2009 IBS - High Performance Masonry Walls

Loading...

Flash Player 9 (or above) is needed to view presentations.
We have detected that you do not have it on your computer. To install it, go here.

0 comments

Post a comment

    Post a comment
    Embed Video
    Edit your comment Cancel

    Favorites, Groups & Events

    2009 IBS - High Performance Masonry Walls - Presentation Transcript

    1. High Performance Residential Masonry Walls in the 21 st Century Presented by: Mike Coulton Director of Product Development Benjamin Obdyke Incorporated
    2. AGENDA
      • It’s about moisture management
      • Why now?
      • Case study
      • Solution options
      • Selecting the right solutions
      © 2008 Benjamin Obdyke Incorporated
    3. Introduction
      • Need to incorporate good moisture management solutions
        • Ward off problems – occupant health mold, rot, sustainability
        • Energy efficiency of wall
        • Code changes – compliance
      © 2008 Benjamin Obdyke Incorporated
    4. Introduction © 2008 Benjamin Obdyke Incorporated
    5. Introduction © 2008 Benjamin Obdyke Incorporated
    6. Introduction © 2008 Benjamin Obdyke Incorporated
    7. Introduction © 2008 Benjamin Obdyke Incorporated
    8. Why Now?
      • We’ve been building masonry walls for centuries - why water problems now?
        • Mass walls vs. veneer on wood framing
        • Insulation practices – Energy crisis #1 (1970s) and #2 (2000s)
      © 2008 Benjamin Obdyke Incorporated
    9. Why Now?
      • Brick, stucco, stone walls have always absorbed lots of moisture – very porous
      • Before tight envelopes (insulation and water/air resistive barriers):
        • Winter – dried inside to outside
        • Summer – dried outside to inside
      © 2008 Benjamin Obdyke Incorporated
    10. Why Now?
      • Tightened building envelopes are great for saving energy, but bad for “drying” walls out
      • OSB vs. planks or even plywood
      • Water-resistive (not water-proof) and air-resistive barriers
      © 2008 Benjamin Obdyke Incorporated
    11. The Need
      • Preserving the life of exterior framing and sheathing – sustainability.
      • Reducing liability for callbacks, remediation, and litigation costs when moisture damage occurs.
      © 2008 Benjamin Obdyke Incorporated
    12. The Need
      • Complying with growing code requirements:
        • IRC - Wall that “drains”
        • Water resistive barrier requirement
        • State code requirements (MN, OR?)
        • Canadian codes
      © 2008 Benjamin Obdyke Incorporated
    13. Code Changes / Requirements
      • 2006 IRC Section 703.1
        • “ The exterior wall envelope shall be designed and constructed in a manner that prevents the accumulation of water within the wall assembly by providing a water-resistant barrier behind the exterior veneer as required by Section 703.2, and a means of draining water that enters the assembly to the exterior .”
      © 2008 Benjamin Obdyke Incorporated
      • 2006 IRC Section 703.2
        • “ One layer of No. 15 asphalt felt, free from holes and breaks, complying with ASTM D 226 for Type I felt or other approved water-resistive barrier shall be applied over studs or sheathing of all exterior walls.”
      Code Changes / Requirements © 2008 Benjamin Obdyke Incorporated
      • 2005 NBC of Canada Section 9.27.2.2
        • “… exterior walls exposed to precipitation shall be protected against precipitation ingress by an exterior cladding assembly consisting of a first plane of protection and a second plane of protection incorporating a capillary break ...”
      Code Changes / Requirements © 2008 Benjamin Obdyke Incorporated
      • 2005 NBC of Canada Section 9.27.2.2 (cont.)
        • “… a cladding assembly is deemed to have a capillary break between the cladding and the backing assembly where …there is a drained and vented air space not less than 10mm deep behind the cladding, over the full height of the wall…”
      Code Changes / Requirements © 2008 Benjamin Obdyke Incorporated
    14. Case Study
      • Homes on Philadelphia “Main Line”
      • Built within last 10 years
      • Moisture Problems
      • Remediation
      © 2008 Benjamin Obdyke Incorporated
    15. Case Study © 2008 Benjamin Obdyke Incorporated
    16. Case Study © 2008 Benjamin Obdyke Incorporated
    17. Case Study © 2008 Benjamin Obdyke Incorporated
    18. Case Study © 2008 Benjamin Obdyke Incorporated
    19. Case Study © 2008 Benjamin Obdyke Incorporated
    20. Case Study © 2008 Benjamin Obdyke Incorporated
    21. Case Study
      • Cost to remediate $75,000 to $300,000+
      • Tear off cladding, WRB, sheathing, insulation, some framing
      • Do all this while occupied
      © 2008 Benjamin Obdyke Incorporated
    22. Case Study
      • Costs to prevent up-front
        • $1000 to $5000
      © 2008 Benjamin Obdyke Incorporated
    23. Brick Veneer
      • What can we learn from brick veneer?
      © 2008 Benjamin Obdyke Incorporated
    24. Brick Veneer © 2008 Benjamin Obdyke Incorporated
    25. Brick Veneer
      • Built with a space between cladding and sheathing
      • Built with drainage at bottom (need to keep clear)
      • Still uses WRB (one layer)
      © 2008 Benjamin Obdyke Incorporated
    26. Rainscreens
      • A technique for controlling rain entry in an exterior wall
      • Involves locating an air space wide enough for capillary break immediately behind the exterior cladding
      © 2008 Benjamin Obdyke Incorporated
    27. Rainscreens
      • When combined with openings at top and bottom, it creates a pressure equalized/moderated space to reduce forces leading to water entry
      • Water that does enter behind the cladding is not in direct contact with sheathing wall
      © 2008 Benjamin Obdyke Incorporated
    28. Rainscreens
      • The capillary break space – at least 3/16” – can prevent surfactants from damaging the water resistive barrier
      • Residual moisture is dried by air movement (ventilation drying)
      © 2008 Benjamin Obdyke Incorporated
    29. Rainscreens
      • Ventilation drying can also assist in removing moisture vapor from inside the building moving outward and from solar drive from wet claddings moving inward (remember those 2-way water resistive barriers)
      © 2008 Benjamin Obdyke Incorporated
    30. Rainscreens
      • Brick veneer construction
      • Strapping or furring strips
      • Void space technology (“drainage mats”, “ventilation mats”, “rolled rainscreens”) – 21 st century
      © 2008 Benjamin Obdyke Incorporated
    31. Rainscreens © 2008 Benjamin Obdyke Incorporated
    32. Rainscreens © 2008 Benjamin Obdyke Incorporated
    33. Rainscreens © 2008 Benjamin Obdyke Incorporated
    34. Rainscreens © 2008 Benjamin Obdyke Incorporated
    35. Rainscreens
      • The chief advantage of strapping is in material costs – furring strips are less expensive than manufactured rainscreen products
      • Installing these strips is labor-intensive and therefore strapping may ultimately be more costly than void space products
      © 2008 Benjamin Obdyke Incorporated
    36. Rainscreens
      • Strapping covers about 15% of the wall surface leading to trapped moisture
      • Void space products are applied continuously protecting the entire surface area of the wall and providing a level surface for masonry application
      • Combination products provide the rainscreen in same installation step as the housewrap, reducing labor
      © 2008 Benjamin Obdyke Incorporated
    37. Applications
      • How is this technology used in masonry walls?
      © 2008 Benjamin Obdyke Incorporated
    38. Applications – Brick Veneer
      • Natural rainscreen
      • Must keep weep system “open” and avoid clogging with mortar droppings
      • Used to pull 1x or 2x board on wires up through wall or pour in pea gravel.
      • 21 st century – void space products at bottom of walls
      © 2008 Benjamin Obdyke Incorporated
    39. Applications – Brick Veneer © 2008 Benjamin Obdyke Incorporated
    40. Applications – Stucco, Manufactured/Veneer Stone
      • Create a rainscreen wall with void-space rolled mats
        • Roll out like a WRB
        • Uniform thickness over wall
        • Creates capillary break to separate cladding from sheathing
        • Promotes drainage and drying
      © 2008 Benjamin Obdyke Incorporated
    41. Applications – Stucco, Manufactured/Veneer Stone © 2008 Benjamin Obdyke Incorporated
    42. Applications – Stucco, Manufactured/Veneer Stone © 2008 Benjamin Obdyke Incorporated
    43. Conclusions
      • Walls no longer dry by themselves
      • Heightened concern over moisture liability and changing codes
      © 2008 Benjamin Obdyke Incorporated
    44. Conclusions
      • Building science agrees that rainscreen wall is best wall system and NAHB recent white paper recognizes.
      • Learn from brick veneer - create a space between the cladding and the WRB/sheathing/framing
      © 2008 Benjamin Obdyke Incorporated
    45. Conclusions
      • Advances in technology have broadened the range of solutions available to you to prevent problems
      • Upfront cost $1000 to $5000 vs. $75,000 to $300,000+ after the fact
      © 2008 Benjamin Obdyke Incorporated
      • Thank you
      © 2008 Benjamin Obdyke Incorporated

    + benjaminobdykebenjaminobdyke, 11 months ago

    custom

    871 views, 0 favs, 0 embeds more stats

    Presentation for the 2009 International Builders Sh more

    More info about this presentation

    © All Rights Reserved

    • Total Views 871
      • 871 on SlideShare
      • 0 from embeds
    • Comments 0
    • Favorites 0
    • Downloads 13
    Most viewed embeds

    more

    All embeds

    less

    Flagged as inappropriate Flag as inappropriate
    Flag as inappropriate

    Select your reason for flagging this presentation as inappropriate. If needed, use the feedback form to let us know more details.

    Cancel
    File a copyright complaint
    Having problems? Go to our helpdesk?

    Categories