirmations will be sent to the email address you have provided in your RonBlank.com account. Copyright This presentation is protected by U.S. and International copyright laws. R Reproduction, d ti di distribution, t ib ti di display l and d use of the presentation without written permission of © Ron Blank & Associates, Inc. 2007 and © National Gypsum Company 2007 is prohibited prohibited. Learning Objectives Upon Completion of this course the Design Professional will be able to: Describe the different “Stucco Stucco Look” Look options Explain what Cement-Board Stucco is List the Code Updates Explain the Cement-Board Stucco Code Acceptance Criteria Explain the Cement-Board Stucco installation and critical details Specify a Cement-Board Stucco system EFIS – Exterior Insulation Finish System ICF = Insulated Concrete Forms Stucco-Look Options Stucco-Look Options Cement Board Stucco System Description High High-impact impact and puncture-resistant puncture resistant Water-managed wall system Uses a cement-board core with a 2 coat synthetic stucco Specifically p y designed g for use in active residential, institutional and light commercial building System Components System Components System Components System Components Other Cement Board Applications pp Underlayment for Ceramic Tile Tub & Shower Enclosures Garden Tubs Swimming Pool Areas Whirlpool Decks Exterior Applications Ceramic Tile Sheathing and Soffits Cement-Board Stucco Features High-impact resistance Water-managed Sheet Stucco 2x Reinforced seams Reinforced base coat Speed/ease application Shapes attach easily Tradeoffs Non-insulated Planar irregularities Minor surface cracks at joints Benefits Tough, durable Protection No shrinkage cracks Controls seam cracks Weatherproofing Saves time & cuts scaffolding costs Design flexibility CBS = Cement Board Stucco GL = General Liability Comparing CBS with Stucco Cement Board Stucco Stucco High-impact resistance Water-managed + Dimensional stability Pre-fab stucco sheet Fewer control joints Reveals framing flaws High-impact resistance Water-managed Insulation option Design criteria Curing required Control joints/144 sq. ft. Susceptible to cracking only at board joints No GL exclusions $4.50 - 5.50/sq ft Creates planar irregularities Shrinkage cracking will occur No GL exclusions $3.00 - $4.00/sq ft EIFS - Exterior Insulation Finish System GL = General Liability Comparing CBS with EIFS Cement Board Stucco EIFS High-impact resistance Only water-managed Non-insulated + dimensional stability High degree of detailing Control joints Reveals framing flaws Minor surface cracks at joints No GL exclusions $4.50 - 5.50/sq ft Designed impact resistance PB or water-managed Thermal / noise insulation Design criteria / light Unlimited detailing Monolithic surface Hides planar irregularities Virtually crack-free surfaces Increased I d GL exclusions l i $4.25 - $5.50+/sq ft CBS - Cement Board Stucco CBS Relative Costs – One Market CBS Std EIFS Stucco Wrap Labor C Cement t Board B d $0.15 $0.10 $0 60 $0.60 $0.15 $0.10 Labor M/BC seams Labor Lamina L b Labor $0.80 $0.20 $ $0.20 $0.80 $2 40 $2.40 $5.25 > Per square q foot $0.20 $0 20 $0.75 $0.00 $0.50 $0.80 $2.25 $2 25 $4.75 > CBS Relative Costs OCS – One Coat Stucco (Per sq. foot) CBS OCS Stucco Wrap Labor Cement Board Labor M/BC seams Labor $0.15 $0.10 $0.60 $0 80 $0.80 $0.20 $0.20 Stucco Wrap Labor Lath/Trim Labor Stucco Labor $0.15 $0.10 $0.90 $0 50 $0.50 $0.10 $1.00 Lamina Labor $0.80 $2.40 $5 25> $5.25> Finish Labor $0.35 $1.20 $4 30 > $4.30 Relative Costs with Other Cladding g Based on installed cost for Residential* Brick WM-EIFS $ $6.50-7.50 sq. q ft. $4.50-6.00 sq. ft. CBS 1000 $4 75-5 $4.75 5.50 50 sq sq. ft ft. 3/8” Stucco/Finish $3.00-4.00 sq. ft. Vinyl LG $2 00-3 00 sq $2.00-3.00 sq. ft ft. * industry average Cement-Board Stucco Technical Review Cement Board Stucco Secondary y Sheathing g Options p Wood based sheathing Resistance to racking and shear Typically needed on residential/wood frame construction Gypsum sheathing Fire resistive properties Typically needed on commercial construction Cement Board Stucco Benefits of underlying/secondary sheathing Stiffer wall assembly. Double sheathing layer with offset joints reduces stress in finish surface Thermal break – alleviate mechanism for stud read through Solid backing for weather barrier eases weather barrier installation; less prone to construction damage Intended for use se on residential and low lo rise commercial construction Cement Board Stucco Systems y Limitations Rigid – Lack of intervening insulation increases stress/potential for minor cracks in finish surface s rface Thin veneer – planar irregularities in substrate may be evident C d Update Code U d t Approximate Areas of Code Influence Codes Three model code organizations: BOCA® ICBO® SBCCI® 1994 formed the International Code Council (ICC®) to create a single building regulatory ICBO Acceptance Criteria AC 59 Contains Provisions to demonstrate compliance of Cement Board Stucco ( (Direct Applied Systems) S ) with performance requirements of the Uniform Building Code Code. ICBO Evaluation Services (ES) Only ES to address a CBS wall system Cement board stucco evaluated under Acceptance Criteria For Direct-Applied Exterior Finish Systems (AC59) AC59 addresses combustibility, durability and serviceability AC59 An extensive test protocol “to specify the conditions under which a Directapplied Exterior Finish System S (DEFS) can be recognized in an ICBO Evaluation Service report report. System Performance Testing ICBO Acceptance Criteria for “Direct Applied” Systems Freeze/thaw Water resistance Transverse load (wind) Tensile bond strength Racking/shear Accelerated weathering Salt spray Restrained environmental cycling Summary of Application Steps Framing (wood or steel) Underlying/secondary sheathing Wood based or gypsum Weather resistive barrier (except ( t soffits) ffit ) Code recognized roll/sheet product (building paper paper, Tyvek Tyvek, etc etc.)) or roll-on or trowel on liquid air/weather barrier Applied pp over underlying/secondary y g y sheathing Summary of Application Steps Weather-Resistive Barrier – Roll/Sheet Type Horizontal lap not less than 2 inches Vertical lap p not less than 6 inches Free of holes and breaks except for those created by fasteners Secure barrier with 1.0 inch minimum crown staples or plastic washer head nails Tape all seams for optimum performance Roll/Sheet Weather Resistive Barrier Liquid Air/Weather Barrier – Roller Applied pp Applicator friendly Quick application Ready-mixed Ready mixed Applies directly to approved wall substrates Liquid-Applied Continuous membrane eliminates seams, lap joints and staples Adhesive attachment of EPS Higher wind-load ratings EPS - Expanded Polystyrene Liquid Air/Weather Barrier – Trowel Applied pp Creates a continuous membrane with no seams Breathable; resists delamination Highly water resistant; used on sloped parapets and window sills for added water resistance Low VOC content; environmentally friendly product Single component that is mixed with Portland cement on the job site Easy to mix and use VOC – Volatile Organic Compound Summary of Application Steps Cement Board Meet ASTM C 1325 ½” minimum thickness Apply pp y either horizontally y or vertically y with all vertical edges continuously supported Tapered edges facing outward Single piece around corners of openings Fit ends and edges closely Offset joints from underlying/ secondary sheathing joints Application 4” wide self adhering reinforcing alkali-resistant mesh at sheathing joints Summary of Application Steps Trim accessories Exterior grade PVC complying with ASTM D 1784 (Plastic Components, etc.) Control joint spacing – Install to create relative square panels no longer than 600 SF. No dimension to exceed 24 feet or a length-to-width ratio of 2½:1 PVC – Poly Vinyl Coatings Sample photo Sample photo Sample photo Sample photo Application Typical Corner and Termination Details Application Trim attachment--mechanical method Applicable on screw or nailable substrates. Fasten accessories 12 inches O.C. Insure that accessories lie flat against surface. Use stainless steel nails, screws or staples Sample Photo Summary of Application Steps Trim accessories Adhesive attachment option For non screw or nail-able substrates Secure accessories 12 inches O.C. with dabs of appropriate construction t ti adhesive dh i Apply Self Adhering Mesh at Joint 4” alkali-resistant strip p rests in track of the trim Apply Self Adhering Mesh Over All Joints Note vertical strips p in p photo Apply Base Coat over Mesh This photo shows initial coat of base over joints Board joints Control/expansion p jjoints EPS - Expanded Polystyrene Summary of Application Steps Shapes, quoins, trim, etc. Create with adhesively fastened EPS insulation board or …. Simple shapes can be constructed with additional layers of cement board R i f Reinforced d coating ti system t Embed Standard Reinforcing Mesh in base coat over entire cement board surface and allow to dry/cure Finish Coat Apply to dry, reinforced base coat Sample Photo Sample photo Sample photo Summary of Application Steps Framing Underlying Sheathing Weather Resistive Barrier Cement C t Board B d Trim Accessories Mesh Base Coat Shapes Reinforced Coating Finish Coat Ph t Gallery Photo G ll Application and completed projects Work in progress Market on the Green – Charlotte, NC Market on the Green – Charlotte, NC State Credit Union – Raeford, NC Residence – Columbia, SC Waterside IV Condo – Ft. Myers Beach, FL Social Security Offices – Kansas City Social Security Offices – Kansas City Social Security Offices – Kansas City Course Summary The Design Professional will now be able to: Describe the different “Stucco Look” options Explain what Cement-Board Stucco is List the Code Updates Explain p the Cement-Board Stucco Code Acceptance p Criteria Explain the Cement-Board Stucco installation and critical iti l details d t il Specify a Cement-Board Stucco system Cement Board Stucco Systems Mundise Mortimer National Gypsum Company 2001 Rexford Road Charlotte, NC 28211 704-365-7494 [email protected] www.nationalgypsum.com Please note: you will need to complete the conclusion quiz online at ronblank.com to receive credit An AIA Continuing Education Program Credit for this course is 1 AIA/CES HSW Learning Unit Course Number: NGC09E