Presentation on theme: "0 PRESENTERS: Please read the speaker notes on this slide before every presentation of this course. It is important to adhere to the guidelines. This slide."— Presentation transcript:
0 PRESENTERS: Please read the speaker notes on this slide before every presentation of this course. It is important to adhere to the guidelines. This slide should be hidden during the actual presentation. I N N O V A T I O N S I N W A T E R P R O O F I N G S Y S T E M S Course Title: INNOVATIONS IN WATERPROOFING SYSTEMS Course Number:POL07A
1 Presents INNOVATIONS IN WATERPROOFING SYSTEMS An AIA Continuing Education Program Credit for this course is 1 AIA/CES Learning Unit for HSW credit. Course Title: INNOVATIONS IN WATERPROOFING SYSTEMS Course Number: POL07A
2 An American Institute of Architects (AIA) Continuing Education program Approved Promotional Statement: InfoSpec is a registered provider with The American Institute Of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates Of Completion for non-AIA members available on request. 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 of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
3 An American Institute of Architects (AIA) Continuing Education program Course Format: This is a structured, face to face course. Course Credit: 1 Health Safety & Welfare (HSW) learning unit (LU) Completion Certificate: A copy is sent to you by email upon request. When you fill out the Form B please indicate if you need one. Also please make sure the information you provide is legible. Send email request to: email@example.com@ronblank.com Design professionals please make sure and indicate request of certificate of completion when filling out the Form B at course conclusion. All AIA and non- AIA members who request a certificate of completion will be sent a copy of your certificate to the email address you provided in the Form B. Please make sure that when print your information that it is legible. If we can not read your writing we can not process your credit.
4 Course Objectives After completing this course the participants will have a better understanding of the following: Waterproofing Solutions that Protect the Owner’s Investment By… –Improving Indoor Air Quality –Protecting Your Concrete Floors And Walls –Preserving Structural Integrity
6 "85% of Vapor Barriers Fail" Vapor barriers are a well known problem area in the design and construction field. The problem comes from damage during construction. There is significant disagreement on what materials to use, where to place vapor barriers, and how to specify construction methods to avoid damage. What do we mean ?
7 Where does the "85 %” failure rate come from? The specific quote is taken from a consultant's report to the city of Los Angeles Department of Building and Safety: "…With respect to HDPE (vapor barriers), please be aware that under normal field applications it has been observed to experience a high failure rate reported to be as high as 85% in some cases." The full report, along with a listing of nine large projects known to be leaking and a Los Angeles Times article, can be found at this weblink: http://saveballona.org/techpages/boot.html
9 ASTM E 1643 - 98 SPECIFICATION : Standard Practice for Installation of Water Vapor Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs FROM THE EXCERPTS ABOVE, IT LOOKS LIKE: 1. Everybody on the ASTM committee agrees that these vapor barrier materials are likely to fail. 2. The committee does not agree on a solution. Need More Proof ?
10 The following slides include: I.A definition of vapor barriers II.A discussion of current vapor barrier standards III.A series of construction photographs which demonstrate the potential for construction abuse and damage to vapor barriers IV. Extracts from materials standards, construction specifications, and engineering bulletins: ASTM Portland Cement Association (PCA) American Concrete Institute (ACI)
12 DEFINITION OF VAPOR BARRIERS The industry uses various terms for vapor barriers: Vapor Retarders Vapor Barriers HDPE Polyethylene Film Reinforced polyethylene films Membranes, etc. Most of the industry considers the terms to be interchangeable. This presentation will use the term "Vapor Barrier"
13 Vapor Barriers are virtually impermeable polyethylene films which, according to ASTM E 1643 "...provide a method of limiting water vapor transmission upward through concrete slabs on grade…”
14 One Typical Vapor Barrier Configuration Vapor Barrier Configuration Adapted from PCA Concrete Floors on Ground Engineering Bulletin 075, Fig. 3.2
15 Historically, few construction projects used vapor barriers. However, use has increased in recent years because of concerns about: Damage to flooring above the slab by moisture Concerns about toxic mold Intrusion of chemical vapors and other hazardous contaminants from underground
16 PROPERTIES FOR COMMERCIAL GRADE VAPOR BARRIERS Note: Puncture resistance requirements are expressed in GRAMS, instead of pounds. (2200 grams = 4.85 pounds, 475 grams = 1.05 pounds)
17 Notice how thin this vapor barrier is Source: Portland Cement Association (#V2/144_5)
18 On most large projects, steel reinforcement (REBAR) is installed over the vapor barrier. The purpose of rebar is to minimize future cracking of the concrete slab, and to reduce warping or curling. Source: www.constructionphotographs.com (#a00305)
19 Source: www.constructionphotographs.com (#204602) Rebar installation includes cutting, which creates both sparks and sharp edges.
20 Rebar must be fastened at intersections to keep it evenly spaced. In this photo, the rebar is being welded together. If this job had used a vapor barrier, holes could have been burnt. Source: www.constructionphotographs.com
21 After rebar installation is complete, there are usually many areas where sharp edges touch the vapor barrier. Source: www.constructionphotographs.com (#a00306-section zoom)
22 There is also a lot of foot traffic on jobsites, as well as equipment. Source: Portland Cement Association (#82_5a)
23 Sometimes larger equipment is driven over the vapor barrier. Source: www.constructionphotographs.com (#a00305-section zoom)
24 For this placement, 15 workers are standing in the mix, each one endangering the vapor barrier. Source: Portland Cement Association (57_19)
26 Vibration of the concrete is a widely used method of consolidation. One manufacturer, Vibco, offers vibrators with head diameters between 1-3/8” and 3”. Sources: Wycotool (Vibrator Drawing) Vibco (Vibrator Specifications)
27 If you haven't seen enough unintentional construction damage, we should mention intentional vapor barrier damage: ASTM E 1643 - 98, section 6.3: "Avoid use of stakes driven through vapor retarder" PCA Engineering Bulletin 075, page 15: "The practice of intentionally punching holes through a vapor retarder to allow bleed-water to exit the slab bottom is unacceptable because it defeats the purpose of the membrane."
28 Summary of the problem: 1.Increased concerns about vapor penetrating slabs 1.A. Moisture damages flooring 2.B. Toxic mold from moisture vapor 3.C. Chemical vapor intrusion 4.D. Lawsuit potential 1.The industry standard is Vapor Barriers made of polyethylene: 1.A. Thin 2.B. Industry standard for puncture resistance: so low that it is expressed in GRAMS 1.ASTM E 1643 states that polyethylene vapor barrier materials are highly vulnerable to construction damage. 2.The big problem is construction damage.
29 Under-Slab Membrane THE INDOOR AIR QUALITY PROBLEM
30 The Next Generation of Under-sealing Waterproofing Membranes
31 Below grade self- sealing membrane system with a level of protection never before available. These Products Act As Barriers To: Moisture/Water Methane Gas Radon Gas Toxic Contaminants Termites Pesticides Stress Cracks Problems: Sick Office Solutions: Happy Office
32 THE UNDER-SLAB MEMBRANEACTS AS A BARRIER TO WATER & MOISTURE THE UNDER-SLAB MEMBRANE ACTS AS A BARRIER TO WATER & MOISTURE Geo-textile Fabric Rubberized Asphalt Polyethylene Reduces the amount and severity of cracking -more facts
37 THE BLIND SIDE MEMBRANE ACTS AS A BARRIER TO WATER & MOISTURE Geo-textile Fabric Rubberized Asphalt Polyethylene
38 BLIND SIDE MEMBRANE WATERPROOFING SYSTEM Geotextile Fabric for Bond to Concrete Stress Absorbing Barrier Formulation High Density, High Strength Polyethylene NEGATIVE SIDE MEMBRANE FOUNDATION WALL APPLICATION
49 Anti-fracture membranes protect ceramic tile by providing a stress absorbing layer between the substrate and the tile. If the concrete substrate underneath cracks, the stress of the crack is not transferred up to the brittle ceramic tile. The stress is absorbed by the rubbery nature of the rubberized asphalt. ANTI-FRACTURE MEMBRANES
51 FREEZE / THAW CYCLES During cold weather, slabs contract away from each other. In hot weather, slabs expand towards each other. OVERLAY OLD CONCRETE SLAB PAVEMENT BASE
52 Under-slab Membranes seal out: Moisture Termites Methane Gas Radioactive Radon Gas Mold Pesticides and Other Toxic Chemicals Under-slab Membranes act as ANTI-FRACTURE MEMBRANES FOR SLABS Continues sealing even under new cracks or moving joints Reduces the amount and severity of cracking in slabs above the membrane. Provides waterproofing, not just a vapor protection. IN SUMMARY:
53 Course Questions This concludes the continuing education course. The next 15 minutes will be focused on discussing the course material.
54 THIS CONCLUDES: INNOVATIONS IN WATERPROOFING SYSTEMS An AIA Continuing Education Program Credit for this course is 1 AIA/CES Learning Unit for HSW credit. Course Title: INNOVATIONS IN WATERPROOFING SYSTEMS Course Number: POL07A