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2009 IBS - High Performance Masonry Walls

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Presentation for the 2009 International Builders Show by Mike Coulton, Director of Product Development & Marketing at Benjamin Obdyke.

Presentation for the 2009 International Builders Show by Mike Coulton, Director of Product Development & Marketing at Benjamin Obdyke.

Published in: Education, Business, Technology

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  • 1. High PerformanceHigh Performance ResidentialResidential Masonry WallsMasonry Walls in thein the 2121stst CenturyCentury Presented by:Presented by: Mike CoultonMike Coulton Director of Product DevelopmentDirector of Product Development Benjamin Obdyke IncorporatedBenjamin Obdyke Incorporated
  • 2. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated AGENDAAGENDA It’s about moisture managementIt’s about moisture management Why now?Why now? Case studyCase study Solution optionsSolution options Selecting the right solutionsSelecting the right solutions
  • 3. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated IntroductionIntroduction Need to incorporate goodNeed to incorporate good moisture management solutionsmoisture management solutions – Ward off problems – occupant healthWard off problems – occupant health mold, rot, sustainabilitymold, rot, sustainability – Energy efficiency of wallEnergy efficiency of wall – Code changes – complianceCode changes – compliance
  • 4. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated IntroductionIntroduction
  • 5. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated IntroductionIntroduction
  • 6. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated IntroductionIntroduction
  • 7. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated IntroductionIntroduction
  • 8. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Why Now?Why Now? We’ve been building masonryWe’ve been building masonry walls for centuries - why waterwalls for centuries - why water problems now?problems now? – Mass walls vs. veneer on wood framingMass walls vs. veneer on wood framing – Insulation practices – Energy crisis #1Insulation practices – Energy crisis #1 (1970s) and #2 (2000s)(1970s) and #2 (2000s)
  • 9. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Why Now?Why Now? Brick, stucco, stone walls haveBrick, stucco, stone walls have always absorbed lots of moisture –always absorbed lots of moisture – very porousvery porous Before tight envelopes (insulation andBefore tight envelopes (insulation and water/air resistive barriers):water/air resistive barriers): – Winter – dried inside to outsideWinter – dried inside to outside – Summer – dried outside to insideSummer – dried outside to inside
  • 10. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Why Now?Why Now? Tightened building envelopes areTightened building envelopes are great for saving energy, but badgreat for saving energy, but bad for “drying” walls outfor “drying” walls out OSB vs. planks or even plywoodOSB vs. planks or even plywood Water-resistive (not water-proof)Water-resistive (not water-proof) and air-resistive barriersand air-resistive barriers
  • 11. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated The NeedThe Need Preserving the life of exterior framingPreserving the life of exterior framing and sheathing – sustainability.and sheathing – sustainability. Reducing liability for callbacks,Reducing liability for callbacks, remediation, and litigation costs whenremediation, and litigation costs when moisture damage occurs.moisture damage occurs.
  • 12. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated The NeedThe Need Complying with growing codeComplying with growing code requirements:requirements: - IRC - Wall that “drains”IRC - Wall that “drains” – Water resistive barrier requirementWater resistive barrier requirement – State code requirements (MN, OR?)State code requirements (MN, OR?) – Canadian codesCanadian codes
  • 13. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Code Changes / RequirementsCode Changes / Requirements 2006 IRC Section 703.12006 IRC Section 703.1 – ““The exterior wall envelope shall be designedThe exterior wall envelope shall be designed and constructed in a manner that prevents theand constructed in a manner that prevents the accumulation of water within the wallaccumulation of water within the wall assembly by providing a water-resistantassembly by providing a water-resistant barrier behind the exterior veneer as requiredbarrier behind the exterior veneer as required by Section 703.2, andby Section 703.2, and a means of draininga means of draining water that enters the assembly to thewater that enters the assembly to the exteriorexterior.”.”
  • 14. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated 2006 IRC Section 703.22006 IRC Section 703.2 – ““One layerOne layer of No. 15 asphalt felt, free fromof No. 15 asphalt felt, free from holes and breaks, complying with ASTM Dholes and breaks, complying with ASTM D 226 for Type I felt or other approved226 for Type I felt or other approved water-water- resistive barrier shall be appliedresistive barrier shall be applied over studs orover studs or sheathing ofsheathing of all exterior walls.”all exterior walls.” Code Changes / RequirementsCode Changes / Requirements
  • 15. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated 2005 NBC of Canada Section 9.27.2.22005 NBC of Canada Section 9.27.2.2 – “…“…exterior walls exposed to precipitationexterior walls exposed to precipitation shallshall be protected against precipitation ingress bybe protected against precipitation ingress by an exterior cladding assembly consisting of aan exterior cladding assembly consisting of a first plane of protection andfirst plane of protection and a second plane ofa second plane of protection incorporating a capillary breakprotection incorporating a capillary break...”...” Code Changes / RequirementsCode Changes / Requirements
  • 16. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated 2005 NBC of Canada Section 9.27.2.22005 NBC of Canada Section 9.27.2.2 (cont.)(cont.) – “…“…a cladding assembly is deemed to have aa cladding assembly is deemed to have a capillary breakcapillary break between the cladding and thebetween the cladding and the backing assembly where …there is abacking assembly where …there is a draineddrained and vented air space not less than 10mm deepand vented air space not less than 10mm deep behind the cladding, over the full height of thebehind the cladding, over the full height of the wall…”wall…” Code Changes / RequirementsCode Changes / Requirements
  • 17. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study Homes on Philadelphia “Main Line”Homes on Philadelphia “Main Line” Built within last 10 yearsBuilt within last 10 years Moisture ProblemsMoisture Problems RemediationRemediation
  • 18. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 19. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 20. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 21. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 22. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 23. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study
  • 24. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study Cost to remediate $75,000 toCost to remediate $75,000 to $300,000+$300,000+ Tear off cladding, WRB,Tear off cladding, WRB, sheathing, insulation, somesheathing, insulation, some framingframing Do all this while occupiedDo all this while occupied
  • 25. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Case StudyCase Study Costs to prevent up-frontCosts to prevent up-front $1000 to $5000$1000 to $5000
  • 26. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Brick VeneerBrick Veneer What can we learn from brickWhat can we learn from brick veneer?veneer?
  • 27. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Brick VeneerBrick Veneer
  • 28. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Brick VeneerBrick Veneer Built with a space betweenBuilt with a space between cladding and sheathingcladding and sheathing Built with drainage at bottomBuilt with drainage at bottom (need to keep clear)(need to keep clear) Still uses WRB (one layer)Still uses WRB (one layer)
  • 29. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens A technique for controlling rain entryA technique for controlling rain entry in an exterior wallin an exterior wall Involves locating an air space wideInvolves locating an air space wide enough for capillary breakenough for capillary break immediately behind the exteriorimmediately behind the exterior claddingcladding
  • 30. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens When combined with openings at topWhen combined with openings at top and bottom, it creates a pressureand bottom, it creates a pressure equalized/moderated space to reduceequalized/moderated space to reduce forces leading to water entryforces leading to water entry Water that does enter behind theWater that does enter behind the cladding is not in direct contact withcladding is not in direct contact with sheathing wallsheathing wall
  • 31. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens The capillary break space – at leastThe capillary break space – at least 3/16” – can prevent surfactants from3/16” – can prevent surfactants from damaging the water resistive barrierdamaging the water resistive barrier Residual moisture is dried by airResidual moisture is dried by air movement (ventilation drying)movement (ventilation drying)
  • 32. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens Ventilation drying can also assist inVentilation drying can also assist in removing moisture vapor from insideremoving moisture vapor from inside the building moving outward and fromthe building moving outward and from solar drive from wet claddings movingsolar drive from wet claddings moving inward (remember those 2-way waterinward (remember those 2-way water resistive barriers)resistive barriers)
  • 33. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens Brick veneer constructionBrick veneer construction Strapping or furring stripsStrapping or furring strips Void space technology (“drainageVoid space technology (“drainage mats”, “ventilation mats”, “rolledmats”, “ventilation mats”, “rolled rainscreens”) – 21rainscreens”) – 21stst centurycentury
  • 34. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens
  • 35. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens
  • 36. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens
  • 37. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens
  • 38. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens The chief advantage of strapping is inThe chief advantage of strapping is in material costs – furring strips are lessmaterial costs – furring strips are less expensive than manufacturedexpensive than manufactured rainscreen productsrainscreen products Installing these strips is labor-Installing these strips is labor- intensive and therefore strapping mayintensive and therefore strapping may ultimately be more costly than voidultimately be more costly than void space productsspace products
  • 39. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated RainscreensRainscreens Strapping covers about 15% of the wallStrapping covers about 15% of the wall surface leading to trapped moisturesurface leading to trapped moisture Void space products are appliedVoid space products are applied continuously protecting the entire surfacecontinuously protecting the entire surface area of the wall and providing a levelarea of the wall and providing a level surface for masonry applicationsurface for masonry application Combination products provide theCombination products provide the rainscreen in same installation step as therainscreen in same installation step as the housewrap, reducing laborhousewrap, reducing labor
  • 40. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated ApplicationsApplications How is this technology used inHow is this technology used in masonry walls?masonry walls?
  • 41. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Applications – Brick VeneerApplications – Brick Veneer Natural rainscreenNatural rainscreen Must keep weep system “open” andMust keep weep system “open” and avoid clogging with mortar droppingsavoid clogging with mortar droppings Used to pull 1x or 2x board on wiresUsed to pull 1x or 2x board on wires up through wall or pour in pea gravel.up through wall or pour in pea gravel. 2121stst century – void space products atcentury – void space products at bottom of wallsbottom of walls
  • 42. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Applications – Brick VeneerApplications – Brick Veneer
  • 43. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Applications – Stucco,Applications – Stucco, Manufactured/Veneer StoneManufactured/Veneer Stone Create a rainscreen wall withCreate a rainscreen wall with void-space rolled matsvoid-space rolled mats – Roll out like a WRBRoll out like a WRB – Uniform thickness over wallUniform thickness over wall – Creates capillary break to separateCreates capillary break to separate cladding from sheathingcladding from sheathing – Promotes drainage and dryingPromotes drainage and drying
  • 44. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Applications – Stucco,Applications – Stucco, Manufactured/Veneer StoneManufactured/Veneer Stone
  • 45. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Applications – Stucco,Applications – Stucco, Manufactured/Veneer StoneManufactured/Veneer Stone
  • 46. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated ConclusionsConclusions Walls no longer dry by themselvesWalls no longer dry by themselves Heightened concern over moistureHeightened concern over moisture liability and changing codesliability and changing codes
  • 47. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated ConclusionsConclusions Building science agrees thatBuilding science agrees that rainscreen wall israinscreen wall is bestbest wall systemwall system and NAHB recent white paperand NAHB recent white paper recognizes.recognizes. Learn from brick veneer - create aLearn from brick veneer - create a space between the cladding and thespace between the cladding and the WRB/sheathing/framingWRB/sheathing/framing
  • 48. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated ConclusionsConclusions Advances in technology haveAdvances in technology have broadened the range of solutionsbroadened the range of solutions available to you to prevent problemsavailable to you to prevent problems Upfront cost $1000 to $5000 vs.Upfront cost $1000 to $5000 vs. $75,000 to $300,000+ after the fact$75,000 to $300,000+ after the fact
  • 49. © 2008 Benjamin Obdyke Incorporated© 2008 Benjamin Obdyke Incorporated Thank youThank you

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